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AUSCERT External Security Bulletin Redistribution
ESB-2015.0824
Ecava IntegraXor DLL Vulnerabilities
1 April 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: Ecava IntegraXor
Publisher: US-CERT
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2015-0990
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-15-090-02
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Advisory (ICSA-15-090-02)
Ecava IntegraXor DLL Vulnerabilities
Original release date: March 31, 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
Security researcher Praveen Darshanam has identified two DLL loading
vulnerabilities in Ecavas IntegraXor SCADA Server. Ecava has produced a patch
that mitigates these vulnerabilities. Praveen Darshanam has tested the patch
to validate that it resolves the vulnerabilities.
AFFECTED PRODUCTS
The following SCADA Servers are affected:
IntegraXor SCADA Server prior to Version 4.2.4488
IMPACT
Loading and executing an insecure DLL is equivalent to running malicious code
at the privilege level of the application that uses the DLL.
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.
BACKGROUND
Ecava Sdn Bhd (Ecava) is a Malaysia-based software development company that
provides the IntegraXor SCADA product. Ecava specializes in factory and
process automation solutions.
The affected product, IntegraXor, is a suite of tools used to create and run a
web-based human-machine interface for a SCADA system. According to Ecava,
IntegraXor is deployed across several sectors including Critical
Manufacturing, Energy, Water and Wastewater Systems, and others. Ecava
estimates that this product is used in 38 countries, with the largest
installations based in the United Kingdom, the United States, Australia,
Poland, Canada, and Estonia.
VULNERABILITY CHARACTERIZATION
VULNERABILITY OVERVIEW
UNCONTROLLED SEARCH PATH ELEMENT[a]
An attacker could rename a malicious DLL to meet the criteria of the
applications, and the applications would not verify the DLL is correct. The
attacker needs to have administrative access to the default install location
in order to plant the insecure DLL. Once loaded by either application, the DLL
could run malicious code at the privilege level of the application.
CVE-2015-0990[b] has been assigned to these vulnerabilities. A CVSS v2 base
score of 6.8 has been assigned; the CVSS vector string is
(AV:L/AC:L/Au:S/C:C/I:C/A:C).[c]
VULNERABILITY DETAILS
EXPLOITABILITY
These vulnerabilities are not exploitable remotely without user interaction.
These exploits are only triggered when a local user runs the vulnerable
application after loading the malicious DLL file.
EXISTENCE OF EXPLOIT
No known public exploits specifically target these vulnerabilities.
DIFFICULTY
Crafting a working exploit for these vulnerabilities would be difficult.
Social engineering is required to convince the user to load the malicious DLL
file. Additional user interaction is needed to load the malformed file. This
decreases the likelihood of a successful exploit.
MITIGATION
Ecava recommends users download and install the patch at the following
location:
http://www.integraxor.com/download/rc.msi?4.2.4488
ICS-CERT recommends that users take the following measures to protect
themselves from social engineering attacks:
Do not click web links or open unsolicited attachments in email messages.
Refer to Recognizing and Avoiding Email Scams[d] for more information on
avoiding email scams.
Refer to Avoiding Social Engineering and Phishing Attacks[e] for more
information on social engineering attacks
In addition, 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
(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-427: Uncontrolled Search Path Element,
http://cwe.mitre.org/data/definitions/427.html, web site last accessed March
31, 2015.
b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-0990,
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:L/AC:L/Au:S/C:C/I:C/A:C, web
site last accessed March 31, 2015.
d. Recognizing and Avoiding Email Scams,
http://www.us-cert.gov/reading_room/emailscams_0905.pdf, web site last
accessed March 31, 2015.
e. National Cyber Alert System Cyber Security Tip ST04-014,
http://www.us-cert.gov/cas/tips/ST04-014.html, web site last accessed March
31, 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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