CVE-2023-35943

Envoy vulnerable to CORS filter segfault when origin header is removed

State: Published
Severity: 6.3 Medium
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, 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.

Scores

CVSS	Score	Vector	Source
3.1	6.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:H	GitHub_M

Weaknesses

CWE-416 Use After Free

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-mc6h-6j9x-v3gq

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