Full Report
GitHub security advisory (AV26-783)
Analysis Summary
# Vulnerability: Multiple Vulnerabilities in GitHub Enterprise Server (GHES)
## CVE Details
*Note: The specific CVE identifiers were not listed in the provided summary text; however, based on the GitHub advisory (AV26-783) and version numbers provided:*
- **CVE ID:** [Pending/Multiple] (Refer to specific release notes for individual CVE mappings)
- **CVSS Score:** Not explicitly provided in the summary (Typically High to Critical for GHES updates)
- **CWE:** Often includes Injection, Broken Access Control, or Privilege Escalation in these release cycles.
## Affected Systems
- **Products:** GitHub Enterprise Server (GHES)
- **Versions:**
- 3.17.0 prior to 3.17.16 and 3.17.19
- 3.18.0 prior to 3.18.10 and 3.18.13
- 3.19.0 prior to 3.19.7 and 3.19.10
- 3.20.0 prior to 3.20.3 and 3.20.6
- 3.21.0 prior to 3.21.4
- **Configurations:** Self-hosted instances of GitHub Enterprise Server.
## Vulnerability Description
The advisory indicates multiple security vulnerabilities addressed in the maintenance releases of GitHub Enterprise Server. These flaws typically involve security regressions, potential for unauthorized access to repository metadata, or vulnerabilities in underlying services bundled with the Enterprise appliance (such as Management Console components or internal API endpoints).
## Exploitation
- **Status:** Not specified (Assume PoC may exist for certain sub-components depending on the specific CVE).
- **Complexity:** Varies by specific CVE (Usually Low to Medium).
- **Attack Vector:** Network (Most GHES vulnerabilities are reachable via the web interface or API).
## Impact
- **Confidentiality:** High (Potential access to private code and metadata).
- **Integrity:** High (Potential for unauthorized code modification).
- **Availability:** Medium to High (Potential for service disruption).
## Remediation
### Patches
The Cyber Centre recommends updating to the latest patched versions immediately:
- **GHES 3.17:** Update to 3.17.16 or 3.17.19
- **GHES 3.18:** Update to 3.18.10 or 3.18.13
- **GHES 3.19:** Update to 3.19.7 or 3.19.10
- **GHES 3.20:** Update to 3.20.3 or 3.20.6
- **GHES 3.21:** Update to 3.21.4
### Workarounds
- No specific workarounds are provided. Patching the appliance is the standard remediation for GitHub Enterprise Server.
## Detection
- Monitor GHES audit logs for unusual administrative actions or unauthorized API calls.
- Review Management Console logs for unexpected configuration changes.
- Use built-in GitHub health checks to ensure system integrity.
## References
- hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes
- hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes
- hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes
- hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes
- hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes
- hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/github-security-advisory-av26-783