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Advantech WebAccess Vulnerabilities

Low RiskICS-CERT ICSA-14-261-01Jun 21, 2014
Summary

Advantech WebAccess 7.2 contains a buffer overflow vulnerability (CWE-119) that allows remote code execution on systems running the application. The vulnerability is remotely exploitable and affects organizations using WebAccess for SCADA and industrial process monitoring. No vendor patch is available for this version.

What this means
What could happen
An attacker with network access to WebAccess could execute arbitrary code with the privileges of the WebAccess application, potentially allowing them to modify process data, alter alarm thresholds, or disrupt monitoring and control of critical infrastructure systems.
Who's at risk
Water utilities and electric utilities using Advantech WebAccess 7.2 for SCADA monitoring and control systems. Specifically affects organizations relying on WebAccess for remote plant operations, alarm management, and data visualization.
How it could be exploited
An attacker would exploit a buffer overflow vulnerability (CWE-119) in WebAccess 7.2 by sending a specially crafted network request to the application. If successful, this allows arbitrary code execution on the machine running WebAccess.
Prerequisites
  • Network access to the WebAccess application port
  • WebAccess 7.2 running and accessible
remotely exploitablebuffer overflow vulnerabilityno patch availableaffects critical infrastructure monitoring
Exploitability
Moderate exploit probability (EPSS 1.7%)
Affected products (1)
ProductAffected VersionsFix Status
WebAccess: 7.27.2No fix (EOL)
Remediation & Mitigation
0/4
Do now
0/2
HARDENINGImplement network segmentation and firewall rules to restrict access to WebAccess to only authorized engineering and monitoring stations
WORKAROUNDDisable or limit remote access to WebAccess if not operationally necessary
Mitigations - no patch available
0/2
WebAccess: 7.2 has reached End of Life. The vendor will not release a patch. Apply the following compensating controls:
HARDENINGMonitor WebAccess logs for suspicious activity or unexpected code execution attempts
HARDENINGEvaluate upgrading to a newer version of Advantech software that addresses this vulnerability
View full CISA ICS-CERT advisory
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