CVE-2024-41969
📋 TL;DR
CVE-2024-41969 is a missing authentication vulnerability in CODESYS V3 service that allows low-privileged remote attackers to modify system configuration. This could lead to full system compromise or denial of service. Organizations using CODESYS V3 for industrial automation and control systems are affected.
💻 Affected Systems
- CODESYS V3 Runtime System
⚠️ 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
Full system takeover allowing attacker to execute arbitrary code, disrupt industrial processes, or cause physical damage to equipment.
Likely Case
Configuration manipulation leading to service disruption, unauthorized control of industrial processes, or lateral movement within OT networks.
If Mitigated
Limited impact if proper network segmentation and access controls prevent remote exploitation attempts.
🎯 Exploit Status
Remote exploitation without authentication makes this easily exploitable once details become public.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check CODESYS Security Advisory for specific patched versions
Vendor Advisory: https://cert.vde.com/en/advisories/VDE-2024-047
Restart Required: Yes
Instructions:
1. Review CODESYS Security Advisory 2. Download and apply appropriate patch from CODESYS 3. Restart affected services 4. Verify patch installation
🔧 Temporary Workarounds
Network Segmentation
allIsolate CODESYS systems from untrusted networks and implement strict firewall rules
Access Control Hardening
allImplement strict authentication and authorization controls for CODESYS services
🧯 If You Can't Patch
- Implement network segmentation to isolate CODESYS systems from untrusted networks
- Deploy intrusion detection systems monitoring for configuration modification attempts
🔍 How to Verify
Check if Vulnerable:
Check CODESYS version against affected versions in vendor advisoryCheck Version:
Check CODESYS Control application or runtime system version informationVerify Fix Applied:
Verify installed version matches or exceeds patched version specified in advisory📡 Detection & Monitoring
Log Indicators:
- Unauthorized configuration changes
- Authentication bypass attempts
- Unexpected service restarts
Network Indicators:
- Unusual configuration modification traffic to CODESYS ports
- Traffic from unauthorized sources to CODESYS services
SIEM Query:
source="codesys" AND (event_type="config_change" OR auth_result="failure")