Description
Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.9, a cryptographic padding oracle vulnerability was identified in the Authlib Python library concerning the implementation of the JSON Web Encryption (JWE) RSA1_5 key management algorithm. Authlib registers RSA1_5 in its default algorithm registry without requiring explicit opt-in, and actively destroys the constant-time Bleichenbacher mitigation that the underlying cryptography library implements correctly. This issue has been patched in version 1.6.9.
Problem types
CWE-203: Observable Discrepancy
CWE-327: Use of a Broken or Risky Cryptographic Algorithm
Product status
References
github.com/...uthlib/security/advisories/GHSA-7432-952r-cw78
github.com/...ommit/48b345f29f6c459f11c6a40162b6c0b742ef2e22
github.com/authlib/authlib/releases/tag/v1.6.9