CVE-2021-43556 Explained : Impact and Mitigation

FATEK WinProladder Versions 3.30_24518 and prior are vulnerable to a stack-based buffer overflow, potentially allowing arbitrary code execution.

Understanding CVE-2021-43556

FATEK Automation WinProladder is at risk due to a buffer overflow issue.

What is CVE-2021-43556?

FATEK WinProladder Versions 3.30_24518 and earlier are susceptible to a stack-based buffer overflow during project file processing, enabling attackers to run malicious code.

The Impact of CVE-2021-43556

The vulnerability has a CVSS base score of 7.8 (High severity), with significant impacts on confidentiality, integrity, and availability.

Technical Details of CVE-2021-43556

The technical aspects of the vulnerability.

Vulnerability Description

The vulnerability in FATEK WinProladder versions allows attackers to trigger a stack-based buffer overflow, posing a high risk of arbitrary code execution.

Affected Systems and Versions

Product: WinProladder
Vendor: FATEK Automation
Versions affected: <= 3.30_24518 (All)

Exploitation Mechanism

The vulnerability can be exploited by processing specially crafted project files, leading to a buffer overflow and potential code execution.

Mitigation and Prevention

Ways to mitigate the CVE-2021-43556 vulnerability.

Immediate Steps to Take

Users should promptly contact FATEK Automation customer support for guidance.
Avoid opening project files from untrusted or unknown sources.

Long-Term Security Practices

Regularly update WinProladder to the latest version.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Stay informed about security advisories from FATEK Automation and apply patches promptly.