CVE-2020-2162 : Vulnerability Insights and Analysis
Learn about CVE-2020-2162 affecting Jenkins versions 2.227 and earlier, LTS 2.204.5 and earlier, leading to a stored XSS vulnerability. Find mitigation steps and best practices for enhanced security.
Jenkins 2.227 and earlier, LTS 2.204.5 and earlier versions are affected by a stored XSS vulnerability due to the lack of Content-Security-Policy headers for uploaded files.
Understanding CVE-2020-2162
This CVE record highlights a security issue in Jenkins versions that could lead to cross-site scripting (XSS) attacks.
What is CVE-2020-2162?
CVE-2020-2162 is a vulnerability in Jenkins versions 2.227 and earlier, LTS 2.204.5 and earlier, where uploaded files lack proper Content-Security-Policy headers, making them susceptible to stored XSS attacks.
The Impact of CVE-2020-2162
This vulnerability allows attackers to execute malicious scripts in the context of a user's session, potentially leading to unauthorized actions, data theft, or further compromise of the Jenkins environment.
Technical Details of CVE-2020-2162
Jenkins 2.227 and earlier, LTS 2.204.5 and earlier are affected by the following:
Vulnerability Description
- Stored XSS vulnerability due to missing Content-Security-Policy headers for uploaded files.
Affected Systems and Versions
- Jenkins versions 2.227 and earlier
- LTS versions 2.204.5 and earlier
Exploitation Mechanism
- Attackers can upload malicious files as parameters to a build, exploiting the lack of Content-Security-Policy headers to execute scripts in users' browsers.
Mitigation and Prevention
It is crucial to take immediate and long-term security measures to address CVE-2020-2162:
Immediate Steps to Take
- Upgrade Jenkins to a patched version that includes proper Content-Security-Policy headers for uploaded files.
- Monitor and restrict file uploads to prevent malicious content.
Long-Term Security Practices
- Implement regular security assessments and code reviews to identify and mitigate vulnerabilities.
- Educate users on safe file handling practices to prevent uploading malicious content.
Patching and Updates
- Stay informed about security advisories from Jenkins and promptly apply patches to secure the environment against known vulnerabilities.