CVE-2024-4699
📋 TL;DR
This critical vulnerability in D-Link DAR-8000-10 devices allows remote attackers to execute arbitrary code through deserialization attacks targeting the /importhtml.php file. It affects all DAR-8000-10 devices running firmware up to September 22, 2023. The product is end-of-life and no longer supported by the vendor.
💻 Affected Systems
- D-Link DAR-8000-10
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise leading to ransomware deployment, data exfiltration, or integration into botnets
Likely Case
Remote code execution allowing attackers to install backdoors, pivot to internal networks, or disrupt operations
If Mitigated
Limited impact if device is isolated behind firewalls with strict network controls
🎯 Exploit Status
Public exploit details available on GitHub. Remote exploitation without authentication makes weaponization highly probable.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: None available
Vendor Advisory: https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10354
Restart Required: No
Instructions:
No patch available. Vendor recommends retiring and replacing all affected devices immediately.
🔧 Temporary Workarounds
Block access to vulnerable endpoint
linuxUse firewall rules to block all access to /importhtml.php
iptables -A INPUT -p tcp --dport 80 -m string --string "/importhtml.php" --algo bm -j DROP
iptables -A INPUT -p tcp --dport 443 -m string --string "/importhtml.php" --algo bm -j DROP
Network segmentation
allIsolate DAR-8000-10 devices in separate VLAN with strict access controls
🧯 If You Can't Patch
- Immediately remove affected devices from internet-facing positions
- Implement strict network segmentation and monitor all traffic to/from affected devices
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface or SSH. If version is 20230922 or earlier, device is vulnerable.Check Version:
Check web interface at System > Firmware or via SSH: cat /etc/versionVerify Fix Applied:
No fix available. Only verification is device replacement with supported hardware.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /importhtml.php with SQL parameters
- Unusual process execution from web server context
- Failed authentication attempts followed by successful /importhtml.php access
Network Indicators:
- POST requests to /importhtml.php containing serialized data
- Outbound connections from DAR-8000-10 to suspicious IPs
- Unusual traffic patterns from device management interfaces
SIEM Query:
source="web_logs" AND uri="/importhtml.php" AND (method="POST" OR params CONTAINS "sql=")🔗 References
- https://github.com/I-Schnee-I/cev/blob/main/D-LINK-DAR-8000-10_rce_importhtml.md
- https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10354
- https://vuldb.com/?ctiid.263747
- https://vuldb.com/?id.263747
- https://vuldb.com/?submit.331311
- https://github.com/I-Schnee-I/cev/blob/main/D-LINK-DAR-8000-10_rce_importhtml.md
- https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10354
- https://vuldb.com/?ctiid.263747
- https://vuldb.com/?id.263747
- https://vuldb.com/?submit.331311
