CVE-2022-46257 : Vulnerability Insights and Analysis

An information disclosure vulnerability in GitHub Enterprise Server allowed unauthorized viewing of private repository names by adding them to a GitHub Actions runner group via the API. This CVE affected versions prior to 3.7 and was fixed in specific versions.

Understanding CVE-2022-46257

GitHub Enterprise Server had a flaw that exposed private repository names to unauthorized users via the UI, allowing them to be added to a GitHub Actions runner group.

What is CVE-2022-46257?

This CVE refers to an information disclosure vulnerability in GitHub Enterprise Server that revealed private repository names to unauthorized users who could guess repository IDs.

The Impact of CVE-2022-46257

The vulnerability allowed potential attackers to view private repository names, compromising confidentiality and potentially leading to unauthorized access.

Technical Details of CVE-2022-46257

The vulnerability allowed unauthorized disclosure of information, affecting GitHub Enterprise Server versions and requiring permission to modify GitHub Actions runner groups.

Vulnerability Description

The flaw enabled a user to view private repository names by adding them to a GitHub Actions runner group, even without direct access.

Affected Systems and Versions

GitHub Enterprise Server versions 3.3 to 3.6 were impacted, with fixed versions detailed as 3.3.17, 3.4.12, 3.5.9, and 3.6.5.

Exploitation Mechanism

To exploit this vulnerability, an attacker needed access to the GHES instance, permissions to modify GitHub Actions runner groups, and the ability to guess obfuscated repository IDs.

Mitigation and Prevention

GitHub promptly addressed the vulnerability and provided steps for immediate resolution and long-term security practices.

Immediate Steps to Take

Users are advised to update GitHub Enterprise Server to the patched versions (3.3.17, 3.4.12, 3.5.9, 3.6.5) to prevent unauthorized disclosure of private repository names.

Long-Term Security Practices

Regularly monitor for security updates and enforce proper access controls to prevent similar information disclosure incidents.

Patching and Updates

It is crucial to apply security patches promptly and keep software up to date to protect against known vulnerabilities.