CVE-2019-16552 : Vulnerability Insights and Analysis
Learn about CVE-2019-16552 affecting Jenkins Gerrit Trigger Plugin <= 2.30.1. Find out how attackers can exploit this vulnerability and steps to mitigate the risk.
The Jenkins Gerrit Trigger Plugin version 2.30.1 and earlier has a vulnerability that allows users with specific permissions to establish connections to HTTP URLs or SSH servers using custom credentials.
Understanding CVE-2019-16552
This CVE involves a missing permission check in the Jenkins Gerrit Trigger Plugin, potentially leading to unauthorized access.
What is CVE-2019-16552?
A missing permission check in Jenkins Gerrit Trigger Plugin 2.30.1 and earlier allows users with certain permissions to connect to specified HTTP URLs or SSH servers using user-defined credentials.
The Impact of CVE-2019-16552
- Attackers with Overall/Read permission can establish connections to attacker-specified HTTP URLs or SSH servers using attacker-specified credentials.
- They can also check the existence of a file with a given path on the Jenkins master.
Technical Details of CVE-2019-16552
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability in the Jenkins Gerrit Trigger Plugin allows unauthorized users to connect to specified HTTP URLs or SSH servers and check file existence on the Jenkins master.
Affected Systems and Versions
- Product: Jenkins Gerrit Trigger Plugin
- Vendor: Jenkins project
- Versions Affected: <= 2.30.1
Exploitation Mechanism
Attackers exploit the missing permission check to establish connections to HTTP URLs or SSH servers and check file paths on the Jenkins master.
Mitigation and Prevention
Protect your systems from CVE-2019-16552 with the following steps:
Immediate Steps to Take
- Upgrade Jenkins Gerrit Trigger Plugin to a version beyond 2.30.1.
- Restrict Overall/Read permissions to trusted users.
Long-Term Security Practices
- Regularly review and update Jenkins plugins for security patches.
- Implement least privilege access controls to limit unauthorized actions.
Patching and Updates
- Stay informed about security advisories from Jenkins project.
- Apply patches promptly to address known vulnerabilities.