Vulnerability identifier: #VU11260

Vulnerability risk: Low

CVSSv3.1: 7.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-7502

CWE-ID: CWE-822

Exploitation vector: Local

Exploit availability: Yes

Vulnerable software:
TwinCAT
Client/Desktop applications / Software for system administration

Vendor: Beckhoff

Description
The vulnerability allows a local attacker to execute arbitrary code on the target system.

The weakness exists due to improper validation of user-supplied pointer values. A local attacker can execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation
Update TwinCAT 3.1 Build 4022 to version 4022.14, TwinCAT 2.11 R3 to version 2300 and recompile TwinCAT 3.1 C++/Matlab modules after update.

Vulnerable software versions

TwinCAT: 2.11 R3 2259 - 3.1 Matlab TC1320

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External links
http://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2018-001.pdf

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.