CVE-2024-11047
📋 TL;DR
This critical vulnerability in D-Link DI-8003 routers allows remote attackers to execute arbitrary code via a stack-based buffer overflow in the upgrade_filter.asp file. Attackers can exploit this by manipulating the 'path' parameter to overflow the buffer and potentially gain full control of affected devices. All users of D-Link DI-8003 routers running version 16.07.16A1 are affected.
💻 Affected Systems
- D-Link DI-8003
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, data theft, network pivoting, and persistent backdoor installation.
Likely Case
Remote code execution allowing attackers to modify device configuration, intercept network traffic, or use device as botnet node.
If Mitigated
Denial of service or device crash if exploit fails but buffer overflow triggers.
🎯 Exploit Status
Public exploit code is available on GitHub, making exploitation straightforward for attackers. The vulnerability requires no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.dlink.com/
Restart Required: Yes
Instructions:
1. Check D-Link website for security advisories. 2. If patch available, download firmware update. 3. Backup configuration. 4. Upload firmware via web interface. 5. Reboot device. 6. Restore configuration if needed.
🔧 Temporary Workarounds
Network Segmentation
allIsolate DI-8003 devices from internet and restrict access to management interface
Access Control Lists
linuxImplement firewall rules to block external access to web management interface (typically port 80/443)
iptables -A INPUT -p tcp --dport 80 -s trusted_networks -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
🧯 If You Can't Patch
- Replace vulnerable devices with supported models
- Implement strict network segmentation and monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface: Login > Maintenance > Firmware Upgrade shows current versionCheck Version:
curl -k https://[router-ip]/info.asp | grep 'Firmware Version'Verify Fix Applied:
Verify firmware version is no longer 16.07.16A1 after update📡 Detection & Monitoring
Log Indicators:
- Multiple failed upgrade attempts
- Unusual POST requests to /upgrade_filter.asp
- Device reboot logs after buffer overflow
Network Indicators:
- HTTP POST requests to /upgrade_filter.asp with long path parameters
- Unusual outbound connections from router
SIEM Query:
source="router_logs" AND (url="/upgrade_filter.asp" OR message="*buffer*" OR message="*overflow*")