CVE-2021-21686

File path filters in the agent-to-controller security subsystem of Jenkins 2.318 and earlier, LTS 2.303.2 and earlier do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories.

Published: Nov 4, 2021
Updated: May 9, 2024
CVE: CVE-2021-21686
GHSA: GHSA-4g38-hrm4-rg94
Severity: High
Exploit:

CVSS v3:

Severity: High
Score: 8.1
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

CVSS v2:

Severity: Medium
Score: 5.8
AV:N/AC:M/Au:N/C:P/I:P/A:N

CWEs:

CWE-22
CWE-59

OWASP TOP 10:

A5 - Broken Access Control

Affected Software
References

Software	From	Fixed in
jenkins / jenkins	-	2.303.3
jenkins / jenkins	-	2.319
org.jenkins-ci.main / jenkins-core	-	2.319
org.jenkins-ci.main / jenkins-core	2.304	2.319

https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455

Vulnerability Database

289,599

CVE-2021-21686