CVE-2024-9910
📋 TL;DR
This critical buffer overflow vulnerability in D-Link DIR-619L routers allows remote attackers to execute arbitrary code by manipulating the curTime parameter in the formSetPassword function. Attackers can exploit this without authentication to potentially take full control of affected devices. Only DIR-619L B1 firmware version 2.06 is confirmed affected.
💻 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, persistent backdoor installation, credential theft, and use as pivot point into internal networks.
Likely Case
Remote code execution allowing attackers to modify device configuration, intercept network traffic, or join botnets.
If Mitigated
Limited impact if device is behind firewall with restricted WAN access and proper network segmentation.
🎯 Exploit Status
Public exploit code exists in GitHub repository. Attack requires sending specially crafted HTTP request to /goform/formSetPassword endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.dlink.com/
Restart Required: No
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. Verify version after reboot.
🔧 Temporary Workarounds
Disable WAN Management Access
allPrevent remote exploitation by disabling router administration from WAN/Internet interface
Network Segmentation
allIsolate router management interface to separate VLAN with strict access controls
🧯 If You Can't Patch
- Replace affected device with supported model
- Implement strict firewall rules blocking all external access to router management interface (TCP/80, TCP/443)
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If DIR-619L B1 with version 2.06, device is vulnerable.Check Version:
Log into router web interface and check System Status or Firmware Version pageVerify Fix Applied:
Verify firmware version is no longer 2.06. Test by attempting to access /goform/formSetPassword with monitoring for crash/abnormal behavior.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /goform/formSetPassword with abnormal curTime parameter length
- Router crash/reboot logs
- Unusual process creation in router logs
Network Indicators:
- HTTP POST requests to router IP on port 80/443 with formSetPassword in URL
- Abnormal traffic patterns from router after exploitation
SIEM Query:
source="router_logs" AND (url="/goform/formSetPassword" OR message="buffer overflow" OR message="segmentation fault")