Access Restriction Bypass

Affecting org.eclipse.jetty:jetty-webapp artifact, versions [9.4.37,9.4.43) || [10.0.1,10.0.6) || [11.0.1,11.0.6)

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Overview

org.eclipse.jetty:jetty-webapp is a maven plugin for Jetty web application support.

Affected versions of this package are vulnerable to Access Restriction Bypass. URIs can be crafted using some encoded characters to access the content of the WEB-INF directory and/or bypass some security constraints. For example, a request to /%u002e/WEB-INF/web.xml can retrieve the web.xml file. This can reveal sensitive information regarding the implementation of a web application. Similarly, an encoded null character can prevent correct normalization so that /.%00/WEB-INF/web.xml can also retrieve the web.xml file.

Remediation

Upgrade org.eclipse.jetty:jetty-webapp to version 9.4.43, 10.0.6, 11.0.6 or higher.

References

CVSS Score

5.3
medium severity
  • Attack Vector
    Network
  • Attack Complexity
    Low
  • Privileges Required
    None
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    Low
  • Integrity
    None
  • Availability
    None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Credit
cangqingzhe, CloverSecLabs
CVE
CVE-2021-34429
CWE
CWE-200
Snyk ID
SNYK-JAVA-ORGECLIPSEJETTY-1319666
Disclosed
16 Jul, 2021
Published
16 Jul, 2021