Hitachi Energy TropOS Devices Series 1400/2400/6400
Act Now5.3ICS-CERT ICSA-24-352-02Dec 17, 2024
Attack VectorNetwork
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary
A denial-of-service vulnerability exists in Hitachi Energy TropOS devices (series 1400/2400/6400) running firmware versions below 8.9.6. An attacker can send a malformed network packet that causes the device to stop processing traffic. The vulnerability is due to insufficient input validation (CWE-20). Hitachi Energy is developing a firmware patch but has not yet released it. The vulnerability has a high exploit probability (EPSS 92.1%) but is not currently known to be actively exploited.
What this means
What could happen
An attacker could send malformed network packets to a TropOS device, causing it to stop routing traffic. This would disrupt communication between control systems and field devices, affecting grid stability or water system operations.
Who's at risk
Electric utilities and water authorities using Hitachi Energy TropOS core routers or edge nodes (series 1400, 2400, or 6400) for grid communication and SCADA network connectivity. Any organization relying on these devices to route traffic between control systems and field equipment.
How it could be exploited
An attacker on the network sends a specially crafted packet to the TropOS device on a network port exposed to the Internet or an untrusted network. The device fails to validate the packet correctly and crashes or stops processing traffic, triggering a denial of service. No authentication is required.
Prerequisites
- Network access to the TropOS device from the Internet or an untrusted network segment
- The TropOS device is running firmware version 8.9.6 or earlier
Remotely exploitableNo authentication requiredLow complexityHigh EPSS score (92.1%)No patch available yetDenial of service to critical network infrastructure
Exploitability
High exploit probability (EPSS 92.1%)
Affected products (1)
ProductAffected VersionsFix Status
TropOS devices series 1400/2400/6400: <8.9.6<8.9.68.9.6
Remediation & Mitigation
0/5
Do now
0/2WORKAROUNDRestrict network access to TropOS devices using firewall rules to block unwanted traffic; apply DoS filtering if available on your perimeter firewall
HARDENINGEnsure TropOS devices are not directly accessible from the Internet; place them behind a firewall with minimal exposed ports
Schedule — requires maintenance window
0/1Patching may require device reboot — plan for process interruption
HOTFIXUpdate TropOS firmware to version 8.9.6 or later once Hitachi Energy releases the patch
Long-term hardening
0/2HARDENINGIsolate the control system network from business networks using a firewall; do not allow direct connections to the Internet
HARDENINGIf remote access is needed, use a VPN instead of exposing devices directly to the Internet
CVEs (1)
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