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             AUSCERT External Security Bulletin Redistribution

              SCADA Engine BACnet OPC Server Vulnerabilities
                               12 March 2015


        AusCERT Security Bulletin Summary

Product:           SCADA Engine BACnet OPS Server
Publisher:         US-CERT
Operating System:  Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Modify Arbitrary Files          -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-0981 CVE-2015-0980 CVE-2015-0979

Original Bulletin: 

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Advisory (ICSA-15-069-03)

SCADA Engine BACnet OPC Server Vulnerabilities

Original release date: March 10, 2015

Legal Notice

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Independent researcher Josep Pi Rodriguez has identified three vulnerabilities
in the SCADA Engine BACnet OPC Server application. SCADA Engine has produced a
new software version that mitigates these vulnerabilities. Josep Pi Rodriguez
has tested the new software version to validate that it resolves all three 

These vulnerabilities could be exploited remotely.


The following BACnet OPC Server versions are affected:

   OPC Server prior to and including Version 2.1.359.22


The simple object access protocol (SOAP) web interface in the Windows Service
used in this product has directly contributed to all three vulnerabilities. 
Arbitrary code execution is possible.

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


SCADA Engine is a Thailand-based company that maintains offices in Thailand.

The affected product, BACnet OPC Server, provides data access, alarms and 
events, and historical data access between OPC clients and BACnet-compliant 

The BACnet protocol was developed by the American Society of Heating, 
Refrigerating, and Air-Conditioning Engineers (ASHRAE). According to SCADA 
Engine, BACnet OPC Server is generally used for building automation and 
control systems.

SCADA Engine estimates that these products are used globally.




By sending a special packet to the BACnet OPS Server, it is possible to 
trigger a heap corruption. This could allow the attacker to cause a crash or 
to execute arbitrary code.

CVE-2015-0979[b] has been assigned to this vulnerability. A CVSS v2 base score 
of 8.3 has been assigned; the CVSS vector string is 


The BACnet OPC Server contains a format string vulnerability. Sending a 
specially crafted request to BACnOPCSever.exe could possibly crash the 
service. This could allow the attacker to execute arbitrary code.

CVE-2015-0980[e] has been assigned to this vulnerability. A CVSS v2 base score 
of 7.8 has been assigned; the CVSS vector string is 


SCADA Engine Bacnet OPC Server has a vulnerability that allows an attacker to
insert, read, or delete any items in the database.

CVE-2015-0981[h] has been assigned to this vulnerability. A CVSS v2 base score 
of 10 has been assigned; the CVSS vector string is 



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.


SCADA Engine has developed and deployed a new software version, that can be 
downloaded at this URL:


This new version of software has removed the SOAP web interface in the Window
Service and replaced that with a proprietary communications protocol. In 
addition, requests from other personal computers are blocked to prevent 
attacks from another personal computer.

All installation and technical information requests should be sent to:


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 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 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. 
ICS-CERT reminds organizations to perform proper impact analysis and risk 
assessment prior to deploying 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, 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-122: Heap-based Buffer Overflow, 
http://cwe.mitre.org/data/definitions/122.html, web site last accessed March 
10, 2015.

b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-0979, 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:M/Au:N/C:P/I:P/A:C, web
site last accessed March 10, 2015.

d. CWE-20: Improper Input Validation, 
http://cwe.mitre.org/data/definitions/20.html, web site last accessed March 
10, 2015.

e. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-0980, 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, 
http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:N/AC:M/Au:N/C:P/I:N/A:C, web
site last accessed March 10, 2015.

g. CWE-287: Improper Authentication, 
http://cwe.mitre.org/data/definitions/287.html, web site last accessed March 
10, 2015.

h. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-0981, NIST 
uses this advisory to create the CVE web site report. This web site will be 
active sometime after publication of this advisory.

i. CVSS Calculator, 
http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:N/AC:L/Au:N/C:C/I:C/A:C, web
site last accessed March 10, 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: 

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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