CVE-2025-6371
📋 TL;DR
A critical stack-based buffer overflow vulnerability in D-Link DIR-619L routers allows remote attackers to execute arbitrary code by manipulating the curTime parameter in the formSetEnableWizard function. This affects all users of DIR-619L firmware version 2.06B01, particularly concerning since these products are no longer supported by the vendor.
💻 Affected Systems
- D-Link DIR-619L
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, network infiltration, and persistent backdoor installation.
Likely Case
Device takeover enabling traffic interception, credential theft, and use as attack platform.
If Mitigated
Limited impact if device is isolated behind firewalls with strict network segmentation.
🎯 Exploit Status
Public exploit code available, remote exploitation without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: None
Vendor Advisory: https://www.dlink.com/
Restart Required: No
Instructions:
No official patch available. Product is end-of-life. Replace with supported hardware.
🔧 Temporary Workarounds
Network Isolation
allPlace affected routers behind firewalls with strict inbound rules.
Disable Remote Management
allTurn off WAN-side administration access.
🧯 If You Can't Patch
- Immediately replace affected routers with supported models
- Implement strict network segmentation and firewall rules to isolate vulnerable devices
🔍 How to Verify
Check if Vulnerable:
Check router web interface or CLI for firmware version 2.06B01 on DIR-619L hardware.Check Version:
Check router web interface at http://[router-ip]/ or use telnet/ssh if enabled.Verify Fix Applied:
Cannot verify fix as no patch exists. Verify replacement with supported hardware.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/formSetEnableWizard with long curTime parameters
- Multiple failed buffer overflow attempts
Network Indicators:
- Traffic to router management interface from unexpected sources
- POST requests with unusually long parameter values
SIEM Query:
source_ip:* AND destination_port:(80 OR 443) AND url_path:"/goform/formSetEnableWizard" AND http_method:POST