CVE-2024-25748
📋 TL;DR
A stack-based buffer overflow vulnerability in Tenda AC9 routers allows remote attackers to execute arbitrary code via the fromSetIpMacBind function. This affects Tenda AC9 v3.0 routers running firmware version v.15.03.06.42_multi. Attackers can potentially gain full control of affected devices.
💻 Affected Systems
- Tenda AC9
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, network infiltration, data exfiltration, and persistent backdoor installation.
Likely Case
Router takeover enabling DNS hijacking, traffic interception, credential theft, and lateral movement within the network.
If Mitigated
Limited impact if device is behind firewall with restricted WAN access and proper network segmentation.
🎯 Exploit Status
Public proof-of-concept available on GitHub. Exploitation appears straightforward based on available technical details.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Tenda official website for firmware updates 2. Download latest firmware for AC9 v3.0 3. Access router web interface 4. Navigate to System Tools > Firmware Upgrade 5. Upload and install new firmware 6. Reboot router
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router web interface
Network Segmentation
allIsolate router management interface to trusted network segment
🧯 If You Can't Patch
- Replace affected router with different model/brand
- Place router behind dedicated firewall with strict inbound rules
🔍 How to Verify
Check if Vulnerable:
Check router web interface > System Status > Firmware Version. If version is v.15.03.06.42_multi on AC9 v3.0, device is vulnerable.Check Version:
curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
After firmware update, verify version has changed from v.15.03.06.42_multi to a newer version.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/setIpMacBind
- Multiple failed authentication attempts followed by successful fromSetIpMacBind access
- Router configuration changes from unknown IPs
Network Indicators:
- Unusual outbound connections from router to unknown IPs
- DNS queries to suspicious domains from router
- Traffic redirection patterns
SIEM Query:
source="router_logs" AND (uri="/goform/setIpMacBind" OR function="fromSetIpMacBind")