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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Authlib Authlib
cpe:2.3:a:authlib:authlib:*:*:*:*:*:*:*:*
|
— |
1.6.9
|
References 3
https://github.com/authlib/authlib/commit/48b345f29f6c459f11c6a40162b6c0b742ef2…
security-advisories@github.com
https://github.com/authlib/authlib/releases/tag/v1.6.9
security-advisories@github.com
https://github.com/authlib/authlib/security/advisories/GHSA-7432-952r-cw78
security-advisories@github.com