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             AUSCERT External Security Bulletin Redistribution

                               ESB-2016.1516
           OSIsoft PI SQL Data Access Server and AF Server Input
                        Validation Vulnerabilities
                               15 June 2016

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           OSIsoft PI SQL Data Access Server
                   OSIsoft PI AF Server
Publisher:         ICS-CERT
Operating System:  Windows
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-4530 CVE-2016-4518 

Original Bulletin: 
   http://ics-cert.us-cert.gov/advisories/ICSA-16-166-01
   http://ics-cert.us-cert.gov/advisories/ICSA-16-166-02

- --------------------------BEGIN INCLUDED TEXT--------------------

Advisory (ICSA-16-166-01)

OSIsoft PI SQL Data Access Server Input Validation Vulnerability

Original release date: June 14, 2016

Share

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/.

OVERVIEW

OSIsoft has identified an input validation vulnerability in its own PI SQL 
Data Access Server. OSIsoft has produced a new version of PI SQL Data Access 
Server (OLE DB) 2016 (1.5) to address this issue.

This vulnerability could be exploited remotely.

AFFECTED PRODUCTS

Affected versions of PI SQL Data Access Server prior to the 2016 (1.5) release
are included only with:

 PI JDBC Driver 2015 (1.4.1.404) and earlier, and

    	PI ODBC Driver 2015 (3.5.403) and earlier.

IMPACT

An attacker who successfully exploits this vulnerability could cause the PI 
SQL Data Access Server to stop responding in a way that may cause an 
incomplete update resulting in partial data loss.

Impact to individual organizations depends on many factors that are unique to
each organization. NCCIC/ICS-CERT recommends that organizations evaluate the 
impact of this vulnerability based on their operational environment, 
architecture, and product implementation.

BACKGROUND

OSIsoft is a US-based company that maintains headquarters in San Leandro, 
California, with global operations.

According to OSIsoft, the PI SQL Data Access Server is a component that 
supports the PI SQL family of drivers such as PI ODBC and PI JDBC. While these
drivers implement a certain industry standard or API and build the interface 
to third-party clients or applications, PI SQL Data Access Server is 
responsible for executing the queries. PI SQL Data Access Server supports 
connections and queries to the PI Data Archive and PI AF Server. PI SQL Data 
Access Server is a layered application that is not installed with every PI 
System implementation. PI Asset Framework is deployed across several critical
infrastructure sectors. These products are used worldwide.

VULNERABILITY CHARACTERIZATION

VULNERABILITY OVERVIEW

IMPROPER INPUT VALIDATION [a]

A denial-of-service impact occurs when the PI SQL Data Access Server 
improperly handles input while processing a message from an authenticated 
connection.

CVE-2016-4530 [b] has been assigned to this vulnerability. The issue was rated by
OSIsoft using the Common Vulnerability Scoring System (CVSS) [c] as Medium (CVSS:
4.0-6.9)

VULNERABILITY DETAILS

EXPLOITABILITY

This vulnerability could be exploited remotely.

EXISTENCE OF EXPLOIT

No known public exploits specifically target this vulnerability.

DIFFICULTY

An attacker with a low skill would be able to exploit this vulnerability.

MITIGATION

OSIsoft recommends upgrading to PI SQL Data Access Server (OLE DB) 2016 (1.5)
to address this issue.

OSIsoft recommends that users use a host-based firewall to limit access to 
Ports 5461 and 5462 only to trusted workstations and PI SQL client products 
such as:

    PI JDBC Driver, and

    PI ODBC Driver.

They also recommend that access to PI SQL Data Access Server be limited to 
only those users who need it through user rights assignment security policy.

For more information on this vulnerability, please refer to OSIsofts Security
Bulletin on this topic that was released on its web site on May 10, 2016:

https://techsupport.osisoft.com/Troubleshooting/PI-System-Cyber-Security (link
is external)

ICS-CERT recommends that users take defensive measures to minimize the risk of
exploitation of these vulnerabilities. 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.

ICS-CERT reminds organizations to perform proper impact analysis and risk 
assessment prior to deploying defensive measures.

ICS-CERT also provides a section for control systems security recommended 
practices on the ICS-CERT web page at: 
http://ics-cert.us-cert.gov/content/recommended-practices. 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 in the ICSCERT Technical Information Paper, 
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation 
Strategies, that is available for download from the ICS-CERT web site 
(http://ics-cert.us-cert.gov/).

Organizations observing any suspected malicious activity should follow their 
established internal procedures and report their findings to ICS-CERT for 
tracking and correlation against other incidents.

a. CWE-20: Improper Input Validation, 
http://cwe.mitre.org/data/definitions/20.html, web site last accessed June 14,
2016.

b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-4530, NIST 
uses this advisory to create the CVE web site report. This web site will be 
active sometime after publication of this advisory.

c. CVSS Calculator, https://nvd.nist.gov/cvss.cfm?adv&calculator&version=2, 
web site last accessed June 14, 2016.

Contact Information

For any questions related to this report, please contact ICS-CERT at:

Email: ics-cert@hq.dhs.gov (link sends e-mail)

Toll Free: 1-877-776-7585

International Callers: (208) 526-0900

For industrial control systems security information and incident reporting: 
http://ics-cert.us-cert.gov

ICS-CERT continuously strives to improve its products and services. You can 
help by choosing one of the links below to provide feedback about this 
product.

- ---

Advisory (ICSA-16-166-02)

OSIsoft PI AF Server Input Validation Vulnerability

Original release date: June 14, 2016

Share

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/.

OVERVIEW

OSIsoft has identified an input validation vulnerability in its own PI AF 
Server. OSIsoft has produced a new version of PI AF Server 2016 to address 
this issue.

This vulnerability could be exploited remotely.

AFFECTED PRODUCTS

OSIsoft reports that the vulnerability affects the following products:

    PI AF Server prior to 2016, versions prior to 2.8.0

The issue exists in a component that ships with the PI AF Server. This 
component is used by other OSIsoft applications but is not normally used by 
user applications or users of the PI AF SDK or PI System Explorer. This 
component can be safely disabled following defensive measures without 
impacting other PI AF Server functionality with the condition that none of the
listed OSIsoft applications are also being used.

IMPACT

An attacker who successfully exploits this vulnerability could cause the PI AF
Server to stop responding.

Impact to individual organizations depends on many factors that are unique to
each organization. NCCIC/ICS-CERT recommends that organizations evaluate the 
impact of this vulnerability based on their operational environment, 
architecture, and product implementation.

BACKGROUND

OSIsoft is a US-based company that maintains headquarters in San Leandro, 
California, with global operations.

According to OSIsoft, the PI AF Server is a repository for asset-centric 
models, hierarchies, objects, and equipment. The PI System uses this core 
server technology to provide a framework for organizing and analyzing data. 
According to OSIsoft, PI AF is deployed across several critical infrastructure
sectors. OSIsoft estimates that these products are used worldwide.

VULNERABILITY CHARACTERIZATION

VULNERABILITY OVERVIEW

IMPROPER INPUT VALIDATION [a]

A denial-of-service impact occurs when the PI AF Server improperly handles 
input while processing a message from an authenticated connection.

CVE-2016-4518 [b] has been assigned to this vulnerability. The issue was rated by
OSIsoft using the Common Vulnerability Scoring System (CVSS) [c] as Medium (CVSS:
4.0-6.9).

VULNERABILITY DETAILS

EXPLOITABILITY

This vulnerability could be exploited remotely.

EXISTENCE OF EXPLOIT

No known public exploits specifically target this vulnerability.

DIFFICULTY

An attacker with a low skill would be able to exploit this vulnerability.

MITIGATION

OSIsoft recommends upgrading to PI AF Server 2016 to address this issue.

OSIsoft recommends using a host-based firewall to limit access to Port 5459 to
only trusted workstations using PI SQL products such as PI OLEDB Enterprise. 
All versions of PI WebParts and PI Web Services will use PI OLEDB Enterprise 
for data access if it is configured as a provider for a relational data set. 
The following products access the PI AF Server 2016 over Port 5459 for search
functionality:

    PI WebParts 2010 and earlier, and

    PI Coresight 2013 and earlier.

OSIsoft also recommends that access to the PI AF Server should be limited to 
only those users who need it.

For more information on this vulnerability, please refer to OSIsofts Security
Bulletin AL00301 on this topic, which was released on OSIsofts web site on May
10, 2016:

https://techsupport.osisoft.com/Troubleshooting/PI-System-Cyber-Security (link
is external)

ICS-CERT recommends that users take defensive measures to minimize the risk of
exploitation of these vulnerabilities. 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.

ICS-CERT reminds organizations to perform proper impact analysis and risk 
assessment prior to deploying defensive measures.

ICS-CERT also provides a section for control systems security recommended 
practices on the ICS-CERT web page at: 
http://ics-cert.us-cert.gov/content/recommended-practices. 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 in the ICSCERT Technical Information Paper, 
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation 
Strategies, that is available for download from the ICS-CERT web site 
(http://ics-cert.us-cert.gov/).

Organizations observing any suspected malicious activity should follow their 
established internal procedures and report their findings to ICS-CERT for 
tracking and correlation against other incidents.

a. CWE-20: Improper Input Validation, 
http://cwe.mitre.org/data/definitions/20.html, web site last accessed June 14,
2016.

b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-4518 , NIST 
uses this advisory to create the CVE web site report. This web site will be 
active sometime after publication of this advisory.

c. CVSS Calculator, https://nvd.nist.gov/cvss.cfm?adv&calculator&version=2, 
web site last accessed June 14, 2016.

Contact Information

For any questions related to this report, please contact ICS-CERT at:

Email: ics-cert@hq.dhs.gov (link sends e-mail)

Toll Free: 1-877-776-7585

International Callers: (208) 526-0900

For industrial control systems security information and incident reporting: 
http://ics-cert.us-cert.gov

ICS-CERT continuously strives to improve its products and services. You can 
help by choosing one of the links below to provide feedback about this 
product.

- --------------------------END INCLUDED TEXT--------------------

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