CVE-2023-35941
Last modified
CVE-2023-35941 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 0.71% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Envoyproxy | Envoy | >= 1.23.0, < 1.23.12 |
| Envoyproxy | Envoy | >= 1.24.0, < 1.24.10 |
| Envoyproxy | Envoy | >= 1.25.0, < 1.25.9 |
| Envoyproxy | Envoy | >= 1.26.0, < 1.26.4 |
References
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-7mhv-gr67-hq55Third Party Advisory
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-7mhv-gr67-hq55Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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