CVE-2022-36908 in OpenShift Deployer Plugin
Summary
by MITRE • 07/27/2022
A cross-site request forgery (CSRF) vulnerability in Jenkins OpenShift Deployer Plugin 1.2.0 and earlier allows attackers to check for the existence of an attacker-specified file path on the Jenkins controller file system and to upload a SSH key file from the Jenkins controller file system to an attacker-specified URL.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 07/27/2022
This cross-site request forgery vulnerability in the Jenkins OpenShift Deployer Plugin affects versions 1.2.0 and earlier, representing a significant security risk that could enable attackers to perform unauthorized operations on the Jenkins controller. The flaw stems from insufficient validation of cross-site requests, allowing malicious actors to exploit the plugin's functionality through crafted web requests that appear to originate from legitimate users within the Jenkins environment. The vulnerability specifically targets the plugin's file handling capabilities, creating a path for attackers to manipulate the Jenkins controller's file system through seemingly benign operations.
The technical exploitation of this CSRF vulnerability enables attackers to perform two distinct but related malicious operations. First, the vulnerability allows for reconnaissance activities where attackers can probe the Jenkins controller's file system to determine the existence of specific file paths, effectively creating a directory traversal capability. Second, the flaw permits the extraction of SSH key files from the controller's file system and their subsequent upload to attacker-controlled URLs, which could provide unauthorized access to connected systems. This dual nature of the vulnerability transforms a simple CSRF issue into a potential escalation vector for more serious attacks.
The operational impact of this vulnerability extends beyond immediate data exposure, as it could facilitate broader compromise of the Jenkins infrastructure and connected systems. An attacker who successfully exploits this vulnerability could gain access to sensitive authentication materials stored in SSH key files, potentially enabling lateral movement within the network or access to production environments managed through Jenkins. The ability to check file system existence also provides attackers with valuable reconnaissance information that could inform subsequent exploitation attempts. This vulnerability particularly affects organizations that rely heavily on Jenkins for continuous integration and deployment operations, where the controller often maintains access to critical infrastructure and sensitive data.
Mitigation strategies should focus on immediate patching of the affected plugin to version 1.2.1 or later, which addresses the CSRF validation issues. Organizations should also implement additional security measures including CSRF token validation for all plugin operations, enhanced access controls for file system operations, and monitoring for suspicious file access patterns. The vulnerability aligns with CWE-352, which specifically addresses cross-site request forgery flaws, and may be categorized under ATT&CK technique T1566 for social engineering through CSRF attacks. Network segmentation and principle of least privilege access controls should be implemented to limit the potential damage from successful exploitation, while regular security assessments should verify that no other plugins in the Jenkins environment contain similar vulnerabilities.