CVE-2022-26943
📋 TL;DR
Motorola MTM5000 series TETRA radios use weak random number generation for authentication challenges, allowing attackers to predict or brute-force authentication tokens. This affects all Motorola MTM5000 series radios running vulnerable firmware versions. Successful exploitation could allow unauthorized access to TETRA networks.
💻 Affected Systems
- Motorola MTM5000 series TETRA radios
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of TETRA network security allowing unauthorized access, interception of communications, and potential impersonation of legitimate devices.
Likely Case
Unauthorized access to TETRA networks, interception of sensitive communications, and potential denial of service attacks.
If Mitigated
Limited impact if network segmentation and additional authentication controls are implemented alongside patching.
🎯 Exploit Status
Exploitation requires radio proximity and specialized TETRA equipment, but the cryptographic weakness is fundamental.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Contact Motorola Solutions for specific patched firmware versions
Vendor Advisory: https://tetraburst.com/
Restart Required: Yes
Instructions:
1. Contact Motorola Solutions for patched firmware. 2. Backup device configuration. 3. Apply firmware update via official programming tools. 4. Verify authentication challenge generation uses proper entropy sources.
🔧 Temporary Workarounds
Network Segmentation
allIsolate TETRA networks from other critical infrastructure
Additional Authentication Controls
allImplement multi-factor authentication or additional network-level authentication
🧯 If You Can't Patch
- Physically secure devices to prevent unauthorized radio access
- Implement network monitoring for unusual authentication patterns
🔍 How to Verify
Check if Vulnerable:
Check firmware version against Motorola's advisory; test authentication challenge randomness using specialized TETRA testing equipment.Check Version:
Use Motorola programming software to read device firmware versionVerify Fix Applied:
Verify firmware version is updated and test that authentication challenges show proper cryptographic randomness.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts
- Authentication from unexpected locations/times
Network Indicators:
- Unusual TETRA authentication patterns
- Suspicious radio signal activity
SIEM Query:
Search for authentication failures or unusual TETRA device behavior patterns