CVE-2024-23327: Crash in proxy protocol when command type of LOCAL in Envoy
First published: Fri Feb 09 2024(Updated: )
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.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Envoy Proxy | >=1.26.0<1.26.7 | |
| Envoy Proxy | >=1.27.0<1.27.3 | |
| Envoy Proxy | >=1.28.0<1.28.1 | |
| Envoy Proxy | >=1.29.0<1.29.1 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-23327?
CVE-2024-23327 is classified as a high severity vulnerability due to the potential for service disruption through segfaults.
How do I fix CVE-2024-23327?
To mitigate CVE-2024-23327, upgrade Envoy to versions 1.26.8, 1.27.4, 1.28.2, or 1.29.2 or later.
What specific configurations are affected by CVE-2024-23327?
CVE-2024-23327 affects configurations where PPv2 is enabled on both the listener and the cluster.
What is the impact of exploiting CVE-2024-23327?
Exploiting CVE-2024-23327 can lead to a crash of the Envoy instance, resulting in service outages.
Which versions of Envoy are vulnerable to CVE-2024-23327?
Versions of Envoy from 1.26.0 to 1.26.7, 1.27.0 to 1.27.3, 1.28.0 to 1.28.1, and 1.29.0 to 1.29.1 are vulnerable to CVE-2024-23327.
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