CVE-2024-34539
📋 TL;DR
Hardcoded credentials in TerraMaster TOS firmware allow remote attackers to authenticate to mail/webmail servers and administration panels. This vulnerability enables unauthorized privileged actions on affected systems. All TerraMaster NAS devices running vulnerable TOS firmware versions are impacted.
💻 Affected Systems
- TerraMaster TOS
⚠️ 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 system compromise allowing data theft, ransomware deployment, or device takeover as part of a botnet.
Likely Case
Unauthorized access to sensitive data, configuration changes, and potential lateral movement within the network.
If Mitigated
Limited impact if systems are isolated behind firewalls with strict network controls and credential rotation.
🎯 Exploit Status
Simple credential-based authentication bypass requiring only network access to vulnerable services.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: TOS 5.1.41 or later
Vendor Advisory: https://www.terra-master.com/global/
Restart Required: Yes
Instructions:
1. Backup critical data. 2. Download latest TOS firmware from TerraMaster website. 3. Log into TOS admin panel. 4. Navigate to Control Panel > General Settings > Update & Restore. 5. Upload firmware file and apply update. 6. System will reboot automatically.
🔧 Temporary Workarounds
Network Isolation
allBlock external access to TerraMaster administration interfaces
Service Disablement
allDisable mail and webmail services if not required
🧯 If You Can't Patch
- Immediately change all administrator passwords and implement multi-factor authentication
- Isolate TerraMaster devices in separate VLAN with strict firewall rules blocking unnecessary ports
🔍 How to Verify
Check if Vulnerable:
Check TOS version in Control Panel > General Settings > About. If version is 5.1 or earlier, system is vulnerable.Check Version:
ssh admin@terramaster-ip 'cat /etc/version' or check web interfaceVerify Fix Applied:
Verify TOS version is 5.1.41 or later and test authentication with previously known hardcoded credentials fails.📡 Detection & Monitoring
Log Indicators:
- Failed login attempts followed by successful logins from unexpected IPs
- Authentication events using default/hardcoded credentials
Network Indicators:
- Unusual authentication traffic to TerraMaster administration ports (typically 8181, 8182)
- External IP addresses accessing internal TerraMaster services
SIEM Query:
source="terramaster-logs" AND (event_type="authentication" AND (username="admin" OR username="root")) OR (destination_port=8181 OR destination_port=8182) AND source_ip NOT IN internal_subnets