CVE-2024-23327 HIGH

CVE-2024-23327: Crash in proxy protocol when command type of LOCAL in Envoy

Vendor Envoyproxy
Product envoy
Weakness CWE-476
Published February 9, 2024
Last update June 9, 2025
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

Envoy is a high-performance edge/middle/service proxy. When PPv2 is enabled both on a listener and subsequent cluster, the Envoy instance will segfault when attempting to craft the upstream PPv2 header. This occurs when the downstream request has a command type of LOCAL and does not have the protocol block. This issue has been addressed in releases 1.29.1, 1.28.1, 1.27.3, and 1.26.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Key dates

02Disclosure timeline

February 9, 2024 CVE published
June 9, 2025 Record updated