Fatek Automation WinProladder PDW File Parsing Use-After-Free Remote Code Execution Vulnerability

October 14th, 2021
ZDI-21-1170 ZDI-CAN-13743

CVE ID

CVE-2021-38438

CVSS Score

7.8 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors

Fatek Automation

Affected Products

WinProladder

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Fatek Automation WinProladder. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of PDW files. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process.

Additional Details

Fatek Automation has issued an update to correct this vulnerability. More details can be found at:
https://us-cert.cisa.gov/ics/advisories/icsa-21-280-06

Disclosure Timeline

  • 2021-05-13 - Vulnerability reported to vendor
  • 2021-10-14 - Coordinated public release of advisory

Credit

xina1i

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