SB2021100807 - Multiple vulnerabilities in Jenkins and Jenkins LTS

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Main Vulnerability Database SB2021100807

SB2021100807 - Multiple vulnerabilities in Jenkins and Jenkins LTS

Published: October 8, 2021

Security Bulletin ID SB2021100807
Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 67% Low 33%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Path Equivalence (CVE-ID: CVE-2021-21682)

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)

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)

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.

References