CVE-2023-0671
📋 TL;DR
This CVE describes a code injection vulnerability in the Froxlor server management panel that allows attackers to execute arbitrary code on affected systems. The vulnerability affects all Froxlor installations prior to version 2.0.10. Attackers can exploit this to gain control of the server running Froxlor.
💻 Affected Systems
- froxlor/froxlor
📦 What is this software?
Froxlor by Froxlor
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise leading to data theft, ransomware deployment, lateral movement within the network, and persistent backdoor installation.
Likely Case
Unauthorized code execution leading to web server compromise, data exfiltration, and potential privilege escalation to root/system level.
If Mitigated
Limited impact due to network segmentation, minimal privileges, and proper input validation controls.
🎯 Exploit Status
Exploit details are publicly available in the referenced commits and bounty reports. Authentication is required to reach the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.0.10
Vendor Advisory: https://github.com/froxlor/froxlor/commit/0034681412057fef2dfe9cce9f8a6e3321f52edc
Restart Required: No
Instructions:
1. Backup your Froxlor configuration and database. 2. Update Froxlor to version 2.0.10 or later using your package manager or manual update. 3. Verify the update completed successfully. 4. Clear any cached files if applicable.
🔧 Temporary Workarounds
Input Validation Enhancement
linuxImplement additional input validation and sanitization for user-controlled parameters
Network Restriction
linuxRestrict access to Froxlor administration interface to trusted IP addresses only
iptables -A INPUT -p tcp --dport [FROXLOR_PORT] -s [TRUSTED_IP] -j ACCEPT
iptables -A INPUT -p tcp --dport [FROXLOR_PORT] -j DROP
🧯 If You Can't Patch
- Implement strict network access controls to limit Froxlor access to trusted IPs only
- Deploy a web application firewall (WAF) with code injection protection rules
🔍 How to Verify
Check if Vulnerable:
Check Froxlor version: grep 'version' /var/www/froxlor/lib/version.php or check Froxlor admin panel dashboardCheck Version:
grep "\$version" /var/www/froxlor/lib/version.php | head -1Verify Fix Applied:
Verify version is 2.0.10 or higher and check that the vulnerable code patterns from the commit are no longer present📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to Froxlor admin endpoints
- Suspicious PHP code execution in web server logs
- Unexpected system command execution
Network Indicators:
- Unusual outbound connections from Froxlor server
- Traffic patterns indicating data exfiltration
SIEM Query:
source="froxlor_access.log" AND (method="POST" AND uri="/admin/*" AND (user_agent="*curl*" OR user_agent="*wget*" OR size>100000))