CVE-2025-66220

Public on 2025-12-03
Modified on 2025-12-05
Description
Envoy is a high-performance edge/middle/service proxy. In 1.33.12, 1.34.10, 1.35.6, 1.36.2, and earlier, Envoy’s mTLS certificate matcher for match_typed_subject_alt_names may incorrectly treat certificates containing an embedded null byte (\0) inside an OTHERNAME SAN value as valid matches.
Severity
Medium severity
Medium
See what this means
CVSS v3 Base Score
5.0
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 2 - Ecs Extra ecs-service-connect-agent Pending Fix
Amazon Linux 2023 ecs-service-connect-agent Pending Fix

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 5.0 CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:L/A:N

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2025-66220 Mitre: CVE-2025-66220