CVE-2022-47383
📋 TL;DR
An authenticated remote attacker can exploit a stack-based out-of-bounds write vulnerability in the CmpTraceMgr component of CODESYS products to cause denial-of-service, memory corruption, or potentially execute arbitrary code. This affects multiple CODESYS products across various versions. Organizations using CODESYS industrial automation software are at risk.
💻 Affected Systems
- CODESYS Control runtime systems
- CODESYS Development System
- CODESYS Gateway
- CODESYS HMI
- CODESYS Safety
- CODESYS SoftMotion
- CODESYS OPC UA Server
📦 What is this software?
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⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, allowing attacker to take control of industrial control systems.
Likely Case
Denial-of-service conditions disrupting industrial operations, with potential for memory corruption affecting system stability.
If Mitigated
Limited impact if proper network segmentation and authentication controls prevent attacker access to vulnerable systems.
🎯 Exploit Status
Requires authenticated access and knowledge of CODESYS systems. Stack-based buffer overflow exploitation requires specific conditions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Varies by product - refer to CODESYS Security Advisory 2022-12
Vendor Advisory: https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=17554&token=5444f53b4c90fe37043671a100dffa75305d1825&download=
Restart Required: Yes
Instructions:
1. Download appropriate patch from CODESYS customer portal. 2. Apply patch according to CODESYS documentation. 3. Restart affected systems. 4. Verify patch installation.
🔧 Temporary Workarounds
Disable CmpTraceMgr component
allDisable the vulnerable CmpTraceMgr component if not required for operations
Refer to CODESYS documentation for component disabling procedures
Network segmentation
allIsolate CODESYS systems from untrusted networks and implement strict access controls
🧯 If You Can't Patch
- Implement strict network segmentation to isolate CODESYS systems from untrusted networks
- Enforce strong authentication mechanisms and monitor for unauthorized access attempts
- Disable unnecessary CODESYS services and components, particularly CmpTraceMgr if not required
🔍 How to Verify
Check if Vulnerable:
Check CODESYS version against affected versions in vendor advisory. Verify if CmpTraceMgr component is enabled.Check Version:
Use CODESYS development environment or runtime tools to check version informationVerify Fix Applied:
Verify installed version matches or exceeds patched version specified in CODESYS advisory. Confirm CmpTraceMgr component is either patched or disabled.📡 Detection & Monitoring
Log Indicators:
- Unusual authentication attempts to CODESYS systems
- CmpTraceMgr component errors or crashes
- Memory access violations in system logs
Network Indicators:
- Unexpected connections to CODESYS ports (typically 1217, 2455, 11740)
- Traffic patterns indicating exploitation attempts
SIEM Query:
source="codesys" AND (event_type="authentication_failure" OR event_type="component_crash" OR message="*CmpTraceMgr*")