CVE-2023-35941 is a critical vulnerability affecting Envoy proxy versions prior to 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12. A malicious client can craft credentials with permanent validity due to a flaw in the OAuth2 filter's HMAC payload check. This vulnerability carries a CVSS score of 9.8 (Critical), indicating it can be exploited remotely with low complexity, leading to high impact on confidentiality, integrity, and availability. While there is no evidence of active exploitation, exploit code, or significant community discussion, a workaround involves avoiding wildcards in host domain configurations.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 1.23.0, < 1.23.12CPE matchmatch criteria | cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* | ||
>= 1.24.0, < 1.24.10CPE matchmatch criteria | cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* | ||
>= 1.25.0, < 1.25.9CPE matchmatch criteria | cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* | ||
>= 1.26.0, < 1.26.4CPE matchmatch criteria | cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
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The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.