CVE-2021-21645 : What You Need to Know
Learn about CVE-2021-21645 impacting Jenkins Config File Provider Plugin versions <= 3.7.0. Understand the risk, impact, and mitigation steps for this security vulnerability.
A security vulnerability has been identified in the Jenkins Config File Provider Plugin 3.7.0 and earlier versions. Attackers with Overall/Read permissions can exploit this flaw to enumerate configuration file IDs.
Understanding CVE-2021-21645
This CVE pertains to a missing authorization vulnerability in the Jenkins Config File Provider Plugin.
What is CVE-2021-21645?
Jenkins Config File Provider Plugin 3.7.0 and earlier versions lack permission checks in various HTTP endpoints, allowing attackers with Overall/Read permissions to list configuration file IDs.
The Impact of CVE-2021-21645
This vulnerability could be exploited by malicious actors to gain sensitive information and potentially launch further attacks against the affected systems.
Technical Details of CVE-2021-21645
The technical details of the CVE-2021-21645 vulnerability are as follows:
Vulnerability Description
Jenkins Config File Provider Plugin versions <= 3.7.0 do not enforce permission checks in multiple HTTP endpoints, enabling unauthorized access to configuration file 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 being vulnerable to exploitation.
Exploitation Mechanism
Attackers with Overall/Read permissions can abuse this vulnerability to enumerate configuration file IDs, posing a risk to the confidentiality and integrity of the system.
Mitigation and Prevention
To address CVE-2021-21645, consider the following mitigation strategies:
Immediate Steps to Take
- Upgrade the Jenkins Config File Provider Plugin to a version beyond 3.7.0.
- Restrict Overall/Read permissions for potential attackers.
Long-Term Security Practices
- Regularly review and update permission settings within Jenkins instances.
- Employ the principle of least privilege to limit user access rights.
Patching and Updates
Stay informed about security advisories from the Jenkins project and promptly apply patches to ensure system security.