CVE-2022-3210
📋 TL;DR
This vulnerability allows attackers on the same network to execute arbitrary commands on D-Link DIR-2150 routers without authentication. The flaw exists in the xupnpd service which improperly validates user input before executing system commands. Only D-Link DIR-2150 routers running firmware version 4.0.1 are affected.
💻 Affected Systems
- D-Link DIR-2150
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete router compromise allowing attacker to intercept all network traffic, install persistent malware, pivot to internal network devices, and disable security controls.
Likely Case
Router takeover enabling DNS hijacking, credential theft from connected devices, and installation of backdoors for persistent access.
If Mitigated
Limited impact if service is disabled or network segmentation prevents access to port 4044.
🎯 Exploit Status
ZDI published detailed advisory with exploitation details. Simple command injection via crafted requests to port 4044.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to latest firmware (check D-Link support site)
Vendor Advisory: https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10304
Restart Required: Yes
Instructions:
1. Log into router admin interface. 2. Navigate to firmware update section. 3. Download latest firmware from D-Link support site. 4. Upload and apply firmware update. 5. Reboot router.
🔧 Temporary Workarounds
Disable xupnpd service
linuxStop and disable the vulnerable xupnpd service on port 4044
killall xupnpd
chmod -x /usr/bin/xupnpd
Block port 4044 with firewall
linuxPrevent access to the vulnerable service using router firewall rules
iptables -A INPUT -p tcp --dport 4044 -j DROP
🧯 If You Can't Patch
- Segment router management interface to isolated VLAN
- Implement network access controls to restrict who can reach port 4044
🔍 How to Verify
Check if Vulnerable:
Check if port 4044 is listening: 'netstat -tlnp | grep 4044' or 'nmap -p 4044 <router_ip>'Check Version:
Check router web interface or run 'cat /etc/version' via SSH if enabledVerify Fix Applied:
Verify port 4044 is no longer listening and check firmware version matches patched release📡 Detection & Monitoring
Log Indicators:
- Unusual process execution from xupnpd
- Failed authentication attempts on port 4044
- Suspicious commands in system logs
Network Indicators:
- Unexpected connections to port 4044
- Abnormal outbound traffic from router
- DNS queries to suspicious domains
SIEM Query:
source="router" dest_port=4044 AND (command="*" OR process="xupnpd")