Mitigations for SIMATIC RF Manager

Monday, January 14, 2013 @ 06:01 PM gHale


There are mitigation details for a vulnerability that affects the Siemens SIMATIC RF Manager, according to a report on ICS-CERT.

Siemens found a buffer overflow vulnerability in the ActiveX component of the SIMATIC RF Manager and now provided a patch that mitigates the vulnerability. Successful exploitation of this remotely exploitable vulnerability could lead to possible remote code execution or a denial of service.

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The following Siemens products suffer from the problem:
• SIMATIC RF Manager 2008, and
• SIMATIC RF Manager Basic v3.0 and lower (as distributed with RF670R and RF 640R).

The RF Manager uses ActiveX, which can also end up accessed within Internet browsers. A user would have to visit a malicious Web site on the system where RF Manager resides to exploit the vulnerability.

By exploiting this vulnerability, an attacker could execute remote code and could cause a denial of service of the RF Manager. This could impact the setup of systems in the critical manufacturing, health and healthcare, power generation and distribution, food and beverage, and chemical industries.

Products in the Siemens SIMATIC RF Manager family manage connected radio frequency identification (RFID) readers to SIMATIC S7 controllers. This includes collecting supplied data, and compressing this data for enterprise systems, such as the Enterprise Resource Management (ERP) layer and Manufacturing Execution Systems (MES) layer. ERP and MES are widely used in industrial environments such as critical manufacturing, health and healthcare, power generation and distribution, food and beverage, and chemical industries worldwide.

The SIMATIC RF Manager uses an ActiveX component. This component also ends up shared with other programs, such as Internet browsers. If a user has installed the SIMATIC RF Manager’s ActiveX applications on the system and visits a malicious Web site, code within the ActiveX components can end up executed, causing a buffer overflow. This could allow an attacker to execute arbitrary code in the browser context and possibly take control of the system.

CVE-2013-0656 is the number assigned to this vulnerability, which has a CVSS v2 base score of 6.8.

There are no public exploits specifically targeting this vulnerability. Exploiting this vulnerability could be difficult. Social engineering of some sort would need to convince the user to visit a malicious Web site using the system containing the SIMATIC RF Manager. This decreases the likelihood of a successful exploit.

Siemens released a Siemens Security Advisory (SSA-099471: Buffer Overflow in SIMATIC RF Manager) that details this vulnerability and provides mitigations. Siemens released a software patch that mitigates the vulnerability. Siemens requests that users contact Siemens’ customer support to obtain the patch.



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