CVE-2024-9782
📋 TL;DR
This critical buffer overflow vulnerability in D-Link DIR-619L B1 routers allows remote attackers to execute arbitrary code by manipulating the curTime parameter. Attackers can exploit this without authentication to potentially take full control of affected devices. All users of vulnerable DIR-619L B1 routers are 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, network traffic interception, and lateral movement to other devices on the network.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept traffic, or use the device as part of a botnet.
If Mitigated
Limited impact if device is behind strict firewall rules or network segmentation prevents external access.
🎯 Exploit Status
Public exploit details are available on GitHub. The vulnerability requires sending a specially crafted HTTP request to the vulnerable endpoint.
🛠️ 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. Download latest firmware for DIR-619L B1. 3. Access router admin interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router web interface
Network Segmentation
allIsolate router management interface to trusted network
🧯 If You Can't Patch
- Replace affected router with supported model
- Implement strict firewall rules blocking access to port 80/443 on WAN interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via admin interface at 192.168.0.1 or router IP. Navigate to Tools > System Info.Check Version:
curl -s http://router-ip/ | grep -i firmware or check admin interfaceVerify Fix Applied:
Verify firmware version is updated beyond 2.06. Test if /goform/formEasySetupWWConfig endpoint still accepts malformed curTime parameter.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /goform/formEasySetupWWConfig with unusually long curTime parameter
- Multiple failed buffer overflow attempts in router logs
Network Indicators:
- Unusual HTTP POST requests to router management interface from external IPs
- Traffic patterns suggesting exploit payload delivery
SIEM Query:
source="router_logs" AND (url="/goform/formEasySetupWWConfig" AND (param_length>100 OR contains(param,"curTime")))