Operating System:

[Win]

Published:

16 August 2013

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2013.1124
                     OSIsoft Multiple Vulnerabilities
                              16 August 2013

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

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

Product:           IEEE C37.118
Publisher:         ICS-CERT
Operating System:  Windows
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2013-2801 CVE-2013-2800 

Original Bulletin: 
   http://ics-cert.us-cert.gov/advisories/ICSA-13-225-02

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Advisory (ICSA-13-225-02)

OSIsoft Multiple Vulnerabilities

Original release date: August 13, 2013

OVERVIEW

OSIsoft has identified multiple vulnerabilities in the PI Interface for IEEE 
C37.118 and reported them to ICS-CERT. OSIsoft has produced a software update
that mitigates these vulnerabilities. OSIsoft has tested the software update 
to validate that it resolves the vulnerabilities. Exploitation of these 
vulnerabilities could allow an attacker to shut down the PI Interface for IEEE 
C37.118 instance and cause a data gap for PI points belonging to it.

These vulnerabilities could be exploited remotely.

AFFECTED PRODUCTS

The following OSIsoft PI Interfaces are affected:

    All versions of the PI Interface for IEEE C37.118 prior to Version 
    1.0.6.158.

IMPACT

Successful exploitation of these vulnerabilities could shut down the PI 
Interface for the IEEE C37.118 instance and cause a data gap for PI points 
belonging to it.

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

BACKGROUND

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

The affected product, PI Interface for IEEE C37.118, collects information from 
synchro-phasor measurement units (PMU devices). According to OSIsoft, PI 
Interface for IEEE C37.118 is deployed across electric utilities and associated
research entities. OSIsoft estimates that these products are used primarily 
in the United States and Europe with a small percentage in Asia.

VULNERABILITY CHARACTERIZATION

VULNERABILITY OVERVIEW

IMPROPER RESTRICTION OF OPERATIONS WITHIN THE BOUNDS OF A MEMORY BUFFER[a]

The PI Interface for IEEE C37.118 could read from an invalid memory address 
when processing C37.118 configuration packets. This could allow the attacker 
to shut down the PI Interface for IEEE C37.118 instance and cause a data gap 
for PI points belonging to it.

CVE-2013-2801[b] has been assigned to this vulnerability. A CVSS v2 base score
of 7.8 has been assigned; the CVSS vector string is 
(AV:N/AC:L/Au:N/C:N/I:N/A:C).[c]

IMPROPER RESTRICTION OF OPERATIONS WITHIN THE BOUNDS OF A MEMORY BUFFERa

The PI Interface for IEEE C37.118 could corrupt or exhaust memory when 
processing C37.118 configuration packets. This could allow the attacker to shut
down the PI Interface for IEEE C37.118 instance and cause a data gap for PI 
points belonging to it.

CVE-2013-2800d has been assigned to this vulnerability. A CVSS v2 base score of
7.8 has been assigned; the CVSS vector string is AV:N/AC:L/Au:N/C:N/I:N/A:C.c

VULNERABILITY DETAILS

EXPLOITABILITY

These vulnerabilities could be exploited remotely.

EXISTENCE OF EXPLOIT

No known public exploits specifically target these vulnerabilities.

DIFFICULTY

An attacker with a low skill would be able to exploit these vulnerabilities.

MITIGATION

OSIsoft has produced a software update that resolves these vulnerabilities. 
OSIsoft encourages customers using the affected product to upgrade to Version
1.0.6.158 or later. The software update can be found at the OSIsoft technical 
support Web site:

http://techsupport.osisoft.com/

ICS-CERT encourages asset owners to take additional defensive measures to 
protect against this and other cybersecurity risks.

    Minimize network exposure for all control system devices. Critical devices
    should not directly face 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 VPN is only as secure as the connected
    devices.

ICS-CERT also provides a section for control systems security recommended 
practices on the ICS-CERT Web page. Several recommended practices are available
for reading and download, including Improving Industrial Control Systems 
Cybersecurity with Defense-in-Depth Strategies.[e] ICS-CERT reminds organizations
to perform proper impact analysis and risk assessment prior to taking defensive
measures.

Additional mitigation guidance and recommended practices are publicly available
in the ICS-CERT Technical Information Paper, ICS-TIP-12-146-01B Targeted Cyber
Intrusion Detection and Mitigation Strategies,[f] that is available for download
from the ICS-CERT Web page (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-119: Improper Restriction of Operations within the Bounds of a 
       Memory Buffer,  http://cwe.mitre.org/data/definitions/119.html, Web 
       site last accessed August 13, 2013.
    b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-2801, 
       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, 
       http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:N/AC:L/Au:N/C:N/I:N/A:C
       Web site last accessed August 13, 2013.
    d. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-2800, NIST
       uses this advisory to create the CVE Web site report. This Web site will
       be active sometime after publication of this advisory.
    e. CSSP Recommended Practices, 
       http://ics-cert.us-cert.gov/content/recommended-practices, Web site last
       accessed August 13, 2013.
    f. Targeted Cyber Intrusion Detection and Mitigation Strategies, 
       http://ics-cert.us-cert.gov/tips/ICS-TIP-12-146-01B, Web site last 
       accessed August 13, 2013.

Contact Information

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

Email: ics-cert@hq.dhs.gov
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 answering a short series of questions about this product at the 
following URL: https://forms.us-cert.gov/ncsd-feedback/.

Legal

For Legal Information pertaining to this document, please consult 
http://ics-cert.us-cert.gov/Legal-Disclaimer

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