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Authlib has algorithm confusion with asymmetric public keys

High severity GitHub Reviewed Published Jun 9, 2024 to the GitHub Advisory Database • Updated Aug 15, 2024

Package

pip authlib (pip)

Affected versions

>= 0, < 1.3.1

Patched versions

1.3.1

Description

lepture Authlib before 1.3.1 has algorithm confusion with asymmetric public keys. Unless an algorithm is specified in a jwt.decode call, HMAC verification is allowed with any asymmetric public key. (This is similar to CVE-2022-29217 and CVE-2024-33663.)

References

Published by the National Vulnerability Database Jun 9, 2024
Published to the GitHub Advisory Database Jun 9, 2024
Reviewed Jun 10, 2024
Last updated Aug 15, 2024

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS score

0.054%
(23rd percentile)

Weaknesses

CVE ID

CVE-2024-37568

GHSA ID

GHSA-5357-c2jx-v7qh

Source code

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