Description (CNA)
joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. Prior to 1.7.4, joserfc.jws.deserialize_json() accepts a JWS General JSON Serialization with an empty signatures array as authenticated. The verify_general_json() loop performs no iterations for the empty array and returns success because no signature check failed, allowing an attacker without a signing key to supply an arbitrary payload that relying applications may treat as authentic. The issue affects the General JSON Serialization path; compact JWS and JWT decoding, Flattened JSON serialization, and JWE JSON processing do not follow this vulnerable path. This issue is fixed in version 1.7.4.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| authlib / joserfc | affected < 1.7.4 |
CWE
CWE-290, CWE-345, CWE-347
References
- https://github.com/authlib/joserfc/security/advisories/GHSA-4pp3-559j-c5c2
- https://github.com/authlib/joserfc/commit/f409f8f058225d7686acab6546c94593e4c1bfbe
- https://github.com/authlib/joserfc/releases/tag/1.7.4
ADP enrichment
No English description supplied.