CVE-2024-42757
📋 TL;DR
A command injection vulnerability in Asus RT-N15U routers allows remote attackers to execute arbitrary system commands through the netstat function page. This affects users running firmware version 3.0.0.4.376_3754 on Asus RT-N15U routers, potentially giving attackers full control of the device.
💻 Affected Systems
- Asus RT-N15U
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router allowing attackers to intercept all network traffic, install persistent malware, pivot to internal network devices, and use the router as a botnet node.
Likely Case
Router takeover leading to DNS hijacking, credential theft from network traffic, and installation of cryptocurrency miners or other malware.
If Mitigated
Limited impact if router is behind firewall with restricted WAN access and proper network segmentation is in place.
🎯 Exploit Status
Public proof-of-concept exists in GitHub repository. Exploitation requires network access to router's web interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
1. Check Asus support site for firmware updates
2. If update available, download and install 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 Settings > Administration > System > Disable 'Enable Web Access from WAN'
Network Segmentation
allIsolate router management interface
Configure firewall rules to restrict access to router IP on ports 80/443 to trusted IPs only
🧯 If You Can't Patch
- Replace router with supported model
- Place router behind dedicated firewall with strict inbound rules
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface: Login > Advanced Settings > Administration > Firmware UpgradeCheck Version:
curl -s http://router-ip/ | grep -i firmwareVerify Fix Applied:
Verify firmware version is different from 3.0.0.4.376_3754📡 Detection & Monitoring
Log Indicators:
- Unusual netstat page access
- Suspicious commands in system logs
- Multiple failed login attempts followed by successful access
Network Indicators:
- Unexpected outbound connections from router
- DNS queries to malicious domains
- Port scans originating from router
SIEM Query:
source="router.log" AND ("netstat" OR "cmd=" OR "exec=")