Schneider Electric Wonderware Vulnerabilities
Low RiskICS-CERT ICSA-14-238-02May 29, 2014
Summary
Schneider Electric Wonderware Information Server Portal versions 4.0_SP1, 4.5, 5.0, and 5.5 contain multiple input validation and encoding flaws (CWE-326, CWE-79, CWE-20, CWE-89). These weaknesses allow remote attackers to inject SQL commands and JavaScript code without authentication, potentially leading to unauthorized data access, data manipulation, cross-site scripting attacks, and compromise of process information displayed to operators. The vulnerabilities exist in the portal's handling of user-supplied input and cryptographic implementations.
What this means
What could happen
An attacker could inject malicious code into the Wonderware Information Server Portal or manipulate data transmitted to the application, potentially altering process information displayed to operators or interfering with remote monitoring and control capabilities.
Who's at risk
Energy sector operators using Wonderware Information Server Portal for remote monitoring and SCADA data visualization should be concerned. This includes electric utilities and industrial facilities that rely on the portal to display real-time process information and operator interfaces. The vulnerability affects all supported versions of the portal.
How it could be exploited
An attacker with network access to the Wonderware Information Server Portal could inject malicious input through web forms or API endpoints. The application does not properly validate or sanitize user input, allowing injection of SQL commands or JavaScript code that executes in the portal environment, affecting data integrity and operator visibility.
Prerequisites
- Network access to the Wonderware Information Server Portal web interface
- No authentication required to exploit the vulnerability
- Ability to send crafted HTTP requests to the portal
Remotely exploitableNo authentication requiredNo patch availableAffects monitoring and control visibilityWeb application injection vulnerabilities
Exploitability
Low exploit probability (EPSS 0.4%)
Affected products (4)
4 pending
ProductAffected VersionsFix Status
Wonderware Information Server Portal: 4.0_SP14.0 SP1No fix yet
Wonderware Information Server Portal: 4.54.5No fix yet
Wonderware Information Server Portal: 5.05.0No fix yet
Wonderware Information Server Portal: 5.55.5No fix yet
Remediation & Mitigation
0/6
Do now
0/3HARDENINGRestrict network access to the Wonderware Information Server Portal using firewall rules—only allow access from authorized engineering workstations and HMI systems
WORKAROUNDDeploy a Web Application Firewall (WAF) in front of the portal to filter malicious input and block SQL injection and cross-site scripting (XSS) attempts
HARDENINGEnable input validation and output encoding at the application level if available through configuration
Schedule — requires maintenance window
0/1Patching may require device reboot — plan for process interruption
HARDENINGMonitor and log all access to the Wonderware Information Server Portal; alert on suspicious activity patterns
Long-term hardening
0/2HARDENINGSegment the Wonderware network from corporate IT and the internet using a demilitarized zone (DMZ)
HOTFIXPlan for replacement or upgrade of Wonderware Information Server Portal to a supported version
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