Advisory Details

May 8th, 2020

Advantech WebAccess/SCADA ViewSrv IOCTL 0x00002711 Command Injection Remote Code Execution Vulnerability

ZDI-20-595
ZDI-CAN-9905

CVE ID CVE-2020-12006
CVSS SCORE 9.8, (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
AFFECTED VENDORS Advantech
AFFECTED PRODUCTS WebAccess/SCADA
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Advantech WebAccess/SCADA. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the implementation of IOCTL 0x00002711 in ViewSrv.dll. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of Administrator.

ADDITIONAL DETAILS Advantech has issued an update to correct this vulnerability. More details can be found at:
https://www.us-cert.gov/ics/advisories/icsa-20-128-36
DISCLOSURE TIMELINE
  • 2020-01-10 - Vulnerability reported to vendor
  • 2020-05-08 - Coordinated public release of advisory
CREDIT Z0mb1E
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