CVE-2022-21655 HIGH

CVE-2022-21655: Incorrect handling of internal redirects results in crash in Envoy

Vendor Envoyproxy
Product envoy
Weakness CWE-670
Published February 22, 2022
Last update April 23, 2025

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 22, 2022 CVE published
April 23, 2025 Record updated