CVE-2023-35941

Envoy vulnerable to OAuth2 credentials exploit with permanent validity

State: Published
Severity: 8.6 High
Published: Jul 25, 2023
Updated: Oct 24, 2024
Reserved: Jun 20, 2023

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	8.6 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L	GitHub_M

Weaknesses

CWE-116 Improper Encoding or Escaping of Output

Affected Products

Product	Versions
envoyenvoyproxy	>= 1.26.0, < 1.26.4Affected >= 1.25.0, < 1.25.9Affected >= 1.24.0, < 1.24.10Affected < 1.23.12Affected

References

https://github.com/envoyproxy/envoy/security/advisories/GHSA-7mhv-gr67-hq55

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