VulnerabilityModified
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.
CRITICAL 9.8EPSS 0.57%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.57%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.57% probability · 45th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-295
- Affected
- openbsd/libressl · openbsd/openbsd
- Source
- cve@mitre.org
References
- https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.4.2-relnotes.txtRelease Notes
- https://ftp.openbsd.org/pub/OpenBSD/patches/7.0/common/006_x509.patch.sigPatch
- https://github.com/openbsd/src/commit/3f851282810fa0ab4b90b3b1ecec2e8717ef16f8Patch
- https://security.netapp.com/advisory/ntap-20230517-0006/
- https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.4.2-relnotes.txtRelease Notes
- https://ftp.openbsd.org/pub/OpenBSD/patches/7.0/common/006_x509.patch.sigPatch
- https://github.com/openbsd/src/commit/3f851282810fa0ab4b90b3b1ecec2e8717ef16f8Patch
- https://security.netapp.com/advisory/ntap-20230517-0006/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.