#VU18985 Out-of-bounds write in WebAccess/SCADA - CVE-2019-10987

Vulnerability identifier: #VU18985

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2019-10987

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
WebAccess/SCADA
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 when processing data passed to the webvrpcs process, within the 0x2723 IOCTL. A remote attacker can send a specially crafted file to the affected application, trigger out-of-bounds write error and execute arbitrary code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

WebAccess/SCADA: 7.2 - 8.3.5

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External links
https://www.us-cert.gov/ics/advisories/icsa-19-178-05
https://www.zerodayinitiative.com/advisories/ZDI-19-587/

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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.