Unrestricted File Upload in Pizzafy Ecommerce System

Executive Summary

This vulnerability exists in the SourceCodester Pizzafy Ecommerce System 1.0, specifically in the save_menu function of the /admin/admin_class_novo.php file within the File Extension Handler component.

It allows an attacker to manipulate the 'img' argument to perform an unrestricted file upload.

The attack can be carried out remotely, and an exploit for this vulnerability has been made public.

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Detection Guidance

This vulnerability can be detected by checking for the presence of unauthorized or suspicious files in the web-accessible assets/img/ directory, especially PHP files disguised as images.

You can also monitor for unusual HTTP requests that attempt to execute commands via the cmd parameter in URLs targeting uploaded files.

Suggested commands to detect potential exploitation include:

• List files in the assets/img/ directory to find unexpected PHP files: ls -la /path/to/assets/img/
• Search for PHP files in the image directory: find /path/to/assets/img/ -type f -name "*.php"
• Check web server access logs for requests containing the cmd parameter: grep "cmd=" /var/log/apache2/access.log
• Use network monitoring tools to detect suspicious HTTP requests targeting the upload endpoint or uploaded files.

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Impact Analysis

The vulnerability allows an attacker to upload files without restriction, which could lead to unauthorized files being placed on the server.

This could potentially be exploited to execute malicious code, compromise the server, or disrupt the ecommerce system's normal operation.

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Compliance Impact

The vulnerability allows an attacker with administrator privileges to upload malicious files and execute arbitrary commands on the server, potentially leading to full system compromise.

Such a compromise can result in unauthorized access to sensitive data, including database credentials and other protected information.

This exposure and potential data breach could violate common standards and regulations like GDPR and HIPAA, which require protection of personal and sensitive data against unauthorized access and breaches.

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Mitigation Strategies

Immediate mitigation steps include restricting file uploads to only allow safe file types and validating file extensions and MIME types in the save_menu() function.

Disable directory listing on the assets/img/ directory to prevent attackers from easily locating uploaded files.

Remove any suspicious or unauthorized files found in the assets/img/ directory, especially PHP files.

Apply proper access controls to the upload functionality to ensure only trusted administrators can upload files.

Monitor server logs for signs of exploitation attempts and consider temporarily disabling the vulnerable upload feature until a patch is applied.

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