#VU57978 Missing Authorization in Jenkins and Jenkins LTS - CVE-2021-21685
Published: November 8, 2021
Vulnerability identifier: #VU57978
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2021-21685
CWE-ID: CWE-862
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 authorization checks.
The vulnerability exists due to the affected application does not check agent-to-controller access to create parent directories in FilePath#mkdirs. A remote attacker can read and write arbitrary files on the Jenkins controller file system.
Remediation
Install updates from vendor's website.