CVE-2020-2207 : Vulnerability Insights and Analysis

Jenkins VncViewer Plugin 1.7 and earlier versions are affected by a reflected cross-site scripting (XSS) vulnerability due to improper handling of parameter values.

Understanding CVE-2020-2207

This CVE involves a security issue in the Jenkins VncViewer Plugin that could be exploited by attackers to execute XSS attacks.

What is CVE-2020-2207?

CVE-2020-2207 is a vulnerability in Jenkins VncViewer Plugin versions 1.7 and earlier, allowing for reflected cross-site scripting attacks.

The Impact of CVE-2020-2207

The vulnerability could be exploited by malicious actors to inject and execute arbitrary scripts in the context of a user's web browser, potentially leading to unauthorized actions or data theft.

Technical Details of CVE-2020-2207

The technical aspects of the vulnerability in Jenkins VncViewer Plugin.

Vulnerability Description

The issue arises from the lack of proper escaping of a parameter value in the checkVncServ form validation endpoint, enabling XSS attacks.

Affected Systems and Versions

Product: Jenkins VncViewer Plugin
Vendor: Jenkins project
Versions Affected: <= 1.7 (unspecified version type)

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious input that, when processed by the affected plugin, gets executed in the user's browser, leading to XSS attacks.

Mitigation and Prevention

Measures to address and prevent the exploitation of CVE-2020-2207.

Immediate Steps to Take

Update Jenkins VncViewer Plugin to a patched version that addresses the XSS vulnerability.
Monitor for any signs of unauthorized script execution on the affected systems.

Long-Term Security Practices

Regularly update and patch all software components to prevent known vulnerabilities.
Implement input validation and output encoding to mitigate XSS risks in web applications.

Patching and Updates

Ensure timely application of security patches and updates to Jenkins VncViewer Plugin to mitigate the risk of XSS attacks.