CVE-2020-19001
📋 TL;DR
CVE-2020-19001 is a command injection vulnerability in Simiki v1.6.2.1 and earlier that allows remote attackers to execute arbitrary system commands via the config.py component. This enables complete system compromise of affected Simiki installations. All users running vulnerable Simiki versions are affected.
💻 Affected Systems
- Simiki
📦 What is this software?
Simiki by Simiki Project
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with root-level access, data theft, ransomware deployment, and persistent backdoor installation
Likely Case
Web server compromise leading to data exfiltration, cryptocurrency mining, or use as attack pivot point
If Mitigated
Limited impact with proper network segmentation, minimal privileges, and command execution restrictions
🎯 Exploit Status
Exploit details are publicly available in GitHub issues, making weaponization straightforward
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v1.6.2.2 and later
Vendor Advisory: https://github.com/tankywoo/simiki/issues/123
Restart Required: Yes
Instructions:
1. Backup your Simiki data and configuration. 2. Update Simiki using pip: 'pip install --upgrade simiki'. 3. Verify version: 'simiki --version'. 4. Restart your Simiki service or web server.
🔧 Temporary Workarounds
Network Isolation
linuxRestrict network access to Simiki instances using firewall rules
iptables -A INPUT -p tcp --dport [SIMIKI_PORT] -s [TRUSTED_NETWORK] -j ACCEPT
iptables -A INPUT -p tcp --dport [SIMIKI_PORT] -j DROP
Process Sandboxing
linuxRun Simiki with minimal privileges using containerization or restricted user accounts
docker run --read-only --cap-drop=ALL -u nobody simiki
🧯 If You Can't Patch
- Immediately isolate affected systems from internet access and critical internal networks
- Implement strict network monitoring and IDS/IPS rules to detect command injection attempts
🔍 How to Verify
Check if Vulnerable:
Check Simiki version: 'simiki --version' or 'pip show simiki'. If version is 1.6.2.1 or earlier, system is vulnerable.Check Version:
simiki --version || pip show simiki | grep VersionVerify Fix Applied:
After update, verify version is 1.6.2.2 or later: 'simiki --version'. Test functionality remains intact.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns in system logs
- Suspicious Python subprocess calls
- Unexpected system command execution from web process
Network Indicators:
- HTTP requests containing shell metacharacters or command injection payloads
- Outbound connections from Simiki process to unexpected destinations
SIEM Query:
source="web_logs" AND (url="*;*" OR url="*|*" OR url="*`*" OR url="*$(*" OR url="*%0A*" OR url="*%0D*")