CVE-2023-43499 : Exploit Details and Defense Strategies

Jenkins Build Failure Analyzer Plugin 2.4.1 and earlier versions are vulnerable to stored cross-site scripting (XSS) due to failure cause names not being properly escaped in build logs.

Understanding CVE-2023-43499

This CVE affects Jenkins Build Failure Analyzer Plugin versions up to 2.4.1, leaving systems exposed to potential XSS attacks.

What is CVE-2023-43499?

The vulnerability in Jenkins Build Failure Analyzer Plugin allows attackers with the ability to create or update failure causes to exploit stored XSS through unescaped failure cause names in build logs.

The Impact of CVE-2023-43499

The impact of this CVE is significant as it enables malicious actors to execute arbitrary scripts in the context of an authenticated user when viewing affected build logs.

Technical Details of CVE-2023-43499

The following provides insight into the vulnerability details and the systems affected by CVE-2023-43499.

Vulnerability Description

Jenkins Build Failure Analyzer Plugin up to version 2.4.1 fails to properly escape failure cause names in build logs, leading to stored cross-site scripting (XSS) vulnerabilities exploitable by attackers.

Affected Systems and Versions

Systems with Jenkins Build Failure Analyzer Plugin versions up to 2.4.1 are vulnerable to the XSS attack due to unescaped failure cause names in build logs.

Exploitation Mechanism

Attackers with the ability to create or update failure causes in Jenkins can insert malicious scripts into build logs, exploiting the XSS vulnerability to execute arbitrary code.

Mitigation and Prevention

Protecting your systems from CVE-2023-43499 requires immediate action and long-term security measures.

Immediate Steps to Take

Update Jenkins Build Failure Analyzer Plugin to version 2.4.2 or higher to mitigate the XSS vulnerability.
Monitor build logs for any suspicious activity that may indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update all Jenkins plugins to the latest versions to ensure protection against known vulnerabilities.
Implement security best practices to prevent and detect XSS attacks in build logs.

Patching and Updates

Stay informed about security advisories and patches released by Jenkins Project to address vulnerabilities like CVE-2023-43499.