LOYTEC LVIS-3ME
Plan Patch8.1ICS-CERT ICSA-17-257-01Sep 14, 2017
Attack VectorNetwork
Auth RequiredNone
ComplexityHigh
User InteractionNone needed
Summary
LOYTEC LVIS-3ME building automation controllers contain multiple vulnerabilities in input validation (CWE-23), cryptographic token generation (CWE-331), and web interface handling (CWE-79, CWE-522). These allow remote code execution without authentication. Versions prior to 6.2.0 are affected. No patch is available from the vendor.
What this means
What could happen
An attacker with network access to the LVIS-3ME could execute code remotely, allowing them to modify building automation setpoints, disable HVAC controls, or disrupt facility operations without authentication.
Who's at risk
Building automation operators and facility managers using LVIS-3ME devices in commercial HVAC systems, data centers, and industrial facilities should prioritize mitigation since the device controls critical climate control and operations cannot be easily relocated or replaced.
How it could be exploited
An attacker sends a crafted network request to port 80 or 443 on the LVIS-3ME. Due to improper input validation (CWE-23) and use of insufficiently random tokens (CWE-331), the device accepts the request and executes code in the attacker's context, bypassing authentication.
Prerequisites
- Network reachability to the LVIS-3ME device (HTTP/HTTPS ports)
- No credentials required
- Device connected to an accessible network segment
remotely exploitableno authentication requiredlow complexityno patch availableaffects facility control systems
Exploitability
Moderate exploit probability (EPSS 8.3%)
Affected products (1)
ProductAffected VersionsFix Status
LVIS-3ME:< 6.2.06.2.0
Remediation & Mitigation
0/3
Do now
0/2HARDENINGIsolate LVIS-3ME devices on a dedicated building automation network segment with firewall rules restricting inbound access to trusted engineering workstations only
WORKAROUNDDisable remote web access to LVIS-3ME if not required for normal operations; use local serial or Ethernet access from an isolated engineering network only
Schedule — requires maintenance window
0/1Patching may require device reboot — plan for process interruption
HARDENINGMonitor network traffic to LVIS-3ME for unexpected connections and log all remote access attempts
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API:
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