CVEvulnerability

CVE-2021-43824

7.5 HIGH Published 2022-02-22 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2022-02-22
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected])
4.3 MEDIUM — AV:N/AC:M/Au:N/C:N/I:N/A:P
Weaknesses
CWE-476

Description

Envoy is an open source edge and service proxy, designed for cloud-native applications. In affected versions a crafted request crashes Envoy when a CONNECT request is sent to JWT filter configured with regex match. This provides a denial of service attack vector. The only workaround is to not use regex in the JWT filter. Users are advised to upgrade.

Affected configurations

• envoyproxy envoy (< 1.18.6) • envoyproxy envoy (>= 1.19.0 < 1.19.3) • envoyproxy envoy (>= 1.20.0 < 1.20.2) • envoyproxy envoy (>= 1.21.0 < 1.21.1)

Related

Weakness · CWE (1)

  • CWE-476 NULL Pointer Dereference weakness

References