CVE-2023-27491

Envoy forwards invalid Http2/Http3 downstream headers

State: Published
Severity: 5.4 Medium
Published: Apr 4, 2023
Updated: Feb 11, 2025
Reserved: Mar 1, 2023

Description

Envoy is an open source edge and service proxy designed for cloud-native applications. Compliant HTTP/1 service should reject malformed request lines. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, There is a possibility that non compliant HTTP/1 service may allow malformed requests, potentially leading to a bypass of security policies. This issue is fixed in versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9.

Scores

CVSS	Score	Vector	Source
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N	GitHub_M

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
envoyenvoyproxy	>= 1.25.0, < 1.25.3Affected >= 1.24.0, < 1.24.4Affected >= 1.23.0, < 1.23.6Affected < 1.22.9Affected

References

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