CVE-2021-21686 Information

Description

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.

CVSS Vector

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

Reference

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

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

NONE

Base Severity

8.1