Description (CNA)
PyJWT is a Python implementation of JSON Web Token standards. From 2.13.0 until 2.14.0, HMACAlgorithm.from_jwk is affected because PyJWK verification path used the decoded key without applying prepare_key validation. This occurs when a trusted JWK Set contains an oct entry with an empty k value. As a result, an attacker signs an HMAC token with the same zero-length key accepted by PyJWT. Consequently, forged token can carry arbitrary authenticated claims. This issue is fixed in version 2.14.0.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| jpadilla / pyjwt | affected >= 2.13.0, < 2.14.0 |
CWE
CWE-347
References
- https://github.com/jpadilla/pyjwt/security/advisories/GHSA-9j54-fg26-wv3r
- https://github.com/jpadilla/pyjwt/commit/f91ed44dd65baaf457f4b3353ed35e98a753934c
- https://github.com/jpadilla/pyjwt/releases/tag/2.14.0
ADP enrichment
No English description supplied.