CVE-2024-23309
📋 TL;DR
The LevelOne WBR-6012 router has an authentication bypass vulnerability where attackers can spoof IP addresses to gain unauthorized access to the web interface without valid credentials. This affects all users of this specific router model with vulnerable firmware. Attackers could potentially take full control of the router.
💻 Affected Systems
- LevelOne WBR-6012 router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete router compromise allowing attackers to reconfigure network settings, intercept traffic, install malware, or use the router as a pivot point into the internal network.
Likely Case
Unauthorized access to router administration panel leading to network configuration changes, DNS hijacking, or credential theft.
If Mitigated
Limited impact if router is behind additional firewall protections or not internet-facing, though internal attackers could still exploit.
🎯 Exploit Status
Exploitation requires IP spoofing which is straightforward with tools like Scapy. No authentication needed to trigger the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Check vendor website for firmware updates. Consider replacing router if no fix is provided.
🔧 Temporary Workarounds
Disable web interface from WAN
allPrevent external access to router administration interface
Access router settings → Security → Remote Management → Disable
Implement network segmentation
allIsolate router management interface to separate VLAN
🧯 If You Can't Patch
- Replace router with supported model from different vendor
- Place router behind firewall with strict IP whitelisting for management access
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface. If version is R0.40e6, device is vulnerable.Check Version:
Login to router web interface and check System Status or About page for firmware version.Verify Fix Applied:
Test authentication bypass by attempting to access admin interface with spoofed IP address using tools like Scapy.📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts followed by successful access from same IP
- Admin access from unexpected IP addresses
- Configuration changes from unauthenticated sources
Network Indicators:
- HTTP requests to router admin pages without session cookies
- IP spoofing attempts targeting router IP
SIEM Query:
source_ip=router_ip AND (http_method=POST OR http_uri CONTAINS "/admin") AND NOT user_agent CONTAINS "browser"