CVE-2020-2136 Explained : Impact and Mitigation
Learn about CVE-2020-2136 affecting Jenkins Git Plugin versions <= 4.2.0, allowing stored cross-site scripting attacks. Find mitigation steps and best practices for enhanced security.
Jenkins Git Plugin 4.2.0 and earlier versions are affected by a stored cross-site scripting vulnerability due to improper handling of error messages in the repository URL for Microsoft TFS field form validation.
Understanding CVE-2020-2136
This CVE record highlights a security issue in the Jenkins Git Plugin that could be exploited by attackers for cross-site scripting attacks.
What is CVE-2020-2136?
CVE-2020-2136 is a vulnerability in Jenkins Git Plugin versions 4.2.0 and earlier, allowing stored cross-site scripting attacks through unescaped error messages in the repository URL for Microsoft TFS field form validation.
The Impact of CVE-2020-2136
The vulnerability could be exploited by malicious actors to execute arbitrary scripts in the context of a user's browser, potentially leading to unauthorized actions or data theft.
Technical Details of CVE-2020-2136
The technical aspects of this CVE include:
Vulnerability Description
- Jenkins Git Plugin 4.2.0 and earlier versions do not properly escape error messages, leading to a stored cross-site scripting vulnerability.
Affected Systems and Versions
- Product: Jenkins Git Plugin
- Vendor: Jenkins project
- Versions Affected: <= 4.2.0
Exploitation Mechanism
- Attackers can exploit this vulnerability by injecting malicious scripts into the repository URL for Microsoft TFS field form validation, which are then executed in the context of the user's browser.
Mitigation and Prevention
To address CVE-2020-2136, consider the following steps:
Immediate Steps to Take
- Upgrade Jenkins Git Plugin to a version beyond 4.2.0 to mitigate the vulnerability.
- Implement input validation mechanisms to sanitize user inputs and prevent script injections.
Long-Term Security Practices
- Regularly monitor and update plugins and software components to address security vulnerabilities promptly.
- Educate users and developers on secure coding practices to prevent cross-site scripting and other common web vulnerabilities.
Patching and Updates
- Stay informed about security advisories and patches released by Jenkins project to apply necessary updates and fixes promptly.