CVE-2023-30400
📋 TL;DR
This CVE describes a command injection vulnerability in Anyka Microelectronics AK3918EV300 MCU firmware version 18. Attackers can execute arbitrary commands by injecting malicious payloads into WiFi SSID or password fields during network configuration. This affects devices using this specific MCU firmware version.
💻 Affected Systems
- Anyka Microelectronics AK3918EV300 MCU
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to install persistent backdoors, exfiltrate data, pivot to other network devices, or render the device inoperable.
Likely Case
Remote code execution leading to device takeover, credential theft, and lateral movement within the network.
If Mitigated
Limited impact if network segmentation, input validation, and proper access controls are implemented.
🎯 Exploit Status
Proof of concept available in GitHub repository. Exploitation requires network access to the device's configuration interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Check with Anyka Microelectronics for firmware updates.
🔧 Temporary Workarounds
Input Validation for WiFi Configuration
allImplement strict input validation and sanitization for WiFi SSID and password fields
Not applicable - requires code changes
Network Segmentation
linuxIsolate affected devices in separate network segments with strict firewall rules
iptables -A INPUT -s <trusted_network> -p tcp --dport <config_port> -j ACCEPT
iptables -A INPUT -p tcp --dport <config_port> -j DROP
🧯 If You Can't Patch
- Disable remote configuration interfaces if not required
- Implement network access controls to restrict access to configuration interfaces
🔍 How to Verify
Check if Vulnerable:
Check firmware version on device: cat /proc/version or check device documentationCheck Version:
cat /proc/version | grep -i 'AK3918EV300'Verify Fix Applied:
Test WiFi configuration with malicious payloads containing command injection attempts📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- WiFi configuration attempts with special characters
- Process execution from network configuration scripts
Network Indicators:
- Unusual outbound connections from embedded devices
- Traffic to unexpected ports from MCU devices
SIEM Query:
source="device_logs" AND ("wifi config" OR "ssid" OR "password") AND ("|" OR ";" OR "$" OR "`" OR "&&")