Vulnerability identifier: #VU27663

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: N/A

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Advantech WebAccess
Server applications / SCADA systems

Vendor: Advantech Co., Ltd

Description

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

The vulnerability exists due to a boundary error within the processing of IOCTL 0x520B in datacore.exe. A remote attacker can trick the victim to visit a specially crafted web page, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Advantech WebAccess: 6.0-2007.06.05 - 9.0.0

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External links
http://www.zerodayinitiative.com/advisories/ZDI-20-606/

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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.