SB2021100807 - Multiple vulnerabilities in Jenkins and Jenkins LTS
Published: October 8, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Path Equivalence (CVE-ID: CVE-2021-21682)
CWE-ID: CWE-42 - Path Equivalence
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to improper handling of equivalent directory names on Windows. A remote authenticated attacker can change or replace configurations of jobs and other entities.
2) Improper Certificate Validation (CVE-ID: CVE-2014-3577)
CWE-ID: CWE-295 - Improper Certificate Validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to improper certificate validation. A remote attacker can perform a man-in-the-middle (MitM) attack and spoof SSL servers via a "CN=" string in a field in the distinguished name (DN) of a certificate.
3) Path traversal (CVE-ID: CVE-2021-21683)
CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences on Windows. A remote authenticated attacker can send a specially crafted HTTP request and read arbitrary files on the system.
Remediation
Install update from vendor's website.