CVE-2024-42905
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary commands on Beijing Digital China Cloud Technology DCME-320 devices via the getVar function in the ping.php file. Successful exploitation grants device administrator privileges. Organizations using DCME-320 v.7.4.12.60 are affected.
💻 Affected Systems
- Beijing Digital China Cloud Technology Co., Ltd. DCME-320
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to network infiltration, data exfiltration, and use as pivot point for lateral movement.
Likely Case
Unauthorized administrative access allowing configuration changes, service disruption, and credential harvesting.
If Mitigated
Limited impact if device is isolated, monitored, and has strict network controls.
🎯 Exploit Status
Public GitHub repository contains exploit details and proof-of-concept. Simple HTTP request with crafted parameters triggers command execution.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Monitor vendor website for security updates. Consider upgrading to newer firmware versions if available.
🔧 Temporary Workarounds
Remove vulnerable file
linuxDelete or rename the vulnerable ping.php file to prevent exploitation
rm /code/function/system/tool/ping.php
mv /code/function/system/tool/ping.php /code/function/system/tool/ping.php.disabled
Restrict web interface access
linuxLimit access to device management interface using firewall rules
iptables -A INPUT -p tcp --dport 80 -s trusted_ip -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s trusted_ip -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
🧯 If You Can't Patch
- Isolate device in separate VLAN with strict network segmentation
- Implement web application firewall (WAF) with command injection protection rules
🔍 How to Verify
Check if Vulnerable:
Check if file exists: ls -la /code/function/system/tool/ping.php. Test with curl: curl -X POST http://device-ip/code/function/system/tool/ping.php -d 'var=test;id'Check Version:
Check web interface or use: cat /etc/version | grep DCMEVerify Fix Applied:
Confirm ping.php file is removed or renamed. Test exploitation attempt returns error or no command execution.📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to /code/function/system/tool/ping.php
- Unusual command execution in system logs
- Multiple failed authentication attempts followed by successful ping.php access
Network Indicators:
- HTTP traffic to ping.php endpoint with suspicious parameters
- Outbound connections from device to unexpected destinations
SIEM Query:
source="device_logs" AND (url="/code/function/system/tool/ping.php" OR cmd="ping.php")