CVE-2024-52780
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on affected DCME devices via the /function/system/basic/mgmt_edit.php endpoint. Attackers can potentially take full control of vulnerable systems. Organizations using DCME-320, DCME-520, DCME-320-L, or DCME-720 devices with vulnerable firmware versions are affected.
💻 Affected Systems
- DCME-320
- DCME-520
- DCME-320-L
- DCME-720
📦 What is this software?
Dcme 320 Firmware by Dcnetworks
Dcme 520 Firmware by Dcnetworks
Dcme 720 Firmware by Dcnetworks
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to install persistent backdoors, exfiltrate sensitive data, pivot to internal networks, and disrupt critical operations.
Likely Case
Attackers gain shell access to vulnerable devices, enabling credential theft, network reconnaissance, and lateral movement within the environment.
If Mitigated
With proper network segmentation and access controls, impact is limited to the compromised device only, preventing lateral movement.
🎯 Exploit Status
The vulnerability appears to be unauthenticated and trivial to exploit based on the technical details in the reference. Public exploit code exists, making weaponization highly probable.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
No official patch information available. Check with device vendor for firmware updates. If updates exist, download from vendor portal and apply following vendor's firmware upgrade procedures.
🔧 Temporary Workarounds
Block Access to Vulnerable Endpoint
linuxUse web application firewall or network firewall to block access to /function/system/basic/mgmt_edit.php
iptables -A INPUT -p tcp --dport 80 -m string --string "/function/system/basic/mgmt_edit.php" --algo bm -j DROP
iptables -A INPUT -p tcp --dport 443 -m string --string "/function/system/basic/mgmt_edit.php" --algo bm -j DROP
Restrict Network Access
linuxLimit access to DCME management interfaces to trusted IP addresses only
iptables -A INPUT -p tcp --dport 80 -s TRUSTED_IP_RANGE -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -s TRUSTED_IP_RANGE -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP
🧯 If You Can't Patch
- Isolate affected devices in a separate network segment with strict firewall rules preventing outbound connections
- Disable web management interface if not required and use alternative management methods
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface (System > About) or SSH connection and compare against affected versionsCheck Version:
ssh admin@device_ip 'cat /etc/version' or check via web interface at http(s)://device_ipVerify Fix Applied:
Verify firmware version is above affected ranges. Test if /function/system/basic/mgmt_edit.php endpoint is accessible and returns expected error or is blocked.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /function/system/basic/mgmt_edit.php with suspicious parameters
- Unusual process execution or system command activity in device logs
- Failed authentication attempts followed by successful exploitation
Network Indicators:
- HTTP POST requests to mgmt_edit.php with encoded payloads
- Outbound connections from DCME devices to suspicious external IPs
- Unusual traffic patterns from management interfaces
SIEM Query:
source="dcme_logs" AND (url="/function/system/basic/mgmt_edit.php" OR cmd="*sh*" OR process="*bash*")