CVE-2022-1813
📋 TL;DR
This CVE-2022-1813 is an OS command injection vulnerability in the rengine reconnaissance tool that allows attackers to execute arbitrary commands on the underlying operating system. It affects all users running rengine versions prior to 1.2.0, potentially leading to complete system compromise.
💻 Affected Systems
- rengine
📦 What is this software?
Rengine by Rengine Project
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with root-level access, data exfiltration, lateral movement, and persistent backdoor installation.
Likely Case
Unauthorized command execution leading to data theft, service disruption, and potential privilege escalation.
If Mitigated
Limited impact if proper network segmentation, least privilege, and input validation are implemented.
🎯 Exploit Status
The vulnerability is in the web interface and requires minimal technical skill to exploit. Public exploit details are available in the referenced bounty reports.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.2.0
Vendor Advisory: https://github.com/yogeshojha/rengine/commit/8277cec0f008a0451371a92e7e0bf082ab3f0c34
Restart Required: Yes
Instructions:
1. Backup current configuration and data. 2. Stop rengine service. 3. Update to version 1.2.0 or later using git pull or fresh installation. 4. Restart rengine service. 5. Verify the fix by checking version and testing functionality.
🔧 Temporary Workarounds
Network Isolation
linuxRestrict access to rengine web interface to trusted IP addresses only
iptables -A INPUT -p tcp --dport 8000 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 8000 -j DROP
Web Application Firewall
allDeploy WAF rules to block command injection patterns
🧯 If You Can't Patch
- Implement strict input validation and sanitization for all user inputs
- Run rengine in a containerized environment with minimal privileges
🔍 How to Verify
Check if Vulnerable:
Check rengine version: if version is less than 1.2.0, system is vulnerableCheck Version:
docker exec rengine python --version 2>/dev/null || grep version rengine/config.pyVerify Fix Applied:
Confirm version is 1.2.0 or higher and test that command injection attempts are properly blocked📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns in system logs
- Multiple failed authentication attempts followed by command execution
Network Indicators:
- Unusual outbound connections from rengine server
- Traffic patterns matching command injection payloads
SIEM Query:
source="rengine" AND (cmd.exe OR bash OR sh OR python) AND NOT expected_command