CVE-2021-22865 : What You Need to Know
Learn about CVE-2021-22865, an access control vulnerability in GitHub Enterprise Server allowing unauthorized read access to private repository metadata. Find out the impact, affected versions, and mitigation steps.
A vulnerability in GitHub Enterprise Server allowed unauthorized read access to private repository metadata. This article provides an overview of CVE-2021-22865, including its impact, technical details, and mitigation steps.
Understanding CVE-2021-22865
This section delves into the specifics of the vulnerability to help users understand its implications.
What is CVE-2021-22865?
CVE-2021-22865 is an improper access control vulnerability in GitHub Enterprise Server, enabling access to private repository metadata via the REST API without proper permissions.
The Impact of CVE-2021-20657
The vulnerability could allow attackers to read private repository data via generated access tokens, affecting versions of GitHub Enterprise Server before 3.0.4.
Technical Details of CVE-2021-22865
This section elaborates on the technical aspects of the vulnerability for a deeper understanding.
Vulnerability Description
The flaw allowed access tokens from a GitHub App's web authentication flow to retrieve private repository metadata, circumventing necessary permissions.
Affected Systems and Versions
GitHub Enterprise Server versions prior to 3.0.4, including 2.22.10 and 2.21.18, were vulnerable to this unauthorized read access issue.
Exploitation Mechanism
Attackers could exploit this vulnerability by creating a GitHub App and prompting user authorization through the web authentication flow, accessing limited private repository data.
Mitigation and Prevention
This section outlines steps to mitigate and prevent exploitation of CVE-2021-22865.
Immediate Steps to Take
Users should update GitHub Enterprise Server to versions 3.0.4, 2.22.10, or 2.21.18 to address the vulnerability and enhance security.
Long-Term Security Practices
Practicing strong access control policies, monitoring access tokens, and promptly applying security patches can help prevent unauthorized access to private repository data.
Patching and Updates
Regularly updating GitHub Enterprise Server to the latest versions, following security best practices, and staying informed about potential security threats are crucial to maintaining system security.