CVE-2024-9566
📋 TL;DR
A critical buffer overflow vulnerability in D-Link DIR-619L B1 routers allows remote attackers to execute arbitrary code by manipulating the 'next_page' parameter in the formDeviceReboot function. This affects all users of the vulnerable firmware version. Successful exploitation could lead to complete device compromise.
💻 Affected Systems
- D-Link DIR-619L B1
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full router compromise, persistent backdoor installation, network traffic interception, and lateral movement to connected devices.
Likely Case
Router crash/reboot causing service disruption, or remote code execution allowing attacker to modify router settings and intercept traffic.
If Mitigated
Denial of service from failed exploitation attempts if buffer overflow protections are present.
🎯 Exploit Status
Public exploit details available on GitHub, making exploitation straightforward for attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.dlink.com/
Restart Required: Yes
Instructions:
1. Check D-Link website for firmware updates. 2. If update available, download and install via router web interface. 3. Reboot router after update.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router administration interface
Network Segmentation
allIsolate router management interface to trusted network segment
🧯 If You Can't Patch
- Replace affected router with supported model
- Implement strict firewall rules blocking access to port 80/443 on router from untrusted networks
🔍 How to Verify
Check if Vulnerable:
Access router web interface, navigate to System Info or Status page, check firmware version matches 2.06Check Version:
curl -s http://router-ip/status.asp | grep -i firmwareVerify Fix Applied:
Check firmware version after update is different from 2.06📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to /goform/formDeviceReboot with long next_page parameters
- Router reboot logs without user action
Network Indicators:
- Unusual HTTP POST traffic to router port 80/443 with oversized parameters
- Traffic patterns suggesting router compromise
SIEM Query:
source="router_logs" AND (url="/goform/formDeviceReboot" AND content_length>1000)