CVE-2021-22867 : Vulnerability Insights and Analysis
Discover how the CVE-2021-22867 path traversal vulnerability in GitHub Enterprise Server allowed unauthorized access to server files through GitHub Pages configuration. Learn about affected versions and mitigation steps.
A path traversal vulnerability was identified in GitHub Enterprise Server that allowed attackers to read files on the instance by exploiting GitHub Pages configuration options. This CVE affects versions prior to 3.1.3 and was addressed in versions 3.1.3, 3.0.11, and 2.22.17. The vulnerability required permissions to create and build GitHub Pages sites.
Understanding CVE-2021-22867
This CVE highlights a path traversal vulnerability in GitHub Enterprise Server related to unsafe configuration options in GitHub Pages.
What is CVE-2021-22867?
A path traversal vulnerability in GitHub Enterprise Server enabled unauthorized reading of files on the instance through specific GitHub Pages configuration settings.
The Impact of CVE-2021-22867
The vulnerability could be exploited by malicious actors with permissions to create and build GitHub Pages sites, potentially leading to unauthorized access to sensitive information on the server.
Technical Details of CVE-2021-22867
This section provides specifics about the vulnerability's description, affected systems, versions, and the exploitation mechanism.
Vulnerability Description
The vulnerability stemmed from inadequate restrictions on user-controlled configuration options utilized by GitHub Pages, allowing unauthorized access to server files.
Affected Systems and Versions
All versions of GitHub Enterprise Server prior to 3.1.3 were affected. The vulnerability was resolved in versions 3.1.3, 3.0.11, and 2.22.17.
Exploitation Mechanism
To exploit the CVE-2021-22867 vulnerability, an attacker needed permission to develop and execute GitHub Pages sites on the compromised GitHub Enterprise Server instance.
Mitigation and Prevention
Learn how to protect your systems and prevent potential security breaches.
Immediate Steps to Take
Apply the necessary patches and updates to GitHub Enterprise Server to mitigate the risk of exploitation.
Long-Term Security Practices
Establish stringent access controls and ensure regular security audits to identify and address vulnerabilities promptly.
Patching and Updates
Regularly update GitHub Enterprise Server to the latest versions to receive security patches and prevent vulnerabilities.