CVE-2021-21643 : Security Advisory and Response
Learn about CVE-2021-21643, a critical vulnerability in Jenkins Config File Provider Plugin allowing unauthorized access to system credentials. Find mitigation steps here.
This CVE article provides an insight into CVE-2021-21643, a vulnerability in the Jenkins Config File Provider Plugin that allows attackers to enumerate system-scoped credentials IDs stored in Jenkins.
Understanding CVE-2021-21643
This section delves into the details of the vulnerability, its impact, technical description, affected systems, exploitation mechanism, mitigation, and prevention strategies.
What is CVE-2021-21643?
The Jenkins Config File Provider Plugin version 3.7.0 and earlier have a flaw that results in inadequate permission checks on certain HTTP endpoints. This oversight enables threat actors with global Job/Configure permission to identify system-scoped credential IDs.
The Impact of CVE-2021-21643
The vulnerability poses a significant security risk as it allows malicious users to extract sensitive credential information from Jenkins without proper authorization.
Technical Details of CVE-2021-21643
Let's explore the specific technical aspects of this vulnerability.
Vulnerability Description
Jenkins Config File Provider Plugin 3.7.0 and prior versions lack proper permission validation on various HTTP endpoints, enabling unauthorized access to system-scoped credential IDs.
Affected Systems and Versions
The affected product is the Jenkins Config File Provider Plugin with versions less than or equal to 3.7.0, impacting instances where this plugin is deployed.
Exploitation Mechanism
Exploiting this vulnerability requires an attacker to have global Job/Configure permissions within the Jenkins environment.
Mitigation and Prevention
It is crucial to take immediate action to secure Jenkins instances from potential exploitation.
Immediate Steps to Take
Administrators should upgrade the Jenkins Config File Provider Plugin to a patched version beyond 3.7.0 to mitigate the vulnerability. Additionally, reviewing and tightening permission settings within Jenkins is recommended.
Long-Term Security Practices
Maintain a proactive approach to security by regularly updating and patching Jenkins plugins and monitoring for unauthorized access attempts.
Patching and Updates
Stay informed about security advisories from Jenkins and promptly apply patches to address known vulnerabilities.