Advisory Details

January 13th, 2022

Fatek Automation WinProladder PDW File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability

ZDI-22-033
ZDI-CAN-14634

CVE ID CVE-2021-43554
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 proper validation of user-supplied data, which can result in a write before the start of an allocated buffer. 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://www.cisa.gov/uscert/ics/advisories/icsa-21-320-01
DISCLOSURE TIMELINE
  • 2021-08-04 - Vulnerability reported to vendor
  • 2022-01-13 - Coordinated public release of advisory
CREDIT xina1i
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