Vulnerability in Openbsd Libressl
CVE-2021-46880
x509/x509_verify.c in LibreSSL before 3.4.2, and OpenBSD before 7.0 errata 006, allows authentication bypass because an error for an unverified certificate chain is sometimes discarded.
Vulnerability class: Improper Certificate Validation
EPSS: 0.006 (42.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Openbsd Libressl
- Openbsd
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Release Notes)
- cve@mitre.org (Patch)
- cve@mitre.org (Patch)
- cve@mitre.org
Frequently asked questions
- What is CVE-2021-46880?
- CVE-2021-46880 is a critical-severity vulnerability in Openbsd Libressl, classified under Improper Certificate Validation. CVSS score: 9.8/10. Published 2023-04-15.
- How severe is CVE-2021-46880?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-46880 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.