CVE-2024-24954
📋 TL;DR
This vulnerability allows remote attackers to write arbitrary null bytes to heap memory in AutomationDirect P3-550E PLC programming software. Exploitation can lead to memory corruption, potentially enabling remote code execution or denial of service. Organizations using P3-550E firmware version 1.2.10.9 are affected.
💻 Affected Systems
- AutomationDirect P3-550E
📦 What is this software?
P3 550e Firmware by Automationdirect
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, manipulation of industrial processes, or persistent backdoor installation
Likely Case
Denial of service causing PLC malfunction or system crashes disrupting industrial operations
If Mitigated
Limited impact with proper network segmentation and monitoring, potentially only causing temporary service interruption
🎯 Exploit Status
Requires crafting specific network packets but no authentication needed. Vulnerability details are publicly disclosed in Talos reports.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check AutomationDirect website for security advisories
2. Monitor for firmware updates
3. Apply any available patches following vendor instructions
4. Restart affected devices after patching
🔧 Temporary Workarounds
Network Segmentation
allIsolate P3-550E devices from untrusted networks and restrict access to necessary systems only
Firewall Rules
allBlock access to Programming Software Connection FileSystem API ports from unauthorized sources
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure
- Monitor network traffic for suspicious patterns targeting the FileSystem API
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via programming software interface or device web interfaceCheck Version:
Use AutomationDirect programming software to read device firmware versionVerify Fix Applied:
Verify firmware version has been updated beyond 1.2.10.9📡 Detection & Monitoring
Log Indicators:
- Unexpected device restarts
- Memory access errors in system logs
- Unusual network connections to FileSystem API
Network Indicators:
- Malformed packets to Programming Software Connection FileSystem API
- Traffic patterns matching exploit signatures
SIEM Query:
source_ip:external AND dest_port:PORT_NUMBER AND protocol:TCP AND payload_size:ANOMALOUS