CVE-2021-21690 : What You Need to Know
Discover the impact, technical details, and mitigation steps for CVE-2021-21690 affecting Jenkins versions 2.318 and earlier, LTS 2.303.2 and earlier. Learn how to secure your systems.
A detailed overview of CVE-2021-21690 focusing on the impact, technical details, and mitigation steps.
Understanding CVE-2021-21690
This section will delve into the specifics of CVE-2021-21690 to provide a comprehensive understanding of the vulnerability.
What is CVE-2021-21690?
CVE-2021-21690 pertains to Jenkins versions 2.318 and earlier, LTS 2.303.2 and earlier, allowing agent processes to bypass file path filtering.
The Impact of CVE-2021-21690
The vulnerability enables agent processes to completely evade file path filtering mechanisms in affected Jenkins versions, potentially leading to unauthorized file access.
Technical Details of CVE-2021-21690
Explore the technical aspects of CVE-2021-21690, including the vulnerability description, affected systems, and exploitation mechanism.
Vulnerability Description
In Jenkins versions 2.318 and earlier, LTS 2.303.2 and earlier, agent processes can circumvent file path filtering by enclosing file operations in an agent file path.
Affected Systems and Versions
The impacted systems include Jenkins instances running versions 2.318 and prior, LTS versions 2.303.2 and prior.
Exploitation Mechanism
Attackers can exploit CVE-2021-21690 by manipulating agent processes to bypass file path restrictions and gain unauthorized access to files.
Mitigation and Prevention
Learn about the immediate steps to protect systems from CVE-2021-21690 and the long-term security practices to mitigate similar vulnerabilities.
Immediate Steps to Take
Administrators should update Jenkins to versions beyond 2.318 or LTS 2.303.2 to mitigate the vulnerability. Additionally, evaluate and enhance file path filtering mechanisms.
Long-Term Security Practices
Implement strict file access controls, regularly update Jenkins, and conduct security assessments to maintain the integrity of file operations and prevent unauthorized access.
Patching and Updates
Stay informed about security advisories from the Jenkins project and promptly apply patches and updates to address vulnerabilities like CVE-2021-21690.