Deserialization of Untrusted Data Affecting openjdk-jre package, versions [,1.7.0_331) [1.8.0,1.8.0_321) [9.0.0,11.0.14) [12.0.0,17.0.2)

openjdk-jre is a free and open-source implementation of the Java Platform, Standard Edition (Java SE).

Affected versions of this package are vulnerable to Deserialization of Untrusted Data the ObjectInputStream class implementation in the Serialization component did not check superclasses against the deserialization filter (defined via jdk.serialFilter system or security property) in cases when those classes were available locally and not included in the serialized stream. A specially-crafted serialized stream could possibly use this flaw to bypass class deserialization restrictions.

Serialization is a process of converting an object into a sequence of bytes which can be persisted to a disk or database or can be sent through streams. The reverse process of creating object from sequence of bytes is called deserialization. Serialization is commonly used for communication (sharing objects between multiple hosts) and persistence (store the object state in a file or a database). It is an integral part of popular protocols like Remote Method Invocation (RMI), Java Management Extension (JMX), Java Messaging System (JMS), Action Message Format (AMF), Java Server Faces (JSF) ViewState, etc.

Deserialization of untrusted data (CWE-502) is when the application deserializes untrusted data without sufficiently verifying that the resulting data will be valid, thus allowing the attacker to control the state or the flow of the execution.

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