CVE-2023-35941

EUVD-2023-39925

25.07.2023, 18:15

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.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	8.6 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
GitHub_M	CNA	8.6 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

Base Score

CVSS 3.x

EPSS Score

Percentile: 19%

Affected Products (NVD)

Vendor	Product	Version
envoyproxy	envoy	1.23.0 ≤ 𝑥 < 1.23.12
envoyproxy	envoy	1.24.0 ≤ 𝑥 < 1.24.10
envoyproxy	envoy	1.25.0 ≤ 𝑥 < 1.25.9
envoyproxy	envoy	1.26.0 ≤ 𝑥 < 1.26.4

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-116 - Improper Encoding or Escaping of Output
The software prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved.

References

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