CVE-2024-9914
📋 TL;DR
A critical buffer overflow vulnerability in D-Link DIR-619L B1 routers allows remote attackers to execute arbitrary code by manipulating the curTime parameter in the formSetWizardSelectMode function. This affects users running firmware version 2.06 on these specific router models. 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, credential theft, network pivoting, and persistent backdoor installation.
Likely Case
Router crash/reboot causing service disruption, or limited code execution for reconnaissance and lateral movement.
If Mitigated
Denial of service if exploit fails or is blocked by network controls, with no persistent impact.
🎯 Exploit Status
Public exploit details available on GitHub. Attack requires sending crafted HTTP request to 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. If update available, download and upload via router web interface. 3. Reboot router after update.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router web interface
Access router admin panel > Advanced > Remote Management > Disable
Network Segmentation
allIsolate router management interface to trusted network
Configure firewall rules to restrict access to router IP on port 80/443
🧯 If You Can't Patch
- Replace vulnerable router with supported model
- Implement strict network ACLs to block all access to router management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface: Login > Tools > System > Firmware InformationCheck Version:
curl -s http://router-ip/Model.json | grep FirmwareVerify Fix Applied:
Verify firmware version is no longer 2.06 after update📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /goform/formSetWizardSelectMode with abnormal curTime parameter
- Router crash/reboot logs
Network Indicators:
- Unusual HTTP POST requests to router management port
- Traffic patterns suggesting exploit attempts
SIEM Query:
source="router_logs" AND uri="/goform/formSetWizardSelectMode" AND (param="curTime" OR data CONTAINS "curTime")