TI-2022-11768 Aliases CVE-2022-29225

Zip bomb vulnerability in Envoy

HIGH 72CWE-400Published 2022-06-09 · Updated 2025-04-22

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: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-400.

Summary

Envoy is a cloud-native high-performance proxy. In versions prior to 1.22.1 secompressors accumulate decompressed data into an intermediate buffer before overwriting the body in the decode/encodeBody. This may allow an attacker to zip bomb the decompressor by sending a small highly compressed payload. Maliciously constructed zip files may exhaust system memory and cause a denial of service. Users are advised to upgrade. Users unable to upgrade may consider disabling decompression.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.01607 76th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed envoy (envoyproxy): 1.22.1Red Hat: 2 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
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	before 1.22.1	1.22.1	Patch available	CNA

envoy Vendorenvoyproxy Affected before 1.22.1 Fixed in 1.22.1 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:envoyproxy:envoy::::::::	before 1.22.1	Vulnerable	envoyproxy

cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* Versions before 1.22.1 Vulnerable ·envoyproxy

Remediation

Fix · CNA envoy (envoyproxy) Fixed in 1.22.1

Red Hat 2 advisories

RHSA-2022:5004 Released 2022-06-13 · Red Hat rating Critical
Red Hat OpenShift Service Mesh 2.1.3 security update
- OpenShift Service Mesh 2.1 servicemesh-2.1.3-1.el8, servicemesh-cni-2.1.3-1.el8, servicemesh-operator-2.1.3-2.el8 +6
RHSA-2022:5003 Released 2022-06-13 · Red Hat rating Important
Red Hat OpenShift Service Mesh 2.0.10 security update
- OpenShift Service Mesh 2.0 servicemesh-proxy-2.0.10-1.el8

Vendor assessments

Red Hat

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

Product	Status	Plan or fix
OpenShift Service Mesh 2.0	Fixed	RHSA-2022:5003
OpenShift Service Mesh 2.1	Fixed	RHSA-2022:5004

Not affected: 2 products

OpenShift Service Mesh 2.0
OpenShift Service Mesh 2.1

Timeline

2026-10-02 Threatist record created from CVE-2022-29225

References

Exploit 1

https://github.com/envoyproxy/envoy/security/advisories/GHSA-75hv-2jjj-89hh

Patch 1

https://github.com/envoyproxy/envoy/commit/cb4ef0b09200c720dfdb07e097092dd105450343

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