Advantech WebAccess/SCADA DATACORE IOCTL 0x0000791e Directory Traversal Remote Code Execution Vulnerability

May 8th, 2020
ZDI-20-591 ZDI-CAN-9996

CVE ID

CVE-2020-12002

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 vulnerable installations of Advantech WebAccess/SCADA. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the implementation of IOCTL 0x0000791e in DATACORE.exe. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. 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

  • 2019-12-26 - Vulnerability reported to vendor
  • 2020-05-08 - Coordinated public release of advisory

Credit

Z0mb1E

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