Protection Mechanism Failure in Jenkins and Jenkins LTS - CVE-2021-21690
Published: November 8, 2021
Vulnerability identifier: #VU57983
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2021-21690
CWE-ID: CWE-693
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Jenkins
Affected software:
Jenkins
Jenkins LTS
Jenkins
Jenkins LTS
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to agent processes are able to completely bypass file path filtering by wrapping the file operation in an agent file path. An attacker can bypass implemented security restrictions and elevate privileges on the system.
How to mitigate CVE-2021-21690
Install updates from vendor's website.