CVE-2020-2163 : Security Advisory and Response

Jenkins 2.227 and earlier, LTS 2.204.5 and earlier improperly process HTML content of list view column headers, leading to a stored XSS vulnerability.

Understanding CVE-2020-2163

This CVE involves a security issue in Jenkins versions 2.227 and earlier, as well as LTS 2.204.5 and earlier, that allows for a stored XSS vulnerability.

What is CVE-2020-2163?

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Jenkins versions 2.227 and earlier, LTS 2.204.5 and earlier are affected
Vulnerability allows for stored XSS exploitation by users controlling column headers

The Impact of CVE-2020-2163

Malicious users can exploit the vulnerability to execute arbitrary scripts in the context of a user's browser
Attackers can potentially steal sensitive information, perform actions on behalf of users, or deface websites

Technical Details of CVE-2020-2163

This section provides more technical insights into the vulnerability.

Vulnerability Description

Jenkins versions 2.227 and earlier, LTS 2.204.5 and earlier mishandle HTML content in list view column headers
This mishandling leads to a stored XSS vulnerability

Affected Systems and Versions

Jenkins versions 2.227 and earlier
LTS 2.204.5 and earlier

Exploitation Mechanism

Attackers who can control column headers can inject malicious scripts
Scripts are executed in the context of the user's browser, posing a significant security risk

Mitigation and Prevention

Protecting systems from CVE-2020-2163 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Jenkins to a patched version that addresses the XSS vulnerability
Implement strict input validation to prevent malicious script injection

Long-Term Security Practices

Regularly monitor and update Jenkins and its plugins to the latest secure versions
Educate users on safe practices to prevent XSS attacks

Patching and Updates

Apply security patches provided by Jenkins to fix the vulnerability
Stay informed about security advisories and promptly apply recommended updates