CVE-2022-23741 Explained : Impact and Mitigation

An incorrect authorization vulnerability in GitHub Enterprise Server allowed a scoped user-to-server token to escalate to full admin/owner privileges.

Understanding CVE-2022-23741

This CVE highlights a security issue in GitHub Enterprise Server versions that could result in unauthorized escalation to full admin privileges.

What is CVE-2022-23741?

CVE-2022-23741 exposes a vulnerability in GitHub Enterprise Server that could be exploited by attackers with admin access to install a malicious GitHub App.

The Impact of CVE-2022-23741

The vulnerability allowed a scoped token to gain complete access, potentially leading to unauthorized administrative control over the server.

Technical Details of CVE-2022-23741

The vulnerability was identified in GitHub Enterprise Server, affecting versions 3.3.17, 3.4.12, 3.5.9, and 3.6.5.

Vulnerability Description

The flaw enabled a scoped user-to-server token to acquire full admin/owner privileges, elevating its permissions beyond intended limits.

Affected Systems and Versions

GitHub Enterprise Server versions 3.3 to 3.6 were impacted, with specific versions delineated as vulnerable.

Exploitation Mechanism

To exploit the vulnerability, an attacker needed admin access to install a malicious GitHub App, leveraging the incorrect authorization issue.

Mitigation and Prevention

Proactive measures are crucial to address and prevent such vulnerabilities from being exploited.

Immediate Steps to Take

Ensure that affected GitHub Enterprise Server instances are updated to secure versions immediately to mitigate the risk of unauthorized access.

Long-Term Security Practices

Enforce strict access control policies, regularly monitor for unauthorized activities, and educate users to prevent future security lapses.

Patching and Updates

GitHub released fixed versions 3.3.17, 3.4.12, 3.5.9, and 3.6.5 to address the vulnerability, underscoring the importance of timely updates and patch management.