CVE-2023-43651
📋 TL;DR
This vulnerability allows authenticated users of JumpServer to exploit MongoDB sessions through the WEB CLI interface to execute arbitrary commands, leading to remote code execution. Attackers can potentially gain root privileges on the system. All users running vulnerable versions of JumpServer are affected.
💻 Affected Systems
- JumpServer
📦 What is this software?
Jumpserver by Fit2cloud
Jumpserver by Fit2cloud
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with root access, allowing attackers to pivot to internal networks, steal sensitive data, and deploy persistent backdoors.
Likely Case
Unauthorized remote code execution on the JumpServer host, enabling credential theft, lateral movement, and data exfiltration.
If Mitigated
Limited impact if proper network segmentation and least privilege access controls are implemented, though the JumpServer host remains compromised.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once access is obtained. Technical details and proof-of-concept are publicly available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.28.20 or 3.7.1
Vendor Advisory: https://github.com/jumpserver/jumpserver/security/advisories/GHSA-4r5x-x283-wm96
Restart Required: Yes
Instructions:
1. Backup your JumpServer configuration and data. 2. Stop the JumpServer service. 3. Update to version 2.28.20 (for v2.x) or 3.7.1 (for v3.x) using your package manager or installation method. 4. Restart the JumpServer service. 5. Verify the update was successful.
🧯 If You Can't Patch
- Restrict access to JumpServer's WEB CLI interface to only trusted users and networks.
- Implement strict network segmentation to isolate JumpServer from critical systems.
🔍 How to Verify
Check if Vulnerable:
Check your JumpServer version. If it's below 2.28.20 (for v2.x) or 3.7.1 (for v3.x), you are vulnerable.Check Version:
jumpserver --version or check the web interface admin panel for version information.Verify Fix Applied:
After updating, verify the version is 2.28.20 or higher (for v2.x) or 3.7.1 or higher (for v3.x).📡 Detection & Monitoring
Log Indicators:
- Unusual MongoDB session activity through WEB CLI
- Suspicious command execution patterns in JumpServer logs
- Authentication logs showing unexpected user access to MongoDB resources
Network Indicators:
- Unexpected outbound connections from JumpServer host
- Anomalous traffic patterns to/from JumpServer's MongoDB port
SIEM Query:
source="jumpserver" AND (event="command_execution" OR event="mongodb_session") | stats count by user, command