Vulnerability CVE-2022-29217


Published: 2022-05-24

Description:
PyJWT is a Python implementation of RFC 7519. PyJWT supports multiple different JWT signing algorithms. With JWT, an attacker submitting the JWT token can choose the used signing algorithm. The PyJWT library requires that the application chooses what algorithms are supported. The application can specify `jwt.algorithms.get_default_algorithms()` to get support for all algorithms, or specify a single algorithm. The issue is not that big as `algorithms=jwt.algorithms.get_default_algorithms()` has to be used. Users should upgrade to v2.4.0 to receive a patch for this issue. As a workaround, always be explicit with the algorithms that are accepted and expected when decoding.

Type:

CWE-327

(Use of a Broken or Risky Cryptographic Algorithm)

 References:
https://github.com/jpadilla/pyjwt/security/advisories/GHSA-ffqj-6fqr-9h24
https://github.com/jpadilla/pyjwt/commit/9c528670c455b8d948aff95ed50e22940d1ad3fc
https://github.com/jpadilla/pyjwt/releases/tag/2.4.0

Copyright 2024, cxsecurity.com

 

Back to Top