CVE-2022-39207 : Vulnerability Insights and Analysis

Persistent XSS in OneDev

Understanding CVE-2022-39207

This CVE involves a persistent Cross-Site Scripting (XSS) vulnerability in OneDev, an open-source Git Server with CI/CD and Kanban capabilities. The issue allows attackers to execute arbitrary code on the server, potentially leading to severe security risks.

What is CVE-2022-20657?

OneDev, a self-hosted Git Server, is vulnerable to persistent XSS due to improper handling of build artifacts. Attackers can exploit this by injecting malicious HTML content into artifacts, enabling them to steal user sessions and gain unauthorized access.

The Impact of CVE-2022-20657

The vulnerability poses a medium-severity risk, with a CVSS base score of 5.4. Attackers can potentially elevate privileges, impersonate users, and even achieve arbitrary code execution on the server. Admins could inadvertently execute harmful commands through Server Shell Executors.

Technical Details of CVE-2022-20657

Vulnerability Description

The flaw arises from the unrestrictive serving of artifact files by OneDev's webserver, enabling XSS attacks when artifacts contain HTML.

Affected Systems and Versions

OneDev versions prior to 7.3.0 are impacted by this vulnerability.

Exploitation Mechanism

Attackers need to manipulate artifact content, typically by tampering with a project's build spec. User interaction is required, usually through a malicious link.

Mitigation and Prevention

To address CVE-2022-20657, users are strongly advised to upgrade to version 7.3.0. Additionally, implementing long-term security practices, immediate steps, and regular patching can help prevent XSS attacks and maintain system integrity.

Immediate Steps to Take

Users should upgrade OneDev to version 7.3.0 to mitigate the vulnerability.
Emphasize user awareness about clicking on suspicious links to prevent exploitation.

Long-Term Security Practices

Enforce secure coding practices to prevent XSS vulnerabilities.
Regularly monitor and audit project artifacts for malicious content.

Patching and Updates

Stay informed about security advisories and promptly apply patches released by OneDev to address known vulnerabilities.