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             AUSCERT External Security Bulletin Redistribution

            KMC Controls Conquest BACnet Router Vulnerabilities
                                9 June 2016


        AusCERT Security Bulletin Summary

Product:           KMC Controls Conquest BACnet Router
Publisher:         US-CERT
Operating System:  Network Appliance
Impact/Access:     Cross-site Request Forgery -- Remote with User Interaction
                   Access Confidential Data   -- Existing Account            
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-4495 CVE-2016-4494 

Original Bulletin: 

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Advisory (ICSA-16-126-01)

KMC Controls Conquest BACnet Router Vulnerabilities

Original release date: June 07, 2016

Legal Notice

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(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/.


This advisory was originally posted to the US-CERT secure Portal library on 
May 5, 2016, and is being released to the NCCIC/ICS-CERT web site.

Independent researcher Maxim Rupp has identified authentication and cross-site
request forgery (CSRF) vulnerabilities in KMC Controls Conquest BACnet routers
through its web interface. KMC Controls has produced new firmware to mitigate
these vulnerabilities. Maxim Rupp has tested the new firmware to validate that
it resolves the vulnerabilities.

These vulnerabilities could be exploited remotely.


KMC Controls reports that the vulnerabilities affect the following products:

    BAC-5051E routers, firmware versions prior to E0.2.0.2


An unauthorized user can exploit these vulnerabilities to read the 
configuration of the target device.

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.


KMC Controls is based in the United States.

The affected products, BAC-5051E routers, are used in building automation 
systems. According to KMC Controls, BAC-5051E routers are used in Commercial 
Facilities. KMC Controls estimates that these products are used in the 
Americas, the Middle East, and Southeast Asia.




An unauthorized user can use a CSRF attack to read configuration data from a 

CVE-2016-4494 [b] has been assigned to this vulnerability. A CVSS v3 base 
score of 5.3 has been calculated; the CVSS vector string is 
(AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N). [c]


A missing authorization check allows an unauthorized user to read 
configuration data from a file.

CVE-2016-4495 [e] has been assigned to this vulnerability. A CVSS v3 base 
score of 5.3 has been calculated; the CVSS vector string is 
(AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N). [f]



These vulnerabilities could be exploited remotely.


No known public exploits specifically target these vulnerabilities.


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


KMC Controls has released firmware Version E0.2.0.2 for the BAC-5051E router 
to add additional security for web-based access to the routers configuration 
pages. KMC Controls recommends that all BAC-5051E routers be upgraded to this
version. Users can obtain the latest version of the firmware in the KMC 
Controls partner portal (requires a login).


According to KMC Controls, the BAC-5051E router is not intended to be a public
facing Internet device. For best security, install the router behind a 
firewall inside a sites intranet network. KMC Controls has also sent a copy of
its technical bulletin to users. A copy of this bulletin can be found on KMC 
Controls web site in the service bulletin section.

ICS-CERT recommends, as quality assurance, that users test the update in a 
test development environment that reflects their production environment prior
to installation. In addition, 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 

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-352: Cross-Site Request Forgery (CSRF), 
http://cwe.mitre.org/data/definitions/352.html, web site last accessed June 
07, 2016.

b. NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-4494, 
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, 
web site last accessed June 07, 2016.

d. CWE-306: Missing Authentication for Critical Function, 
http://cwe.mitre.org/data/definitions/306.html, web site last accessed June 
07, 2016.

e. NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-4495, 
NIST uses this advisory to create the CVE web site report. This web site will
be active sometime after publication of this advisory.

f. CVSS Calculator, 
web site last accessed June 07, 2016.

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: 

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 

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