CVE-2021-21649 : Exploit Details and Defense Strategies
Learn about CVE-2021-21649 impacting Jenkins Dashboard View Plugin versions <= 2.15. Understand the vulnerability, its impact, affected systems, exploitation, and mitigation steps.
Jenkins Dashboard View Plugin version 2.15 and earlier are affected by a stored cross-site scripting (XSS) vulnerability. Attackers with View/Configure permission can exploit this issue by manipulating URLs in Image Dashboard Portlets.
Understanding CVE-2021-21649
This CVE impacts Jenkins Dashboard View Plugin versions 2.15 and below, leaving them vulnerable to stored XSS attacks.
What is CVE-2021-21649?
CVE-2021-21649 is a vulnerability in Jenkins Dashboard View Plugin versions 2.15 and earlier, enabling attackers with specific permissions to execute stored XSS attacks.
The Impact of CVE-2021-21649
The impact of this vulnerability includes the potential for attackers to execute malicious scripts within the context of a user's session, leading to unauthorized actions.
Technical Details of CVE-2021-21649
The technical details of CVE-2021-21649 revolve around the failure of Jenkins Dashboard View Plugin 2.15 and below to properly escape URLs in Image Dashboard Portlets, opening the door to stored XSS exploits.
Vulnerability Description
The vulnerability arises from the lack of URL escaping in Image Dashboard Portlets, allowing attackers to inject and execute malicious scripts.
Affected Systems and Versions
Systems running Jenkins Dashboard View Plugin versions less than or equal to 2.15 are affected, while version 2.12.1 remains unaffected.
Exploitation Mechanism
Exploiting CVE-2021-21649 involves attackers with View/Configure permission manipulating URLs referenced in Image Dashboard Portlets to launch stored XSS attacks.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-21649, immediate actions and long-term security practices are crucial.
Immediate Steps to Take
Users should update Jenkins Dashboard View Plugin to version 2.12.1 or apply patches provided by Jenkins to remediate the vulnerability.
Long-Term Security Practices
Implementing secure coding practices, regular security audits, and user permission reviews can enhance the overall security posture against such vulnerabilities.
Patching and Updates
Regularly apply security updates and patches released by Jenkins to address known vulnerabilities and strengthen the security of Jenkins Dashboard View Plugin installations.