ICS-CERT: 7T IGSS Graphical SCADA System Vulnerability

Tuesday, January 17, 2012

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ICS-CERT originally released Advisory ICSA-11-353-01P on the US-CERT secure portal on December 19, 2011. This web page release was delayed to allow users time to download and install the update.

Researcher Kuang-Chun Hung of Security Research and Service Institute Information and Communication Security Technology Center (ICST) has identified an unsafe search path vulnerability in the 7-Technologies (7T) IGSS Interactive Graphical SCADA System.

7T produced a patch that fixes this vulnerability. ICST tested this patch and verified that it fully resolves this vulnerability.

AFFECTED PRODUCTS

The following 7T Interactive Graphical SCADA System versions are affected:

• All versions prior to V9.0.0.11291.

IMPACT

Successful exploitation of this vulnerability may allow an attacker using social engineering to execute arbitrary code and gain the same privileges as the user that is currently logged into the system.

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

BACKGROUND

7T, based in Denmark, creates monitoring and control systems that are primarily used in the United States, Europe, and South Asia. According to the 7T website, IGSS has been deployed in over 28,000 industrial plants in 50 countries worldwide.

7T Interactive Graphical SCADA system software is used to control and monitor programmable logic controllers in industrial processes across multiple sectors including energy, manufacturing, oil and gas, and water.

VULNERABILITY OVERVIEW

To successfully exploit this vulnerability, an attacker would need to place a malicious DLL in the search path of an executable program. CVE-2011-4053 has been assigned to this vulnerability.

EXPLOITABILITY

This vulnerability is remotely exploitable but may require social engineering.

EXISTENCE OF EXPLOIT

No known public exploits specifically target this vulnerability.

DIFFICULTY

An attacker with a low skill level can execute this DLL hijack attack.

MITIGATION

7T developed a patch to address this vulnerability and provided the following options for updating their systems:

1. In the IGSSMaster application select the menu “Information and support” and click “Update IGSS Software.” This will automatically download and install the updated module. This is the preferred method for updating the IGSS installation when the host computer has Internet access.

2. Go to the www.igss.com website, select the menu item "Download => Licensed Versions" and click the link "Program updates (General)" for Version 9. This will download a .zip file containing all current updates for IGSS Version 9.

Once the progupdatesv90.zip file is downloaded, manually unpack the .zip file and copy the contents to the \IGSS\ directory within the IGSS installation folder at the end-user’s computer.

The full ICS-CERT advisory can be found here:

Source:  http://www.us-cert.gov/control_systems/pdf/ICSA-11-353-01.pdf

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US-CERT
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SCADA Social Engineering Vulnerabilities Remote Access Privilege Escalation Advisory ICS ICS-CERT Industrial Control Systems 7-Technologies IGSS Interactive Graphical SCADA System Kuang-Chun Hung ICST DLL hijack attack
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