Advantech WebAccess/SCADA GpsET200 Stack-based Buffer Overflow Remote Code Execution Vulnerability

May 8th, 2020
ZDI-20-622 ZDI-CAN-10086

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

The specific flaw exists within the GpsET200 device driver. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. 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

  • 2020-03-13 - Vulnerability reported to vendor
  • 2020-05-08 - Coordinated public release of advisory

Credit

Z0mb1E

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