CVE-2024-39888
📋 TL;DR
Mendix Encryption module versions 10.0.0 through 10.0.1 use a hard-coded default encryption key when no custom key is specified. This allows attackers to decrypt any encrypted project data using the known default key. All Mendix projects using affected versions without custom encryption keys are vulnerable.
💻 Affected Systems
- Mendix Encryption Module
⚠️ 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 all encrypted data in affected Mendix applications, including sensitive business data, credentials, and proprietary information.
Likely Case
Exposure of sensitive application data stored in encrypted form, potentially leading to data breaches and compliance violations.
If Mitigated
Limited impact if custom encryption keys were configured or if affected systems are isolated from external access.
🎯 Exploit Status
Exploitation requires only knowledge of the hard-coded default key and access to encrypted data. No authentication or special access needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V10.0.2
Vendor Advisory: https://cert-portal.siemens.com/productcert/html/ssa-998949.html
Restart Required: Yes
Instructions:
1. Update Mendix Encryption module to version 10.0.2 or later. 2. Redeploy affected Mendix applications. 3. Regenerate encryption keys for existing encrypted data.
🔧 Temporary Workarounds
Configure Custom Encryption Key
allDefine a custom EncryptionKey constant in your Mendix project to override the default vulnerable key.
Define EncryptionKey constant in project settings with a secure random value
🧯 If You Can't Patch
- Immediately configure custom encryption keys for all affected projects
- Isolate affected systems from untrusted networks and implement strict access controls
🔍 How to Verify
Check if Vulnerable:
Check Mendix project configuration for EncryptionKey constant. If not defined or using default value, the system is vulnerable.Check Version:
Check Mendix Modeler or Runtime for module version informationVerify Fix Applied:
Verify Mendix Encryption module version is 10.0.2 or later and custom EncryptionKey is configured.📡 Detection & Monitoring
Log Indicators:
- Unusual decryption attempts
- Access patterns to encrypted data stores
Network Indicators:
- Traffic to encrypted data endpoints without proper authentication
SIEM Query:
Search for decryption operations or data access patterns matching known default key usage