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Beckhoff has an update to mitigate an untrusted pointer dereference in its TwinCAT product, according to a report with ICS-CERT.

Successful exploitation of this vulnerability, discovered by Steven Seeley of Source Incite, could allow local attackers to escalate privileges.

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The vulnerability affects the following TwinCAT PLC products:
• TwinCAT 3.1 Build 4022.4 or prior
• TwinCAT 2.11 R3 2259 or prior
• TwinCAT 3.1 C++ / Matlab (TC1210/TC1220/TC1300/TC1320)

No known public exploits specifically target this vulnerability. This vulnerability is not exploitable remotely. However, an attacker with low skill level could leverage the vulnerability.

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In the vulnerability, several kernel drivers lack proper validation of user-supplied pointer values. An attacker who is able to execute code on the target may be able to exploit this vulnerability to obtain SYSTEM privileges.

CVE-2018-7502 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 7.8.

The product sees use in the critical manufacturing, energy, and water and wastewater systems sectors. It also sees action on a global basis.

Beckhoff recommends users update to the newest version and recompile Matlab modules after updating.

Click here to see Beckhoff Security Advisory 2018-001.

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