by Kastro CVE-2023-35941
envoyproxy envoy — Envoy vulnerable to OAuth2 credentials exploit with permanent validity
Description · from the CVE record
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12, a malicious client is able to construct credentials with permanent validity in some specific scenarios. This is caused by the some rare scenarios in which HMAC payload can be always valid in OAuth2 filter's check. Versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12 have a fix for this issue. As a workaround, avoid wildcards/prefix domain wildcards in the host's domain configuration.
Affected
ProductAffectedFixed inSource
envoy>= 1.26.0, < 1.26.4–CNA
envoy>= 1.25.0, < 1.25.9–CNA
envoy>= 1.24.0, < 1.24.10–CNA
envoy< 1.23.12–CNA
Scores by source
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)8.6CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: partial