High severity · published Feb 9, 2024
CVE-2024-23327
Crash in proxy protocol when command type of LOCAL in Envoy
7.5
CVSS
0.7%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EN
envoy · envoyproxy
>= 1.29.0, < 1.29.1; >= 1.28.0, < 1.28.1; >= 1.27.0, < 1.27.3; < 1.26.7 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-23327
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-23327
Patch
https://github.com/envoyproxy/envoy/commit/63895ea8e3cca9c5d3ab4c5c128ed1369969d54a
Third Party Advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-4h5x-x9vh-m29j
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