GE Proficy HMI/SCADA Cimplicity Integer Overflow

CVEs (1)

Remediations

• GE has released a security advisory and patches to address this issue. Patches for versions of CIMPLICITY prior to Version 8.0 will not be created. GE recommends customers who are unable to patch or upgrade consider the recommendations below. GE has provided the following workaround recommendations that eliminate the need to use the vulnerable component:
• Option 1: Disable the CIMPLICITY built-in Web server if it is not in use. GlobalView, WebView, and ThinView expose the existing functionality of the CIMPLICITY HMI application so that it can be viewed via a Web browser. If this functionality is not required, Web-based access can be disabled by the following process: 1. Open CIMPLICITY Options. 2. Select the “WebView/ThinView” tab. a. Uncheck the “Use built-in Web server” option. b. Uncheck the “Start at boot time” option. 3. Select the “GlobalView” tab (if GlobalView is installed). Uncheck the “Use built-in Web server” option. Uncheck the “Start at boot time” option. 4. Click “OK.”
• Option 2: Use an alternate Web server to host GlobalView, WebView, or ThinView. The CIMPLICITY built-in Web server can be replaced with a third-party Web application server such as Microsoft IIS. To configure GlobalView, WebView, or ThinView to use IIS: 1. Clear the “Use built-in Web server” check box on the WebView/ThinView and GlobalView tabs of the CIMPLICITY Options dialog box. 2. Copy the ProwlerClient.jar file from the WebPages directory of your CIMPLICITY installation to an IIS Web server directory. 3. In the WebView/ThinView or GlobalView tab of CIMPLICITY Options, click on “Create a Web Page” to create an HTML file for your Web server. Use the “Browse Page” button to navigate to the directory where you’d like to save the page.
• Important: If you would like to publish the Web page to Microsoft IIS, make sure you save the Web page to an IIS Web directory. By default, this is C:\InetPub\wwwroot or a subdirectory, but it could be another location depending on your IIS configuration. You can save the page by clicking the “Browse Page” button and navigating to the directory or by saving the file to another location and copying it to an IIS directory later.
• The vulnerable service (CimWebServer.exe) will still run on the system in the “Option 2” configuration. However, because it is no longer listening on a port that is processing HTTP traffic, the vulnerability is not exposed.
• As with any third-party product, ensure that your IIS Web server is up to date with the latest security patches and follow any secure configuration recommendations from the vendor.

Affected Vendors

Affected Products (2)