CVE-2024-21664

Parsing JSON serialized payload without protected field can lead to segfault

CVSS 4.3 MEDIUMEPSS 0.9%CWE-476

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 4.3EPSS 0.9%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

09 Jan 2024Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

jwx is a Go module implementing various JWx (JWA/JWE/JWK/JWS/JWT, otherwise known as JOSE) technologies. Calling `jws.Parse` with a JSON serialized payload where the `signature` field is present while `protected` is absent can lead to a nil pointer dereference. The vulnerability can be used to crash/DOS a system doing JWS verification. This vulnerability has been patched in versions 2.0.19 and 1.2.28.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Affected products

lestrrat-go · jwx

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References

https://github.com/lestrrat-go/jwx/commit/0e8802ce6842625845d651456493e7c87625601f https://github.com/lestrrat-go/jwx/commit/8c53d0ae52d5ab1e2b37c5abb67def9e7958fd65 https://github.com/lestrrat-go/jwx/commit/d69a721931a5c48b9850a42404f18e143704adcd https://github.com/lestrrat-go/jwx/security/advisories/GHSA-pvcr-v8j8-j5q3