CVE-2023-45464
📋 TL;DR
This vulnerability in Netis N3Mv2 routers allows attackers to cause a Denial of Service (DoS) by sending specially crafted input to the servDomain parameter, which triggers a buffer overflow. It affects Netis N3Mv2-V1.0.1.865 routers, potentially disrupting network services for users of these devices.
💻 Affected Systems
- Netis N3Mv2 router
📦 What is this software?
N3m Firmware by Netis Systems
⚠️ Risk & Real-World Impact
Worst Case
Complete device crash requiring physical reboot, extended service disruption, and potential for remote code execution if the overflow can be controlled precisely.
Likely Case
Router becomes unresponsive, requiring reboot to restore functionality, causing temporary network outage.
If Mitigated
Minimal impact with proper network segmentation and access controls preventing exploitation attempts.
🎯 Exploit Status
Public proof-of-concept available on GitHub; exploitation requires sending crafted HTTP request to vulnerable parameter.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
Check Netis vendor website for firmware updates. If available, download and install latest firmware via router admin interface.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected routers from untrusted networks to limit attack surface.
Access Control Lists
linuxImplement firewall rules to restrict access to router management interface.
iptables -A INPUT -p tcp --dport 80 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
🧯 If You Can't Patch
- Replace affected devices with supported models
- Implement network monitoring for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface; if version is V1.0.1.865, device is vulnerable.Check Version:
Login to router admin interface and navigate to System Status or Firmware Information page.Verify Fix Applied:
Verify firmware version has been updated to a version later than V1.0.1.865.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to router management interface
- Router reboot events without cause
Network Indicators:
- HTTP requests with unusually long servDomain parameter values
SIEM Query:
source="router_logs" AND (uri="*servDomain=*" AND length(uri)>100)