CVE-2024-3016
📋 TL;DR
This vulnerability allows unauthenticated attackers on the local network to access undocumented system settings and modify configurations on NEC DT900/DT900S series devices. Affected systems include NEC Platforms DT900 and DT900S Series running vulnerable firmware versions.
💻 Affected Systems
- NEC Platforms DT900 Series
- NEC Platforms DT900S Series
⚠️ 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 attackers to reconfigure critical settings, disable security controls, or potentially gain persistent access to the device and connected systems.
Likely Case
Unauthorized configuration changes leading to service disruption, data exposure, or security policy bypass.
If Mitigated
Limited impact if network segmentation prevents local network access or if additional authentication layers are implemented.
🎯 Exploit Status
Exploitation requires only network access and knowledge of undocumented endpoints. No authentication or special tools needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions above 5.6.0.20
Vendor Advisory: https://jpn.nec.com/security-info/secinfo/nv24-002_en.html
Restart Required: Yes
Instructions:
1. Download latest firmware from NEC support portal. 2. Backup current configuration. 3. Apply firmware update via web interface or CLI. 4. Reboot device. 5. Verify version is above vulnerable range.
🔧 Temporary Workarounds
Network Segmentation
allIsolate DT900/DT900S devices on separate VLANs with strict access controls
Access Control Lists
allImplement network ACLs to restrict access to device management interfaces
🧯 If You Can't Patch
- Segment devices on isolated networks with strict firewall rules
- Implement network monitoring for unauthorized configuration change attempts
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface (System > Information) or CLI command 'show version'Check Version:
show versionVerify Fix Applied:
Confirm firmware version is above 5.6.0.20 and test that undocumented endpoints require authentication📡 Detection & Monitoring
Log Indicators:
- Unauthenticated access to system settings endpoints
- Configuration changes from unexpected IP addresses
Network Indicators:
- HTTP requests to undocumented system settings endpoints from unauthenticated sources
SIEM Query:
source="dt900_logs" AND (event="config_change" AND user="anonymous") OR (uri="/undocumented/settings/*" AND auth_status="failed")