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Cooper Power Systems Cybectec DNP3 Master OPC Server Improper Input Validation

Low RiskICS-CERT ICSA-13-346-02Sep 14, 2013
Summary

Cooper Power Systems Cybectec DNP3 Master OPC Server contains improper input validation. The vulnerability affects all versions of the product. No patch is available.

What this means
What could happen
An attacker could send malformed input to the DNP3 Master OPC Server, potentially causing the server to malfunction, crash, or exhibit unexpected behavior that could disrupt communication between SCADA systems and connected devices on your network.
Who's at risk
Energy utilities and power system operators using Cooper Power Systems Cybectec DNP3 Master OPC Server for SCADA communications. This includes RTU operators, substation automation engineers, and power dispatch centers that rely on DNP3 protocol for device communication and monitoring.
How it could be exploited
An attacker with network access to the DNP3 Master OPC Server could craft and send specially formatted invalid input through the DNP3 protocol or OPC interface. This could cause the server to fail input validation checks, leading to crashes, denial of service, or other unintended behavior affecting SCADA operations.
Prerequisites
  • Network access to the DNP3 Master OPC Server
  • Ability to send packets or OPC requests to the server's listening ports
Remotely exploitableNo patch availableAffects SCADA/energy systems
Exploitability
Low exploit probability (EPSS 0.5%)
Affected products (1)
ProductAffected VersionsFix Status
DNP3 Master OPC Server: vers:all/*All versionsNo fix (EOL)
Remediation & Mitigation
0/4
Do now
0/2
WORKAROUNDImplement firewall rules to restrict network access to the DNP3 Master OPC Server. Only allow connections from authorized SCADA workstations and RTUs that require DNP3 communication.
HARDENINGMonitor DNP3 traffic for malformed packets or unusual input patterns that could indicate exploitation attempts.
Mitigations - no patch available
0/2
DNP3 Master OPC Server: vers:all/* has reached End of Life. The vendor will not release a patch. Apply the following compensating controls:
HARDENINGSegment the SCADA network from corporate IT networks to limit the exposure of the DNP3 server to external threats.
HARDENINGContact Cooper Power Systems to determine long-term support options and potential replacement products, as no patch is available for this vulnerability.
View full CISA ICS-CERT advisory
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