TI-2024-15424 Aliases CVE-2024-23322

Envoy crashes when idle and request per try timeout occur within the backoff interval

LOW 34CWE-416Published 2024-02-09 · Updated 2024-08-01

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-416 and the CVSS impact.

Summary

Envoy is a high-performance edge/middle/service proxy. Envoy will crash when certain timeouts happen within the same interval. The crash occurs when the following are true: 1. hedge_on_per_try_timeout is enabled, 2. per_try_idle_timeout is enabled (it can only be done in configuration), 3. per-try-timeout is enabled, either through headers or configuration and its value is equal, or within the backoff interval of the per_try_idle_timeout. 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 0.00679 52nd 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: No
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-2024-23322

References

Patch 1

https://github.com/envoyproxy/envoy/commit/843f9e6a123ed47ce139b421c14e7126f2ac685e

Advisory 1

https://github.com/envoyproxy/envoy/security/advisories/GHSA-6p83-mfmh-qv38

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