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OSIsoft PI Vision

Monitor6.5ICS-CERT ICSA-21-313-05Nov 9, 2021
Attack VectorNetwork
Auth RequiredLow
ComplexityHigh
User InteractionRequired
Summary

OSIsoft PI Vision versions before 2021 contain cross-site scripting (CWE-79) and improper access control (CWE-863) vulnerabilities. These vulnerabilities could allow an authenticated user to inject malicious scripts into displays or bypass role-based access controls to view, modify, or delete process data and displays beyond their assigned permissions. The vulnerability is limited in scope to permissions granted to the PI Vision Application Pool Identity. CVSS v3.0 score is 6.5 (AV:N/AC:H/PR:L/UI:R/S:C). No known public exploits exist.

What this means
What could happen
An attacker with valid PI Vision credentials could view, modify, or delete process data and displays through cross-site scripting and improper access control, potentially exposing sensitive industrial process information or disrupting visualization of plant operations.
Who's at risk
Water and electric utilities using OSIsoft PI Vision for real-time monitoring and process display should care. This affects anyone relying on PI Vision dashboards to visualize plant operations, especially operators and engineers who depend on accurate and authorized access to process data and controls.
How it could be exploited
An attacker with valid PI Vision user credentials could inject malicious scripts into displays (CWE-79 stored XSS) or exploit insufficient role-based access controls (CWE-863) to access data or modify displays they should not have permission to change. The attacker needs to be a authenticated PI Vision user and may need to convince a legitimate user to click a malicious link or perform an action that triggers the vulnerability.
Prerequisites
  • Valid PI Vision user credentials (any role)
  • Network access to PI Vision web application
  • Victim user must interact with attacker-supplied content (link, display, or data)
Remotely exploitableLow authentication barrier (any valid user)Requires user interaction (UI:R)Affects data confidentiality and integrityNo patch available for versions before 2021
Exploitability
Low exploit probability (EPSS 0.1%)
Affected products (1)
ProductAffected VersionsFix Status
PI Vision - < 2021< 20212021
Remediation & Mitigation
0/6
Do now
0/3
WORKAROUNDConfigure Publisher and Explorer roles in PI Vision User Access Levels to restrict which users can create or modify displays
WORKAROUNDRemove any Limits properties from AF child attributes using PI System Explorer or a bulk editing tool
HARDENINGUse only modern web browsers (Microsoft Edge, Google Chrome, Mozilla Firefox) and disable Internet Explorer access to PI Vision
Schedule — requires maintenance window
0/1

Patching may require device reboot — plan for process interruption

HOTFIXUpgrade to OSIsoft PI Vision 2021 or later
Long-term hardening
0/2
HARDENINGRegularly audit the AF (Asset Framework) hierarchy to ensure no unexpected elements, attributes, or properties exist
HARDENINGConfigure dedicated identity mapping for PI Vision Application Pool and manage permissions according to data classification policy
View full CISA ICS-CERT advisory
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