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Rockwell Automation created new software that mitigates two custom ActiveX Component vulnerabilities in its Connected Components Workbench (CCW) application version, according to a report on ICS-CERT.

Independent researcher Andrea Micalizzi working through ZDI discovered the remotely exploitable vulnerabilities.

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Rockwell Automation CCW Version 6.01.00 and earlier suffers from the issue.

Successful exploitation of these vulnerabilities can result in an attacker writing arbitrary code to the address of an object not normally accessible or allowable.

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Milwaukee, WI-based Rockwell Automation provides industrial automation control and information products worldwide across a wide range of industries.

The affected product, Rockwell Automation’s CCW software, is a design and configuration application and HMI editor for programming certain micro controllers and component-class industrial products. According to Rockwell Automation, CCW software sees global use across multiple sectors in a variety of industrial applications.

The reported CCW ActiveX vulnerabilities are the result of a software coding error further compounded by the use of an older version of a compiler used to create the custom ActiveX components. The vulnerabilities allow an attacker to send an arbitrary, out of range values to a particular property of an affected ActiveX component, crashing its operation; then potentially allow for an execution of unauthorized code on the computer hosting the software.

Neither the CCW software, nor the vulnerable ActiveX components necessarily need to be running for an attack to be successful.

The attack vector to exploit these vulnerabilities requires a user with local access to the computer containing a susceptible ActiveX component and a container to either knowingly or unknowingly execute some form of malicious code. Such code could likely end up delivered via the loading of an infected web page or some document opened in a web browser or other container capable of running ActiveX controls. An attack scenario could begin with a phishing attack, whereby a victim opens and runs a malicious HTML file or other such infected file, or to visit a maliciously altered web page tailored to specifically exploit these vulnerabilities in an affected ActiveX component.

CVE-2014-5424 is the case number assigned to these two ActiveX vulnerabilities, which has a CVSS v2 base score of 7.5.

These vulnerabilities could end up exploited locally and remotely via a successful social engineering attack.

No known public exploits specifically target these vulnerabilities. An attacker with a low skill would be able to exploit these vulnerabilities.

Rockwell released a new software build, Version 7.00.00, to address associated risk. This new software version resolves the vulnerabilities present in previous versions of CCW software. All customers using CCW software prior to Version 7.00.00 should upgrade to Version 7.00.00 or higher at their earliest convenience.

The Rockwell Automation Support Center published “626689 – Connected Components Workbench (CCW) ActiveX Component Vulnerability.” This document contains technical information about these vulnerabilities, risk mitigation, remediation actions, a URL link to obtain the new software, and installation instructions. You must be a registered user to access this web site.

Rockwell Automation directs users to refer to the following URL for comprehensive information about implementing best practices and recommendations on validated architectures.

Rockwell Automation also recommends users to monitor:
• Rockwell Automation’s Security Advisory Index (AID:54102)
• Rockwell security for new and relevant information

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