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Critical Vulnerability Fixed in Schneider Electric Wonderware Product

A remotely exploitable buffer overflow vulnerability has been identified in one of Schneider Electric’s Wonderware solutions, ICS-CERT reported last week.

A remotely exploitable buffer overflow vulnerability has been identified in one of Schneider Electric’s Wonderware solutions, ICS-CERT reported last week.

The affected solution is Wonderware InTouch Access Anywhere Server, which provides organizations with access to InTouch applications via a Web interface. The product is used all over the world in industries such as chemical, energy, critical manufacturing, water and wastewater systems, and food and agriculture. The Wonderware brand used to be part of Invensys, a company acquired by Schneider Electric in January 2014.

According to the advisory published by ICS-CERT, the buffer overflow vulnerability in Wonderware InTouch Access Anywhere Server could lead to remote code execution.

“An attacker could cause a stack-based buffer overflow by requesting a nonexistent file that may enable the execution of arbitrary code,” the advisory reads.

The vulnerability has been assigned the CVE identifier CVE-2014-9190, and a CVSS v2 score of 10.

Schneider Electric is not aware of any public exploits for the security hole, but ICS-CERT warns that even an attacker with low skill can exploit the flaw.

InTouch Access Anywhere Server 10.6 and InTouch Access Anywhere Server 11.0 are affected by the vulnerability. The vendor has released updates for both versions to address the issue.

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The updates and an advisory from Schneider Electric are available for registered users.

Numerous vulnerabilities have been discovered in Schneider Electric products over the past months, including three bugs in StruxureWare SCADA Expert ClearSCADA products, one issue in the SchneiderWEB human-machine interface (HMI), and several flaws in the ProClima solution.

In addition to the Schneider Electric advisory, ICS-CERT published last week a report for a vulnerability in a library leveraged by many of the HART-based field devices used by industrial control systems (ICS) operators.

Related: Learn More at the 2015 ICS Cyber Security Conference

Written By

Eduard Kovacs (@EduardKovacs) is a contributing editor at SecurityWeek. He worked as a high school IT teacher for two years before starting a career in journalism as Softpedia’s security news reporter. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering.

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