Home/CVE/Envoy is a high-performance edge/middle/service proxy. Envoy crashes in Proxy protocol when using an address type that i
CVE

CVE-2024-23325

Envoy is a high-performance edge/middle/service proxy. Envoy crashes in Proxy protocol when using an address type that i

Envoy is a high-performance edge/middle/service proxy. Envoy crashes in Proxy protocol when using an address type that isn’t supported by the OS. Envoy is susceptible to crashing on a host with IPv6 disabled and a listener config with proxy protocol enabled when it receives a request where the client presents its IPv6 address.

It is valid for a client to present its IPv6 address to a target server even though the whole chain is connected via IPv4. This issue has been addressed in released 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.

HIGH · CVSS 7.5 EPSS 0.00137
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-248Uncaught Exception
CWE-755Improper Handling of Exceptional Conditions
CWE-755Improper Handling of Exceptional Conditions
▤

Affected Products & Versions

4
envoyproxy envoy>= 1.26.0 and < 1.26.7
envoyproxy envoy>= 1.27.0 and < 1.27.3
envoyproxy envoy>= 1.28.0 and < 1.28.1
envoyproxy envoy>= 1.29.0 and < 1.29.1
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Feb 2024 · 11:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/envoyproxy/envoy/commit/bacd3107455b8d387889467725eb72aa0d5b5237PatchVendor Advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-5m7c-mrwr-pm26Vendor Advisory
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