Deserialization of Untrusted Data Affecting org.redisson:redisson package, versions [,3.22.0)


Severity

Recommended
0.0
critical
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Proof of concept
EPSS
0.23% (61st percentile)

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  • Snyk IDSNYK-JAVA-ORGREDISSON-5932096
  • published5 Oct 2023
  • disclosed4 Oct 2023
  • creditTony Torralba, Joe Farebrother

Introduced: 4 Oct 2023

CVE-2023-42809  (opens in a new tab)
CWE-502  (opens in a new tab)

How to fix?

Upgrade org.redisson:redisson to version 3.22.0 or higher.

Overview

Affected versions of this package are vulnerable to Deserialization of Untrusted Data when the Netty framework is used to deserialize Java objects from messages received from the Redis server. An attacker can execute arbitrary code and potentially take control of the client's machine by tricking the client into communicating with a malicious server that includes specially crafted objects in its responses.

Note:

Even after the fix, it is recommended to not use Kryo5Codec as deserialization codec, as it is still vulnerable to arbitrary object deserialization due to the setRegistrationRequired(false) call. On the contrary, KryoCodec is safe to use. The fix applied to SerializationCodec only consists of adding an optional allowlist of class names, even though making this behavior the default is recommended.

Details

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.

References

CVSS Scores

version 3.1