CVE-2024-9784
📋 TL;DR
A critical buffer overflow vulnerability in D-Link DIR-619L B1 router's formResetStatistic function allows remote attackers to execute arbitrary code or crash the device. This affects all users of the vulnerable firmware version. Attackers can exploit this without authentication to potentially take full control of the router.
💻 Affected Systems
- D-Link DIR-619L B1
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, credential theft, network pivoting, and persistent backdoor installation.
Likely Case
Router crash/reboot causing denial of service, or limited code execution for network reconnaissance.
If Mitigated
Attack blocked at network perimeter with no internal access to vulnerable devices.
🎯 Exploit Status
Public exploit code exists in GitHub repository. The vulnerability requires no authentication and has straightforward exploitation.
🛠️ 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 from official site. 3. Log into router admin interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Wait for router to reboot.
🔧 Temporary Workarounds
Disable remote administration
allPrevent external access to router administration interface
Network segmentation
allIsolate router management interface to trusted network segment only
🧯 If You Can't Patch
- Replace affected router with supported model
- Implement strict firewall rules blocking all external access to router management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If version is 2.06 on DIR-619L B1 hardware, device is vulnerable.Check Version:
Log into router web interface and check System Status or Firmware sectionVerify Fix Applied:
Verify firmware version has changed from 2.06 to a newer version after update.📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to /goform/formResetStatistic
- Router crash/reboot logs
- Unusual outbound connections from router
Network Indicators:
- HTTP POST requests to router IP on port 80/443 with formResetStatistic in URL
- Unusual traffic patterns from router
SIEM Query:
source="router_logs" AND (url="/goform/formResetStatistic" OR message="crash" OR message="reboot")