1. EXECUTIVE SUMMARY
- CVSS v3 8.1
- ATTENTION: Exploitable remotely/low skill level to exploit
- Vendor: OSIsoft
- Equipment: PI Interface
- Vulnerability: Numeric Errors
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker-controlled OPC XML-DA Server to respond with a crafted XML message and exploit the PI Interface for OPC XML-DA, resulting in code execution.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
All versions of PI Interface for OPC XML-DA prior to 1.7.3.x are affected.
3.2 VULNERABILITY OVERVIEW
3.2.1 NUMERIC ERRORS CWE-189
The affected product is vulnerable to a stack-based buffer overflow, which may allow an attacker to remotely execute arbitrary code.
- CRITICAL INFRASTRUCTURE SECTORS: Multiple
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: United States
OSIsoft reported this vulnerability to CISA.
Upgrade to PI Interface for OPC XML-DA Version 1.7.3.x to remove this vulnerability.
Security bulletin and access to security update is available on the OSIsoft customer portal (login required).
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
- Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet.
- Locate control system networks and remote devices behind firewalls, and isolate them from the business network.
- When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize that VPN is only as secure as the connected devices.
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on us-cert.cisa.gov. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on us-cert.cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents.
No known public exploits specifically target this vulnerability.