#VU57142 Unexpected Sign Extension in PLC WinProladder - CVE-2021-38434
Published: October 8, 2021 / Updated: October 14, 2021
Vulnerability identifier: #VU57142
Vulnerability risk: 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-2021-38434
CWE-ID: CWE-194
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 compromise the target system.
The vulnerability exists due to unexpected sign extension when parsing project files. A remote attacker can trick a victim to open a specially crafted PDW file and execute arbitrary code on the target system.
Remediation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.