CVE-2021-41566 Explained : Impact and Mitigation

Tad TadTools - Arbitrary File Upload vulnerability allows remote attackers to upload any types of files and execute arbitrary code without authentication.

Understanding CVE-2021-41566

CVE-2021-41566 is a critical vulnerability in TadTools that enables attackers to upload malicious files and execute arbitrary code.

What is CVE-2021-41566?

The vulnerability arises from a lack of proper file extension filtering in the TadTools file upload function, allowing unauthorized users to upload and execute files.

The Impact of CVE-2021-41566

CVSS Base Score: 9.8 (Critical)
Attack Vector: Network
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
Attack Complexity: Low
Malicious actors can exploit this flaw to compromise the system's confidentiality, integrity, and availability.

Technical Details of CVE-2021-41566

This section delves into the specific aspects of the vulnerability.

Vulnerability Description

The TadTools file upload function does not adequately filter file extensions, enabling remote attackers to upload any file type and execute malicious code.

Affected Systems and Versions

Affected Product: TadTools by Tad
Vulnerable Versions: 3.2.1 and below
Version Type: Custom (Version 0)

Exploitation Mechanism

Attackers can exploit this vulnerability by uploading specially crafted files through the file upload function, bypassing authentication mechanisms.

Mitigation and Prevention

It is crucial to take immediate action to remediate this vulnerability.

Immediate Steps to Take

Update: Upgrade TadTools to version 3.2.2 to patch the security flaw.

Long-Term Security Practices

Implement strict file upload validation procedures.
Regularly monitor and audit file upload activities.
Conduct security training to enhance awareness of secure coding practices.

Patching and Updates

Regularly check for vendor security updates and apply patches promptly.