Operating System:

[Appliance]

Published:

23 September 2015

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2015.2477
       Everest Software PeakHMI Pointer Dereference Vulnerabilities
                             23 September 2015

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

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

Product:           Everest Software PeakHMI
Publisher:         US-CERT
Operating System:  Network Appliance
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-6454  

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-15-232-01

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Advisory (ICSA-15-232-01)

Everest Software PeakHMI Pointer Dereference Vulnerabilities

Original release date: September 22, 2015

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

This advisory was originally posted to the US-CERT secure Portal library on 
August 20, 2015, and is being released to the NCCIC/ICS-CERT web site.

Independent researcher Josep Pi Rodriguez has identified two-pointer 
dereference vulnerabilities in the Everest Software LLC PeakHMI application. 
Everest Software LLC has produced a new version to mitigate these 
vulnerabilities. Josep Pi Rodriguez has tested the new version to validate 
that it resolves the vulnerabilities.

These vulnerabilities could be exploited remotely.

AFFECTED PRODUCTS

Everest Software LLC reports that the vulnerabilities affect the following 
versions of PeakHMI:

    PeakHMI versions prior to 8.7.0.2

IMPACT

An attacker who exploits these vulnerabilities while the video server is 
enabled could remotely crash the service.

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

Everest Software LLC is a United States-based company.

The affected product, PeakHMI, is a human-machine interface (HMI) product used
in industrial control systems. According to Everest Software LLC, PeakHMI 
products are deployed across most sectors. Everest Software LLC estimates that
these products are used primarily in the United States but are deployed 
worldwide.

VULNERABILITY CHARACTERIZATION

VULNERABILITY OVERVIEW

POINTER DEREFERENCE [a]

The researcher found two separate instances where a specially crafted packet 
could cause the program to dereference a pointer. This can only be exploited 
when the video server is enabled.

CVE-2015-6454 [b] has been assigned to these vulnerabilities. A CVSS v2 base 
score of 5.0 has been assigned; the CVSS vector string is 
(AV:N/AC:L/Au:N/C:N/I:N/A:P). [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

Everest Software LLC has addressed these problems in the latest version 
(8.7.0.2) of PeakHMI. Users can check for a new version anytime from within 
the program and get an update if so desired. There is no charge for upgrades 
or updates. Users can also find the new version on the PeakHMI web site:

http://peakhmi.com/

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

Carefully monitor or block traffic to Port 49454.

Disable the video server if it is not being used. This video server is 
only for remote HMI video support. (It is disabled by default on installation)

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-12-146-01BTargeted Cyber Intrusion Detection and Mitigation 
Strategies, that is available for download from the ICS-CERT web site 
(www.ics-cert.org).

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-822: Untrusted Pointer Dereference, 
http://cwe.mitre.org/data/definitions/822.html, web site last accessed August
20, 2015.

b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-6454, 
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:P, web
site last accessed August 20, 2015.

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 choosing one of the links below to provide feedback about this 
product.

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