Full Report
GitHub security advisory (AV26-246)
Analysis Summary
# Vulnerability: GitHub Enterprise Server Multiple Security Flaws
## CVE Details
*Note: The specific CVE identifiers were not enumerated in the source summary (AV26-246); however, these advisories typically address High to Medium severity security flaws within the enterprise infrastructure.*
- **CVE ID:** Not explicitly listed in source
- **CVSS Score:** N/A (Severity varies by specific flaw)
- **CWE:** N/A
## Affected Systems
- **Products:** GitHub Enterprise Server (GHES)
- **Versions:**
- 3.19.x prior to 3.19.4
- 3.18.x prior to 3.18.7
- 3.17.x prior to 3.17.13
- 3.16.x prior to 3.16.16
- **Configurations:** Default installations of the on-premises GHES instances.
## Vulnerability Description
While the specific technical details of the flaws are contained within the release notes for each version, these security advisories for GHES typically address vulnerabilities such as:
- Improper access control in management consoles.
- Potential for unauthorized data access via API endpoints.
- Vulnerabilities in underlying dependencies (e.g., Ruby on Rails, Node.js).
- Protection against SSRF (Server-Side Request Forgery) or OS Command Injection within the enterprise environment.
## Exploitation
- **Status:** Not reported as exploited in the wild (based on standard disclosure at time of release).
- **Complexity:** Usually Low to Medium.
- **Attack Vector:** Network (External or Internal depending on instance exposure).
## Impact
- **Confidentiality:** Potential for High (Unauthorized access to repositories).
- **Integrity:** Potential for High (Unauthorized code modification).
- **Availability:** Potential for Medium (Service disruption).
## Remediation
### Patches
GitHub has released the following stable versions to address these vulnerabilities. Administrators should upgrade to one of these versions immediately:
- **GHES 3.19.4**
- **GHES 3.18.7**
- **GHES 3.17.13**
- **GHES 3.16.16**
### Workarounds
- There are no known effective workarounds that replace the need for patching.
- Restrict network access to the GHES instance to authorized IP ranges to limit the attack surface until patching is complete.
## Detection
- **Indicators of Compromise:** Monitor management console logs for unusual administrative actions or unauthorized SSH access attempts.
- **Detection methods:** Utilize internal audit logs provided within the GitHub Enterprise Shell and Administrative dashboard to identify anomalous API requests.
## References
- Canadian Centre for Cyber Security Advisory: hxxps[://]www.cyber.gc.ca/en/alerts-advisories/github-security-advisory-av26-246
- GitHub Enterprise Server Release Notes: hxxps[://]docs.github.com/en/[email protected]/admin/release-notes
- GitHub Enterprise Server Release Notes: hxxps[://]docs.github.com/en/[email protected]/admin/release-notes
- GitHub Enterprise Server Release Notes: hxxps[://]docs.github.com/en/[email protected]/admin/release-notes
- GitHub Enterprise Server Release Notes: hxxps[://]docs.github.com/en/[email protected]/admin/release-notes