CVE-2024-23325

Envoy crashes when using an address type that isn’t supported by the OS

HIGH

7.5

CVSS Score

Published: February 9, 2024 at 10:47 PM UTC

Updated: June 17, 2026 at 07:12 AM UTC

1 product affected across 1 vendorEnvoy

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Severity

HIGH7.5

Exploit prediction

EPSS 0.8%

SSVC

No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Envoy · Envoyproxy

95%

v < 1.26.7v < 1.27.3v < 1.28.1v < 1.29.11.26.0 ≤ v < 1.26.71.27.0 ≤ v < 1.27.31.28.0 ≤ v < 1.28.11.29.0 ≤ v < 1.29.11.27.0 1.28.0 1.29.0

Affected range stops below 1.26.7, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.27.3, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.28.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.29.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCPatchVendor Advisory

Source: [email protected]

https://github.com/envoyproxy/envoy/commit/bacd3107455b8d387889467725eb72aa0d5b5237

x_refsource_CONFIRMVendor Advisory

Source: [email protected]

https://github.com/envoyproxy/envoy/security/advisories/GHSA-5m7c-mrwr-pm26

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHGitHub_M

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-248CWE-755

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