CVE-2020-21359 : Exploit Details and Defense Strategies

An arbitrary file upload vulnerability in the Template Upload function of Maccms10 allows attackers to bypass the suffix whitelist verification and execute arbitrary code by manipulating the uploaded file's name.

Understanding CVE-2020-21359

This CVE describes a critical security issue in Maccms10 that enables malicious actors to upload files with arbitrary code execution capabilities.

What is CVE-2020-21359?

The vulnerability in the Template Upload feature of Maccms10 permits threat actors to evade file type restrictions and inject malicious code by altering the file name.

The Impact of CVE-2020-21359

This vulnerability poses a severe risk as attackers can upload files containing malicious code, potentially leading to unauthorized access, data theft, or system compromise.

Technical Details of CVE-2020-21359

The technical aspects of the vulnerability in Maccms10.

Vulnerability Description

The flaw allows threat actors to upload files with arbitrary code execution capabilities by manipulating the file name during the upload process.

Affected Systems and Versions

Product: Maccms10
Vendor: N/A
Versions: N/A

Exploitation Mechanism

Attackers can exploit this vulnerability by adding a character to the end of the uploaded file's name, bypassing the suffix whitelist verification.

Mitigation and Prevention

Steps to address and prevent the exploitation of CVE-2020-21359.

Immediate Steps to Take

Disable the Template Upload function until a patch is available.
Implement file type verification mechanisms to prevent unauthorized file uploads.
Monitor file uploads for suspicious activity.

Long-Term Security Practices

Regularly update Maccms10 to the latest version to apply security patches.
Conduct security audits to identify and address vulnerabilities proactively.

Patching and Updates

Apply patches provided by Maccms10 promptly to fix the arbitrary file upload vulnerability.