CVE-2024-28354
📋 TL;DR
This is a critical command injection vulnerability in TRENDnet TEW-827DRU routers that allows remote attackers to execute arbitrary commands with root privileges. Attackers can exploit this by injecting malicious commands into specific POST request parameters to the apply.cgi interface. All users of affected firmware versions are at risk of complete device compromise.
💻 Affected Systems
- TRENDnet TEW-827DRU router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete router takeover with root shell access, allowing attackers to intercept all network traffic, install persistent malware, pivot to internal networks, and use the router as a botnet node.
Likely Case
Router compromise leading to credential theft, DNS hijacking, man-in-the-middle attacks, and network surveillance.
If Mitigated
Limited impact if router is behind firewall with strict inbound rules and network segmentation prevents lateral movement.
🎯 Exploit Status
Exploitation requires access to the web interface but authentication status is unclear from available information.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Check TRENDnet website for firmware updates
2. If update available, download and install via web interface
3. Verify firmware version after update
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router web interface
Network Segmentation
allIsolate router management interface from untrusted networks
🧯 If You Can't Patch
- Replace affected router with different model
- Implement strict firewall rules blocking all inbound access to router management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface at System Status > Firmware InformationCheck Version:
Not applicable - check via web interfaceVerify Fix Applied:
Verify firmware version is no longer 2.10B01📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to apply.cgi with shell metacharacters in parameters
- Multiple failed authentication attempts followed by successful apply.cgi requests
Network Indicators:
- Unusual outbound connections from router
- DNS queries to suspicious domains from router
SIEM Query:
source_ip=router_ip AND (uri_path="/apply.cgi" AND (param_name="usapps.@smb" OR param_value CONTAINS "$" OR param_value CONTAINS "|" OR param_value CONTAINS ";"))