TI-2024-15427 Aliases CVE-2024-23325

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

MEDIUM 40CWE-248Published 2024-02-09 · Updated 2024-08-27

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Partial Red Hat: 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-248.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00751 55th percentileScored 2026-11-07

Fix Partial envoy (envoyproxy): 1.29.1, 1.28.1, 1.27.3 +1Red Hat: 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
envoyproxy	envoy	1.29.0 to before 1.29.1; 1.28.0 to before 1.28.1; 1.27.0 to before 1.27.3; before 1.26.7	1.29.1, 1.28.1, 1.27.3, 1.26.7	Patch available	CNA

envoy Vendorenvoyproxy Affected 1.29.0 to before 1.29.1; 1.28.0 to before 1.28.1; 1.27.0 to before 1.27.3; before 1.26.7 Fixed in 1.29.1, 1.28.1, 1.27.3, 1.26.7 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:envoyproxy:envoy::::::::	1.26.0 to before 1.26.7; 1.27.0 to before 1.27.3; 1.28.0 to before 1.28.1; 1.29.0 to before 1.29.1	Vulnerable	envoyproxy

cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* Versions 1.26.0 to before 1.26.7; 1.27.0 to before 1.27.3; 1.28.0 to before 1.28.1; 1.29.0 to before 1.29.1 Vulnerable ·envoyproxy

Remediation

Fix · CNA envoy (envoyproxy) Fixed in 1.29.1, 1.28.1, 1.27.3, 1.26.7

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
OpenShift Service Mesh 2	Affected	No fix yet

Timeline

2026-10-02 Threatist record created from CVE-2024-23325

References

Patch 1

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

Advisory 1

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

TI-2026-79288 Out-of-bounds write in Google Brotli decoder KEVCVSS 4.0CRITICAL 9.2
TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
TI-2024-20001 HTTP/2: CPU exhaustion due to CONTINUATION frame flood CVSS 3.1HIGH 7.5
TI-2024-18524 HTTP/2: memory exhaustion due to CONTINUATION frame flood CVSS 3.1HIGH 7.5
TI-2023-12215 Envoy client may fake the header `x-envoy-original-path` CVSS 3.1CRITICAL 9.1
TI-2023-18002 Envoy vulnerable to OAuth2 credentials exploit with permanent validity CVSS 3.1CRITICAL 9.8

See all 126 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences