CVE-2023-35943
Last modified
CVE-2023-35943 is a high-severity vulnerability rated 7.5/10 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, the CORS filter will segfault and crash Envoy when the `origin` header is removed and deleted between `decodeHeaders`and `encodeHeaders`. EPSS estimates a 0.58% 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, the CORS filter will segfault and crash Envoy when the `origin` header is removed and deleted between `decodeHeaders`and `encodeHeaders`. 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, do not remove the `origin` header in the Envoy configuration.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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-mc6h-6j9x-v3gqExploit, Third Party Advisory
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-mc6h-6j9x-v3gqExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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