CVE-2023-45591
📋 TL;DR
A heap-based buffer overflow in the logger_generic function of the Ax_rtu binary allows remote authenticated attackers to cause memory corruption, potentially leading to denial-of-service, arbitrary code execution with root privileges, or other impacts. This affects AiLux imx6 bundle versions below imx6_1.0.7-2.
💻 Affected Systems
- AiLux imx6 bundle
📦 What is this software?
Imx6 by Ailux
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with root privileges, leading to full system compromise.
Likely Case
Denial-of-service condition disrupting device functionality.
If Mitigated
Limited impact if patched or isolated, with no exploitation.
🎯 Exploit Status
Exploitation requires authentication, but heap overflows can be leveraged for code execution with moderate complexity.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: imx6_1.0.7-2 or later
Vendor Advisory: https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2023-45591
Restart Required: Yes
Instructions:
1. Check current version with provided command. 2. Update to imx6_1.0.7-2 or later via vendor channels. 3. Restart the device to apply changes.
🔧 Temporary Workarounds
Restrict network access
linuxLimit access to the Ax_rtu service to trusted IPs only.
iptables -A INPUT -p tcp --dport <port> -s <trusted_ip> -j ACCEPT
iptables -A INPUT -p tcp --dport <port> -j DROP
Disable or block service
linuxTemporarily disable the Ax_rtu binary if not essential.
systemctl stop ax_rtu
chmod -x /path/to/Ax_rtu
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected devices.
- Monitor logs for unusual activity and enforce least privilege access controls.
🔍 How to Verify
Check if Vulnerable:
Check the installed version of AiLux imx6 bundle; if below imx6_1.0.7-2, it is vulnerable.Check Version:
cat /etc/ailux-version or check vendor documentation for version command.Verify Fix Applied:
Confirm version is imx6_1.0.7-2 or higher after update.📡 Detection & Monitoring
Log Indicators:
- Unusual crashes or restarts of Ax_rtu process
- Authentication logs showing unexpected access attempts
Network Indicators:
- Suspicious traffic to the Ax_rtu service port
- Anomalous network patterns from authenticated sources
SIEM Query:
source="syslog" AND process="Ax_rtu" AND (event="segmentation fault" OR event="buffer overflow")