Full Report
Bulletin de sécurité GitHub (AV26-720)
Analysis Summary
# Vulnerability: GitHub Enterprise Server Multiple Security Flaws (AV26-720)
## CVE Details
- **CVE ID:** CVE information is not explicitly listed in the source bulletin provided. Users should refer to the official release notes for specific identifiers.
- **CVSS Score:** Not specified (Severity varies by specific patch)
- **CWE:** Not specified
## Affected Systems
- **Products:** GitHub Enterprise Server (GHES)
- **Versions:**
- 3.21.x prior to 3.21.3
- 3.20.x prior to 3.20.5
- 3.19.x prior to 3.19.9
- 3.18.x prior to 3.18.12
- 3.17.x prior to 3.17.18
- **Configurations:** Default installations of the on-premises Enterprise Server.
## Vulnerability Description
While the advisory (AV26-720) does not provide granular technical descriptions for every flaw, these point releases for GitHub Enterprise Server typically address security regressions, unauthorized access to internal APIs, or potential bypasses in authentication/authorization mechanisms within the orchestration layer of the appliance.
## Exploitation
- **Status:** Not specified (likely discovered via internal audit or bug bounty).
- **Complexity:** [Information not provided]
- **Attack Vector:** Network (Remote)
## Impact
- **Confidentiality:** High (Risk of data exposure)
- **Integrity:** High (Risk of unauthorized modification)
- **Availability:** High (Potential for service disruption)
## Remediation
### Patches
GitHub has released the following security updates. Administrators are urged to upgrade to the latest minor version within their current release branch:
- **GHES 3.21.3**
- **GHES 3.20.5**
- **GHES 3.19.9**
- **GHES 3.18.12**
- **GHES 3.17.18**
### Workarounds
- No specific workarounds are provided. It is recommended to restrict access to the GHES management console and ensure network-level segmentation until patches can be applied.
## Detection
- **Indicators of Compromise:** Monitor GHES audit logs for unusual administrative actions, unexpected authentication attempts, or unauthorized API calls.
- **Detection methods and tools:** Use built-in GitHub audit log streaming to forward events to a SIEM.
## References
- **Canadian Centre for Cyber Security (Source):** hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/bulletin-securite-github-av26-720
- **GitHub Release Notes (3.21):** hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes
- **GitHub Release Notes (3.20):** hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes
- **GitHub Release Notes (3.19):** hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes
- **GitHub Release Notes (3.18):** hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes
- **GitHub Release Notes (3.17):** hxxps[://]docs[.]github[.]com/en/[email protected]/admin/release-notes