CVE-2023-0757
📋 TL;DR
This critical vulnerability in PHOENIX CONTACT industrial automation software allows unauthenticated remote attackers to upload malicious code and gain full control of affected devices. It affects MULTIPROG and ProConOS eCLR (SDK) products used in industrial control systems. Attackers can completely compromise vulnerable devices without any authentication.
💻 Affected Systems
- PHOENIX CONTACT MULTIPROG
- PHOENIX CONTACT ProConOS eCLR (SDK)
📦 What is this software?
Multiprog by Phoenixcontact
Proconos Eclr by Phoenixcontact
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of industrial control systems leading to physical damage, production shutdown, safety system manipulation, or ransomware deployment across critical infrastructure.
Likely Case
Remote code execution leading to data theft, lateral movement within industrial networks, installation of persistent backdoors, or disruption of industrial processes.
If Mitigated
Limited impact if devices are isolated behind firewalls with strict network segmentation and access controls preventing external connections.
🎯 Exploit Status
Unauthenticated remote exploitation makes this highly attractive to attackers; industrial control system vulnerabilities are frequently targeted by advanced threat actors.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in available references
Vendor Advisory: https://cert.vde.com/en/advisories/VDE-2023-051/
Restart Required: Yes
Instructions:
1. Contact PHOENIX CONTACT for specific patch information. 2. Apply vendor-provided security updates. 3. Restart affected systems. 4. Test in non-production environment first.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected systems from untrusted networks using firewalls and network segmentation
Access Control Lists
allImplement strict network access controls to limit connections to trusted IP addresses only
🧯 If You Can't Patch
- Segment affected systems into isolated network zones with no internet access
- Implement application allowlisting to prevent execution of unauthorized code
🔍 How to Verify
Check if Vulnerable:
Check if running affected PHOENIX CONTACT MULTIPROG or ProConOS eCLR versions; review system logs for unauthorized upload attemptsCheck Version:
Check software version through PHOENIX CONTACT management interface or contact vendorVerify Fix Applied:
Verify patch installation through vendor documentation and test with authorized vulnerability scanning📡 Detection & Monitoring
Log Indicators:
- Unauthorized file upload attempts
- Unexpected process execution
- Network connections from unusual sources to industrial control ports
Network Indicators:
- Unusual traffic to industrial control system ports (typically 4840/tcp for OPC UA, 102/tcp for S7, or other industrial protocols)
- Unexpected outbound connections from industrial systems
SIEM Query:
source="industrial_control_logs" AND (event_type="file_upload" OR process_name="unexpected_executable")