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ING. Punzenberger COPA-DATA GMBH DoS Vulnerabilities

Low RiskICS-CERT ICSA-12-013-01Oct 16, 2012
Summary

ING. Punzenberger COPA-DATA GmbH zenon 6.51_SP0 is vulnerable to denial-of-service (DoS) attacks via improper input validation and resource handling. An attacker can send crafted network packets that crash or freeze the HMI application, denying operators visibility and control of industrial processes.

What this means
What could happen
An attacker could send specially crafted network packets to crash the zenon HMI/SCADA software, causing loss of visibility and control over industrial processes until the system is manually restarted.
Who's at risk
Water and electric utilities relying on COPA-DATA zenon HMI/SCADA software for process control and monitoring. Affects operators who depend on zenon for real-time visibility into pumps, treatment processes, generators, substations, and other critical equipment.
How it could be exploited
An attacker with network access to the zenon application could send malformed input or excessive requests to trigger a denial-of-service condition, causing the HMI to become unresponsive and interrupt operator visibility and control of plant operations.
Prerequisites
  • Network access to the zenon HMI application port
  • No authentication required
remotely exploitableno authentication requiredno patch availabledenial of service impact
Exploitability
Moderate exploit probability (EPSS 1.9%)
Affected products (1)
ProductAffected VersionsFix Status
Ing. Punzenberger COPA-DATA GmbH zenon: 6.51_SP0.6.51 SP0.No fix (EOL)
Remediation & Mitigation
0/4
Do now
0/2
HARDENINGRestrict network access to zenon HMI systems using firewall rules; allow only engineering workstations and necessary control network segments
HARDENINGMaintain current backups of zenon database and configuration to enable rapid recovery if the application is crashed
Schedule — requires maintenance window
0/1

Patching may require device reboot — plan for process interruption

HARDENINGMonitor zenon application logs for unusual connection patterns or malformed requests that could indicate DoS attempts
Mitigations - no patch available
0/1
Ing. Punzenberger COPA-DATA GmbH zenon: 6.51_SP0. has reached End of Life. The vendor will not release a patch. Apply the following compensating controls:
HARDENINGImplement network segmentation to isolate zenon HMI from untrusted networks
View full CISA ICS-CERT advisory
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ING. Punzenberger COPA-DATA GMBH DoS Vulnerabilities - OTPulse