CVE-2019-16554 : Exploit Details and Defense Strategies
Learn about CVE-2019-16554 affecting Jenkins Build Failure Analyzer Plugin versions 1.24.1 and earlier. Find out how attackers exploit a missing permission check to trigger resource-intensive operations.
A vulnerability in the Jenkins Build Failure Analyzer Plugin versions 1.24.1 and earlier allows attackers with specific permissions to exploit a missing permission check, potentially leading to resource-intensive operations.
Understanding CVE-2019-16554
This CVE involves a security issue in the Jenkins Build Failure Analyzer Plugin that could be exploited by attackers with certain permissions.
What is CVE-2019-16554?
Attackers with Overall/Read permission in Jenkins Build Failure Analyzer Plugin versions 1.24.1 and earlier can exploit a vulnerability due to a missing permission check. This exploitation can trigger Jenkins to evaluate a resource-intensive regular expression.
The Impact of CVE-2019-16554
The vulnerability allows unauthorized users to perform computationally expensive operations, potentially leading to denial of service or performance degradation.
Technical Details of CVE-2019-16554
This section provides more technical insights into the vulnerability.
Vulnerability Description
A missing permission check in Jenkins Build Failure Analyzer Plugin 1.24.1 and earlier enables attackers with specific permissions to force Jenkins to evaluate a computationally expensive regular expression.
Affected Systems and Versions
- Product: Jenkins Build Failure Analyzer Plugin
- Vendor: Jenkins project
- Versions Affected: <= 1.24.1
- Version Type: Custom
Exploitation Mechanism
Attackers with Overall/Read permission can exploit the vulnerability by bypassing the missing permission check, causing Jenkins to execute a resource-intensive regular expression.
Mitigation and Prevention
To address CVE-2019-16554, follow these mitigation strategies:
Immediate Steps to Take
- Upgrade Jenkins Build Failure Analyzer Plugin to a version beyond 1.24.1.
- Restrict Overall/Read permissions to trusted users only.
Long-Term Security Practices
- Regularly review and update Jenkins plugins to the latest versions.
- Implement the principle of least privilege to limit user permissions.
Patching and Updates
- Apply security patches and updates promptly to mitigate known vulnerabilities in Jenkins plugins.