Decoded: SMB Cybersecurity

UniSharp Laravel Filemanager Code Injection Vulnerability

Published Date: December 18, 2024

Package Affected Versions Patched Versions Severity
📦 unisharp/laravel-filemanager (Composer) < 2.9.1 2.9.1 High

Description

Summary


A high-severity vulnerability has been identified in the unisharp/laravel-filemanager package. This issue allows attackers to perform Remote Code Execution (RCE) by exploiting a flaw in how file uploads are handled. GitHub reviewed and published details about the vulnerability in the Advisory Database, highlighting the need for users to update to the patched version immediately.

 

Vulnerability Details


The vulnerability affects versions of unisharp/laravel-filemanager prior to 2.9.1. It arises from the package’s handling of file uploads, where attackers can exploit a valid mimetype and append the . character after a PHP file extension. This bypasses file type restrictions, enabling execution of malicious code on the server.

Patches & Workarounds

Steps to Protect Your System



  1. Update Immediately:
    Upgrade to version 2.9.1 or later. Use Composer to ensure you pull the latest secure release:


composer require unisharp/laravel-filemanager:2.9.1


  1. Audit Dependencies:
    Regularly review and update your project’s dependencies to identify vulnerabilities early. Tools like Dependabot can automate this process and notify you about outdated or insecure packages.

  2. Sanitize Inputs:
    Even with updates, always validate and sanitize file uploads rigorously. Ensure mimetype checks and file extension validations are implemented correctly.

  3. Monitor for Alerts:
    Stay informed about vulnerabilities in your project’s dependencies by subscribing to security updates or leveraging tools like GitHub Security Alerts.


 

Why It Matters


If left unpatched, this vulnerability gives attackers a way to execute arbitrary code on your server, potentially leading to data breaches, service disruptions, or complete system compromise. Protecting your systems isn’t just about patching this specific issue—it’s about ensuring your entire stack stays secure and up-to-date.

References

https://nvd.nist.gov/vuln/detail/CVE-2024-21546

https://security.snyk.io/vuln/SNYK-PHP-UNISHARPLARAVELFILEMANAGER-7210316
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