CVE-2024-0200
📋 TL;DR
An unsafe reflection vulnerability in GitHub Enterprise Server allows authenticated organization owners to execute arbitrary methods, potentially leading to remote code execution. This affects all GitHub Enterprise Server instances running versions prior to 3.12. The vulnerability requires an attacker to have organization owner privileges on the target instance.
💻 Affected Systems
- GitHub Enterprise Server
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full remote code execution on the GitHub Enterprise Server instance, allowing complete system compromise and data exfiltration.
Likely Case
Privilege escalation leading to unauthorized access to sensitive repositories, user data, and administrative functions.
If Mitigated
Limited impact due to strong access controls and monitoring, with only authorized organization owners potentially exploiting the vulnerability.
🎯 Exploit Status
Exploitation requires organization owner credentials and knowledge of reflection injection techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.8.13, 3.9.8, 3.10.5, 3.11.3, or 3.12+
Vendor Advisory: https://docs.github.com/en/enterprise-server@3.10/admin/release-notes#3.10.5
Restart Required: Yes
Instructions:
1. Backup your GitHub Enterprise Server instance. 2. Download the appropriate patched version from GitHub Enterprise. 3. Follow the upgrade instructions for your version. 4. Restart the instance after upgrade completion.
🔧 Temporary Workarounds
Restrict Organization Owner Access
allReduce the number of users with organization owner privileges to minimize attack surface.
Enhanced Monitoring
allImplement strict monitoring of organization owner account activities and API calls.
🧯 If You Can't Patch
- Implement strict least-privilege access controls for organization owner roles
- Deploy network segmentation to isolate GitHub Enterprise Server from critical systems
🔍 How to Verify
Check if Vulnerable:
Check your GitHub Enterprise Server version via the Management Console or SSH into the appliance and run 'ghe-version'Check Version:
ssh admin@your-ghes-instance 'ghe-version'Verify Fix Applied:
Verify version is 3.8.13, 3.9.8, 3.10.5, 3.11.3, or 3.12+ using 'ghe-version' command📡 Detection & Monitoring
Log Indicators:
- Unusual reflection API calls from organization owner accounts
- Suspicious method invocations in application logs
- Unexpected process executions from GitHub services
Network Indicators:
- Anomalous outbound connections from GitHub Enterprise Server
- Unexpected data exfiltration patterns
SIEM Query:
source="github-enterprise" AND (event_type="reflection_call" OR user_role="organization_owner") AND status="success"🔗 References
- https://docs.github.com/en/enterprise-server@3.10/admin/release-notes#3.10.5
- https://docs.github.com/en/enterprise-server@3.11/admin/release-notes#3.11.3
- https://docs.github.com/en/enterprise-server@3.8/admin/release-notes#3.8.13
- https://docs.github.com/en/enterprise-server@3.9/admin/release-notes#3.9.8
- https://docs.github.com/en/enterprise-server@3.10/admin/release-notes#3.10.5
- https://docs.github.com/en/enterprise-server@3.11/admin/release-notes#3.11.3
- https://docs.github.com/en/enterprise-server@3.8/admin/release-notes#3.8.13
- https://docs.github.com/en/enterprise-server@3.9/admin/release-notes#3.9.8
