CVE-2020-2244 : Exploit Details and Defense Strategies

Jenkins Build Failure Analyzer Plugin 1.27.0 and earlier versions are affected by a cross-site scripting (XSS) vulnerability due to unescaped matching text in form validation responses.

Understanding CVE-2020-2244

This CVE involves a security issue in the Jenkins Build Failure Analyzer Plugin that could be exploited by attackers to execute XSS attacks.

What is CVE-2020-2244?

The vulnerability in Jenkins Build Failure Analyzer Plugin allows attackers to perform XSS attacks by providing console output for builds used to test build log indications.

The Impact of CVE-2020-2244

The vulnerability could be exploited by malicious actors to execute arbitrary code in the context of the affected application, potentially leading to unauthorized actions.

Technical Details of CVE-2020-2244

The technical aspects of the CVE include:

Vulnerability Description

Jenkins Build Failure Analyzer Plugin 1.27.0 and earlier versions do not escape matching text in form validation responses, leading to an XSS vulnerability.

Affected Systems and Versions

Product: Jenkins Build Failure Analyzer Plugin
Vendor: Jenkins project
Versions Affected: <= 1.27.0 (unspecified version type: custom)

Exploitation Mechanism

Attackers with the ability to provide console output for builds can exploit this vulnerability to execute XSS attacks.

Mitigation and Prevention

To address CVE-2020-2244, consider the following steps:

Immediate Steps to Take

Upgrade Jenkins Build Failure Analyzer Plugin to a version beyond 1.27.0.
Monitor and restrict access to console output for builds.

Long-Term Security Practices

Regularly update and patch Jenkins plugins to prevent vulnerabilities.
Implement input validation and output encoding to mitigate XSS risks.

Patching and Updates

Stay informed about security advisories from Jenkins project and promptly apply patches to secure your systems.