CVE-2021-43824

Common vulnerabilities & exposures (CVE)

CVE database CVE database blogpost Release & EoL database

Published at: - 23-02-2022 12:15

Last modified: - 01-03-2022 09:47

Total changes: - 4

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.

Common Vulnerability Scoring System (CVSS)

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

Low

Attack complexity

Network

Attack vector

High

Availability

None

Confidentiality

None

Integrity

None

Privileges required

Unchanged

Scope

None

User interaction

7.5

Base score

3.9

3.6

Exploitability score

Impact score

Verification logic

vendor=envoyproxy AND product=envoy AND versionEndExcluding=1.18.6

vendor=envoyproxy AND product=envoy AND versionStartIncluding=1.19.0 AND versionEndExcluding=1.19.3

vendor=envoyproxy AND product=envoy AND versionStartIncluding=1.20.0 AND versionEndExcluding=1.20.2

vendor=envoyproxy AND product=envoy AND versionStartIncluding=1.21.0 AND versionEndExcluding=1.21.1

Reference

Keywords

CVE-2021-43824

Common vulnerabilities & exposures (CVE)

Description

Common Vulnerability Scoring System (CVSS)

Verification logic

Reference

NVD

CVE-2021-43824

CVE

Common vulnerabilities & exposures

CVSS

Common vulnerability scoring system

Security

Vulnerabilities

Exposures