CVE-2024-24326
📋 TL;DR
This CVE describes a command injection vulnerability in TOTOLINK A3300R routers that allows attackers to execute arbitrary commands on the device. The vulnerability exists in the setStaticDhcpRules function via the arpEnable parameter. This affects users of TOTOLINK A3300R routers with the vulnerable firmware version.
💻 Affected Systems
- TOTOLINK A3300R
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to persistent backdoor installation, network traffic interception, lateral movement to other devices, and participation in botnets.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept network traffic, or use the device as a pivot point for further attacks.
If Mitigated
Limited impact if device is behind firewall with restricted WAN access and proper network segmentation is implemented.
🎯 Exploit Status
Exploitation requires authentication to the web interface. The GitHub reference contains technical details about the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
Check TOTOLINK official website for firmware updates. If available, download the latest firmware and upload via the web management interface under System Tools > Firmware Upgrade.
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to the web management interface
Access router web interface > Advanced > System Tools > Administration > Disable 'Remote Management'
Change default credentials
allUse strong, unique passwords for router administration
Access router web interface > Advanced > System Tools > Administration > Change admin password
🧯 If You Can't Patch
- Segment the router on a dedicated VLAN with strict firewall rules limiting inbound/outbound traffic
- Implement network monitoring to detect unusual command execution patterns or unexpected outbound connections
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router web interface: Advanced > Status > Device Info > Firmware VersionCheck Version:
Not applicable - check via web interfaceVerify Fix Applied:
Verify firmware version is newer than V17.0.0cu.557_B20221024📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Multiple failed login attempts followed by successful login
- Unexpected configuration changes
Network Indicators:
- Unusual outbound connections from router IP
- Traffic to known malicious IPs from router
- Unexpected DNS queries
SIEM Query:
source="router_logs" AND (command="*;*" OR command="*|*" OR command="*`*" OR command="*$(*")