CVE-2022-21655

HIGH

envoyproxy/envoy < 1.18.6 - Denial of Service via Internal Redirect to Direct Response Route

Title source: llm
STIX 2.1

Description

Envoy is an open source edge and service proxy, designed for cloud-native applications. The envoy common router will segfault if an internal redirect selects a route configured with direct response or redirect actions. This will result in a denial of service. As a workaround turn off internal redirects if direct response entries are configured on the same listener.

References (2)

Core 2
Core References
Issue Tracking, Third Party Advisory x_refsource_confirm
https://github.com/envoyproxy/envoy/security/advisories/GHSA-7r5p-7fmh-jxpg

Scores

CVSS v3 7.5
EPSS 0.0110
EPSS Percentile 61.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-670
Status published
Products (1)
envoyproxy/envoy < 1.18.6
Published Feb 22, 2022
Tracked Since Feb 18, 2026