CVE-2019-12182
📋 TL;DR
This vulnerability allows unauthenticated remote attackers to execute arbitrary code on Safescan Timemoto and TA-8000 biometric time clock devices via directory traversal in the administrative API. It affects organizations using these devices for employee time tracking, potentially compromising sensitive biometric data and system integrity.
💻 Affected Systems
- Safescan Timemoto
- Safescan TA-8000 series
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover leading to credential theft, biometric data exfiltration, lateral movement to internal networks, and persistent backdoor installation.
Likely Case
Unauthorized administrative access allowing time clock manipulation, data tampering, and potential ransomware deployment affecting payroll systems.
If Mitigated
Limited impact if devices are isolated in separate VLANs with strict network segmentation and access controls.
🎯 Exploit Status
Proof-of-concept exploit code is publicly available on GitHub, making exploitation trivial for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware 7.03.100
Vendor Advisory: https://support.timemoto.com/en/s/safescan-time-clock-systems/a/firmware-update-7-dot-03-dot-100-ta8000-14
Restart Required: Yes
Instructions:
1. Download firmware 7.03.100 from vendor support site. 2. Connect to device via USB or network. 3. Upload firmware file through web interface. 4. Confirm successful update and restart device.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Safescan devices in separate VLAN with strict firewall rules blocking all inbound traffic except from management systems.
API Access Restriction
allConfigure firewall to block access to administrative API endpoints (typically port 80/443) from untrusted networks.
🧯 If You Can't Patch
- Deploy network-based intrusion prevention system (IPS) rules to detect and block directory traversal attempts.
- Implement strict outbound filtering to prevent data exfiltration if device is compromised.
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface at http://device-ip/status or via serial console. If version is 1.0, device is vulnerable.Check Version:
curl -s http://device-ip/status | grep -i versionVerify Fix Applied:
Verify firmware version shows 7.03.100 or higher in device status page. Test API endpoints for directory traversal using safe test payloads.📡 Detection & Monitoring
Log Indicators:
- Unusual API requests with '../' sequences
- Multiple failed authentication attempts followed by successful API calls
- Unexpected process execution logs
Network Indicators:
- HTTP requests containing '../' patterns to administrative endpoints
- Unusual outbound connections from device to external IPs
- Port scanning originating from device
SIEM Query:
source="safescan" AND (uri="*../*" OR method="POST" AND uri="*/api/*")🔗 References
- https://github.com/ProCheckUp/SafeScan
- https://procheckup.com/blogs/posts/2020/february/remote-code-execution-on-biometric-iot-devices/
- https://safescan.com/
- https://support.timemoto.com/en/s/safescan-time-clock-systems/a/firmware-update-7-dot-03-dot-100-ta8000-14
- https://github.com/ProCheckUp/SafeScan
- https://procheckup.com/blogs/posts/2020/february/remote-code-execution-on-biometric-iot-devices/
- https://safescan.com/
- https://support.timemoto.com/en/s/safescan-time-clock-systems/a/firmware-update-7-dot-03-dot-100-ta8000-14
