CVE-2024-3912
📋 TL;DR
CVE-2024-3912 is an arbitrary firmware upload vulnerability affecting certain ASUS router models. Unauthenticated remote attackers can exploit this to upload malicious firmware and execute arbitrary system commands on vulnerable devices. This affects users of specific ASUS router models with vulnerable firmware versions.
💻 Affected Systems
- ASUS routers (specific models not detailed in provided references)
⚠️ 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 device compromise allowing attacker to install persistent backdoors, intercept all network traffic, pivot to internal networks, and use device as part of botnets.
Likely Case
Router takeover leading to network traffic interception, DNS hijacking, credential theft, and lateral movement to connected devices.
If Mitigated
Limited impact if devices are behind firewalls with strict ingress filtering and network segmentation.
🎯 Exploit Status
CVSS 9.8 indicates critical severity with low attack complexity. Unauthenticated remote exploitation makes this highly dangerous.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check ASUS security advisories for specific patched firmware versions
Vendor Advisory: https://www.asus.com/support/security-advisory/
Restart Required: Yes
Instructions:
1. Check ASUS security advisory for affected models. 2. Download latest firmware from ASUS support site. 3. Log into router admin interface. 4. Navigate to firmware update section. 5. Upload and install patched firmware. 6. Reboot router after installation.
🔧 Temporary Workarounds
Disable remote administration
allPrevents unauthenticated access to router management interface from WAN
Network segmentation
allPlace routers in DMZ or behind additional firewall with strict ingress filtering
🧯 If You Can't Patch
- Isolate vulnerable routers from internet using firewall rules to block all WAN access to management interfaces
- Implement network monitoring for unusual firmware upload attempts and unexpected configuration changes
🔍 How to Verify
Check if Vulnerable:
Check router firmware version against ASUS security advisory. Look for firmware upload functionality accessible without authentication.Check Version:
Log into router web interface and check System Status or Firmware Version pageVerify Fix Applied:
Verify firmware version matches patched version from ASUS advisory. Test that firmware upload requires proper authentication.📡 Detection & Monitoring
Log Indicators:
- Unauthenticated firmware upload attempts
- Unexpected firmware version changes
- Unusual system command execution
Network Indicators:
- HTTP POST requests to firmware upload endpoints from unexpected sources
- Unusual outbound traffic from router
SIEM Query:
source="router_logs" AND (event="firmware_upload" OR event="unauthorized_access")