CVE-2019-12548 : Security Advisory and Response

Bludit before version 3.9.0 allows an authenticated user to execute remote code by uploading a PHP file while changing the logo through /admin/ajax/upload-logo.

Understanding CVE-2019-12548

In May 2019, CVE-2019-12548 was published, highlighting a vulnerability in Bludit versions prior to 3.9.0 that could lead to remote code execution.

What is CVE-2019-12548?

Bludit versions before 3.9.0 allow authenticated users to upload a PHP file to execute remote code when modifying the logo using the endpoint /admin/ajax/upload-logo.

The Impact of CVE-2019-12548

This vulnerability enables attackers to execute malicious PHP code remotely, potentially leading to unauthorized access, data breaches, and system compromise.

Technical Details of CVE-2019-12548

Bludit before version 3.9.0 is susceptible to remote code execution due to improper validation of uploaded files.

Vulnerability Description

An authenticated user can exploit this flaw by uploading a PHP file while changing the logo through the /admin/ajax/upload-logo endpoint.

Affected Systems and Versions

Product: Bludit
Vendor: N/A
Versions Affected: All versions before 3.9.0

Exploitation Mechanism

Attackers can upload a malicious PHP file during the logo modification process, allowing them to execute arbitrary code on the server.

Mitigation and Prevention

To address CVE-2019-12548 and enhance security:

Immediate Steps to Take

Upgrade Bludit to version 3.9.0 or later.
Restrict access to the /admin/ajax/upload-logo endpoint.
Monitor file uploads for suspicious activity.

Long-Term Security Practices

Implement regular security training for users on safe file handling practices.
Conduct security audits to identify and remediate vulnerabilities.

Patching and Updates

Stay informed about security updates and patches released by Bludit.