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AUSCERT External Security Bulletin Redistribution
ESB-2019.3447
Advisory (icsa-19-253-06) OSIsoft PI SQL Client
11 September 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: OSIsoft PI SQL Client
Publisher: ICS-CERT
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2017-9765
Original Bulletin:
https://www.us-cert.gov/ics/advisories/icsa-19-253-06
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ICS Advisory (ICSA-19-253-06)
OSIsoft PI SQL Client
Original release date: September 10, 2019
Legal Notice
All information products included in http://ics-cert.us-cert.gov 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 http://www.us-cert.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 8.1
o ATTENTION: Exploitable remotely
o Vendor: OSIsoft LLC
o Equipment: OSIsoft PI SQL Client
o Vulnerability: Integer Overflow or Wraparound
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow remote code execution
or cause a denial of service, resulting in disclosure, deletion, or
modification of information.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of OSIsoft PI SQL Client, a component interface that
enables data access via SQL queries to the PI System, are affected:
o PI SQL Client 2018 (PI SQL Client OLEDB 2018)
3.2 VULNERABILITY OVERVIEW
3.2.1 INTEGER OVERFLOW OR WRAPAROUND CWE-190
An attacker could exploit this vulnerability in a third-party component to
remotely execute code on the client computer with the same permissions as the
PI SQL Client user.
Communication with a malicious PI SQL Data Access Server (RTQP Engine) is
needed to expose a PI SQL client to this vulnerability.
CVE-2017-9765 has been assigned to this vulnerability. A CVSS v3 base score of
8.1 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:N/S:U/
C:H/I:H/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities, Critical
Manufacturing, Energy, Government Facilities, Healthcare and Public Health
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: United States
3.4 RESEARCHER
OSIsoft reported this vulnerability to CISA.
4. MITIGATIONS
OSIsoft recommends users upgrade to PI SQL Client 2018 R2 or later to resolve
this issue. To download PI SQL Client 2018 R2, please access the OSIsoft
customer portal (login required).
OSIsoft also provides the following measures to be used to avoid exploitation:
Configure the PI SQL Client OLEDB 2018 Data Link Advanced Properties to use
NetTcp (Port 5465) and delete Https/Soap (Port 5464) from the network protocol
order.
The following measures can be used to lower the likelihood of exploitation:
o Restrict PI SQL Client outbound network connections to trusted servers.
o Monitor network infrastructure for spoofing attacks on PI SQL Data Access
Servers.
o Monitor PI SQL Data Access Servers for unauthorized access.
The following measures can be used to lower the potential impact of
exploitation:
o Execute PI SQL Client using a least privilege account.
o Use application whitelisting on the PI SQL Client to block unauthorized
code execution.
For more information on this vulnerability, please refer to OSIsoft's security
bulletin (login required): OSIsoft releases security update to PI SQL Client
2018
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.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.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. High skill
level is needed to exploit.
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