Path traversal in Jenkins and Jenkins LTS - CVE-2021-21686
Published: November 8, 2021
Vulnerability identifier: #VU57979
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-21686
CWE-ID: CWE-22
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 perform directory traversal attacks.
The vulnerability exists due to file path filters do not canonicalize paths. A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.
How to mitigate CVE-2021-21686
Install update from vendor's website.