Vulnerability identifier: #VU34105

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-16213

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
WebAccess HMI Designer
Server applications / SCADA systems

Vendor: Advantech Co., Ltd

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing PM3 files. A remote attacker can create a specially crafted project file, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

WebAccess HMI Designer: 2.1.9.31

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External links
http://us-cert.cisa.gov/ics/advisories/icsa-20-219-02
http://www.zerodayinitiative.com/advisories/ZDI-20-956/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.