python-jose through 3.5.0 fails to properly validate asymmetric keys in HMAC initialization, accepting DER-encoded public keys that lack PEM armor or SSH prefixes. Attackers holding the service's public key can forge HS256 tokens that pass verification when algorithms are not explicitly restricted. This is an incomplete fix for CVE-2024-33663.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Python-Jose_Project Python-Jose
cpe:2.3:a:python-jose_project:python-jose:*:*:*:*:*:*:*:*
|
— |
<= 3.5.0
|
References 6
https://github.com/advisories/GHSA-6c5p-j8vq-pqhj
disclosure@vulncheck.com
https://github.com/mpdavis/python-jose
disclosure@vulncheck.com
https://github.com/mpdavis/python-jose/blob/018b310ddb8b50dcfd09a0c152117835a21…
disclosure@vulncheck.com
https://github.com/mpdavis/python-jose/blob/018b310ddb8b50dcfd09a0c152117835a21…
disclosure@vulncheck.com
https://github.com/mpdavis/python-jose/issues/414
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/python-jose-through-3.5.0-algorithm-confus…
disclosure@vulncheck.com