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AUSCERT External Security Bulletin Redistribution
ESB-2020.4027
Advisory (icsa-20-315-02) OSIsoft PI Vision
12 November 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: OSIsoft PI Vision
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Modify Arbitrary Files -- Existing Account
Cross-site Scripting -- Existing Account
Access Confidential Data -- Existing Account
Unauthorised Access -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-25167 CVE-2020-25163
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-20-315-02
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ICS Advisory (ICSA-20-315-02)
OSIsoft PI Vision
Original release date: November 10, 2020
Legal Notice
All information products included in https://us-cert.cisa.gov/ics are
provided"as is" for informational purposes only. The Department of Homeland
Security (DHS) does not provide any warranties of any kind regarding any
information contained within. DHS does not endorse any commercial product or
service, referenced in this product or otherwise. Further dissemination of this
product is governed by the Traffic Light Protocol (TLP) marking in the header.
For more information about TLP, see https://us-cert.cisa.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 7.7
o ATTENTION: Exploitable remotely/low skill level to exploit
o Vendor: OSIsoft
o Equipment: PI Vision 2020
o Vulnerabilities: Cross-site Scripting, Incorrect Authorization
2. RISK EVALUATION
Successful exploitation of these vulnerabilities may allow a remote attacker
with write access to the PI ProcessBook files to inject code that is imported
into PI Vision, or disclose information to a user with insufficient privileges.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
All versions prior to PI Vision 2020 are affected.
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION ('CROSS-SITE
SCRIPTING') CWE-79
A remote attacker with write access to PI ProcessBook files could inject code
that is imported into PI Vision. Unauthorized information disclosure,
modification, or deletion is also possible if a victim views or interacts with
the infected display. This vulnerability affects PI System data and other data
accessible with victim's user permissions.
CVE-2020-25163 has been assigned to this vulnerability. A CVSS v3 base score of
7.7 has been assigned; the CVSS vector string is ( AV:N/AC:H/PR:L/UI:R/S:C/C:H/
I:H/A:N ).
3.2.2 INCORRECT AUTHORIZATION CWE-863
PI Vision could disclose information to a user with insufficient privileges for
an AF attribute.
CVE-2020-25167 has been assigned to this vulnerability. A CVSS v3 base score of
4.9 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:H/UI:N/S:U/C:H/
I:N/A:N ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Multiple
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: United States
3.4 RESEARCHER
OSIsoft reported these vulnerabilities to CISA.
4. MITIGATIONS
OSIsoft released PI Vision 2020 Version 3.5.0, which resolves these
vulnerabilities.
Recommended defensive measures and related configuration settings are described
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:
o Minimize network exposure for all control system devices and/or systems,
and ensure that they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
o 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.
CISA also recommends users take the following measures to protect themselves
from social engineering attacks:
o Do not click web links or open unsolicited attachments in email messages.
o Refer to Recognizing and Avoiding Email Scams for more information on
avoiding email scams.
o Refer to Avoiding Social Engineering and Phishing Attacks for more
information on social engineering attacks.
No known public exploits specifically target these vulnerabilities.
For any questions related to this report, please contact the CISA at:
Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870
CISA continuously strives to improve its products and services. You can help by
choosing one of the links below to provide feedback about this product.
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