Vulnerability identifier: #VU21205
Vulnerability risk: High
CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-121
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 in "viewsrv.dll" due to a boundary error when processing an IOCTL 10012 RPC call. A remote unauthenticated attacker can send a specially crafted IOCTL 10012 RPC message to the application, trigger stack-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 updates from vendor's website.
Vulnerable software versions
WebAccess/SCADA: 8.4
External links
http://www.tenable.com/security/research/tra-2019-28
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. However, proof of concept for this vulnerability is available.