Compliance Impact

The vulnerability allows authenticated attackers to execute arbitrary PHP code on the server by uploading malicious files, which can lead to unauthorized access and control over the system.

Such unauthorized access and potential data breaches can compromise the confidentiality, integrity, and availability of sensitive data, which are critical requirements under common standards and regulations like GDPR and HIPAA.

Therefore, exploitation of this vulnerability could result in non-compliance with these regulations due to failure to adequately protect personal or health-related data.

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Executive Summary

Aero CMS version 0.0.1 contains a PHP code injection vulnerability (CVE-2022-50944) that allows authenticated attackers to execute arbitrary PHP code on the server.

Attackers exploit this flaw by uploading malicious PHP files through the image parameter in the admin posts.php endpoint with the source=add_post parameter.

Once these malicious PHP files are uploaded, the server executes them, which can lead to attackers gaining control over the system.

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Impact Analysis

This vulnerability can have a significant impact as it allows attackers with authentication to execute arbitrary PHP code on the server.

Successful exploitation can lead to full system compromise, unauthorized access, data theft, or disruption of services.

Given the high CVSS score of 8.7, the risk posed by this vulnerability is considerable.

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Detection Guidance

This vulnerability can be detected by monitoring for suspicious file uploads to the admin posts.php endpoint, specifically those using the source=add_post parameter with the image parameter containing PHP code.

You can check your web server logs for POST requests to posts.php with source=add_post and inspect the uploaded files for PHP code embedded in the image parameter.

A possible command to detect such uploads on a Linux server might be:

• grep -i 'posts.php' /var/log/apache2/access.log | grep 'source=add_post'

Additionally, you can search for suspicious PHP files in the upload directories with commands like:

• find /path/to/uploads -name '*.php' -exec grep -l '<?php' {} +

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Mitigation Strategies

Immediate mitigation steps include restricting authenticated users' ability to upload files through the image parameter in the admin posts.php endpoint.

You should implement strict validation and sanitization of uploaded files to ensure that only allowed image types are accepted and that no PHP code can be uploaded.

Additionally, consider disabling the execution of PHP files in the upload directories by configuring your web server to prevent execution of scripts in those locations.

If possible, update Aero CMS to a version that patches this vulnerability or apply any available security patches.

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