Stack-based buffer overflow in PLC WinProladder - CVE-2021-43556
Published: November 18, 2021 / Updated: January 14, 2022
Vulnerability identifier: #VU58239
CSH Severity: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2021-43556
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
PLC WinProladder
PLC WinProladder
Software vendor:
Fatek
Fatek
Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing project files. A remote attacker can trick the victim to open a specially crafted PDW, SPF or TAB file, trigger stack-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.