Rockwell Automation created an update to mitigate an access violation memory error in its Integrated Architecture Builder (IAB) application, according to a report on ICS-CERT.
The following IAB versions suffer from the vulnerability, discovered by Ivan Sanchez from Nullcode Team:
• Integrated Architecture Builder, Versions 184.108.40.206 and earlier, and
• Integrated Architecture Builder, Versions 220.127.116.11 and 18.104.22.168
A successful attack would allow an attacker to execute malicious code on the target computer at the same privilege level as the IAB tool.
Milwaukee, WI-based Rockwell Automation provides industrial automation control and information products worldwide across a wide range of industries.
The affected product, IAB, sees use in configuring Logix-based automation systems used in industrial control systems. IAB sees action across several sectors including critical manufacturing, energy, and water and wastewater systems. Rockwell Automation said the product sees use on a global basis.
Execution of a maliciously crafted or altered project file can allow the execution of unknown code on the affected computer. If successful, such unknown code will run at the same privilege level as the user logged into the machine.
CVE-2016-2277 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 6.3.
This vulnerability is not exploitable remotely and cannot end up exploited without user interaction. The exploit only triggers when a local user runs the vulnerable application and loads the malformed project file.
No known public exploits specifically target this vulnerability. In addition, crafting a working exploit for this vulnerability would be difficult. Social engineering is required to convince the user to introduce or replace project files. Additional user interaction would end up needed to load the malformed file. This decreases the likelihood of a successful exploit.
Rockwell Automation recommends users upgrade to the newest available software versions to mitigate the threat of this vulnerability. They also recommend the following steps:
• Do not open untrusted project files with IAB.exe.
• Upgrade Integrated Architecture Builder V22.214.171.124 and earlier to either V126.96.36.199+ or V188.8.131.52+ (available now) using Current Program Updater. Current Program Updater is a program that is installed on the user’s computer when Integrated Architecture Builder is installed.
• For additional information, please refer to the user guide which is built into the Current Program Updater application.
• Run all software as “User,” not as an “Administrator,” to minimize the impact of malicious code on the infected system.
• Use trusted software, software patches, antivirus/antimalware programs and interact only with trusted web sites and attachments.
• Employ training and awareness programs to educate users on the warning signs of a phishing or social engineering attack.
• 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 devices behind firewalls, and isolate them from the business network.
• Use of Microsoft AppLocker or other similar whitelisting applications can help mitigate risk. Click here for more information on using AppLocker with Rockwell Automation products.
Click here for Rockwell Automation’s security notification, the user must have a valid account.
For more information on this vulnerability and more detailed mitigation instructions, see Rockwell Automation’s public security web page.