Vulnerability Description
A remote code execution vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. User-controlled configuration options used by GitHub Pages were not sufficiently restricted and made it possible to override environment variables leading to code execution on the GitHub Enterprise Server instance. To exploit this vulnerability, an attacker would need permission to create and build a GitHub Pages site on the GitHub Enterprise Server instance. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.0.3 and was fixed in 3.0.3, 2.22.9, and 2.21.17. This vulnerability was reported via the GitHub Bug Bounty program.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Github | Enterprise Server | >= 2.21.0, < 2.21.17 |
Related Weaknesses (CWE)
References
- https://docs.github.com/en/enterprise-server%402.21/admin/release-notes#2.21.17
- https://docs.github.com/en/enterprise-server%402.22/admin/release-notes#2.22.9
- https://docs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.3
- https://docs.github.com/en/enterprise-server%402.21/admin/release-notes#2.21.17
- https://docs.github.com/en/enterprise-server%402.22/admin/release-notes#2.22.9
- https://docs.github.com/en/enterprise-server%403.0/admin/release-notes#3.0.3
FAQ
What is CVE-2021-22864?
CVE-2021-22864 is a vulnerability with a CVSS score of 8.8 (HIGH). A remote code execution vulnerability was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. User-controlled configuration options used by GitHub Pages w...
How severe is CVE-2021-22864?
CVE-2021-22864 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-22864?
Check the references section above for vendor advisories and patch information. Affected products include: Github Enterprise Server.