#VU57989 Protection Mechanism Failure in Jenkins and Jenkins LTS - CVE-2021-21696
Published: November 8, 2021
Vulnerability identifier: #VU57989
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-21696
CWE-ID: CWE-693
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Jenkins
Jenkins LTS
Jenkins
Jenkins LTS
Software vendor:
Jenkins
Jenkins
Description
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to the affected application does not limit agent read/write access to the libs/ directory inside build directories when using the FilePath APIs. A remote authenticated attacker can replace the code of a trusted library with a modified variant and execute arbitrary code on the system.
Remediation
Install updates from vendor's website.