Vulnerability in Authlib
CVE-2024-37568
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.)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (29.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 29.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/lepture/authlib/issues/654 (Exploit, Issue Tracking)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.vicarius.io/vsociety/posts/algorithm-confusion-in-lepture-authlib-cve-2024-…
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2024-37568?
- CVE-2024-37568 is a high-severity vulnerability in Authlib, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2024-06-09.
- How severe is CVE-2024-37568?
- High severity. CVSS v3 base score is 7.5 out of 10.