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InduSoft Web Studio Vulnerabilities

Act NowICS-CERT ICSA-11-319-01Aug 18, 2011
Summary

InduSoft Web Studio versions 6.1 and 7.0 contain authentication bypass (CWE-287) and buffer overflow (CWE-119) vulnerabilities. The authentication bypass could allow unauthorized access to the HMI application, while the buffer overflow could cause application crashes or code execution on the affected system.

What this means
What could happen
An attacker could bypass authentication or trigger a buffer overflow in InduSoft Web Studio, potentially allowing unauthorized access to the HMI system or causing it to crash, disrupting operator visibility and control of industrial processes.
Who's at risk
Organizations operating InduSoft Web Studio 6.1 or 7.0 for human-machine interface (HMI) control should be concerned. This affects anyone using these versions for industrial automation, including manufacturing plants, water treatment facilities, electric utilities, and other process industries where the HMI is critical for operator control and monitoring.
How it could be exploited
An attacker with network access to the InduSoft Web Studio application port could send malformed input to trigger either authentication bypass (CWE-287) or a buffer overflow (CWE-119). Successful exploitation could allow the attacker to execute code on the engineering workstation or HMI server hosting the application.
Prerequisites
  • Network access to InduSoft Web Studio service ports (typically HTTP/HTTPS)
  • InduSoft Web Studio version 6.1 or 7.0 installed and running
remotely exploitableno authentication requiredno patch availablehigh EPSS score (73.1%)affects HMI/control visibility
Exploitability
High exploit probability (EPSS 73.1%)
Affected products (1)
ProductAffected VersionsFix Status
InduSoft Web Studio: 6.1|7.06.1|7.0No fix (EOL)
Remediation & Mitigation
0/4
Do now
0/3
HARDENINGImplement network segmentation to restrict access to InduSoft Web Studio systems; limit access from engineering workstations and operator stations only
HARDENINGDeploy firewall rules to block unauthorized access to InduSoft Web Studio service ports from external networks
HARDENINGMonitor InduSoft Web Studio systems for suspicious authentication attempts and unexpected process behavior
Mitigations - no patch available
0/1
InduSoft Web Studio: 6.1|7.0 has reached End of Life. The vendor will not release a patch. Apply the following compensating controls:
HARDENINGEvaluate migration path to a newer version of InduSoft Web Studio or alternative HMI platform with active vendor support
View full CISA ICS-CERT advisory
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