admidio up to 4.3.9 Message {file_name} unrestricted upload

Summaryinfo

A vulnerability identified as critical has been detected in admidio up to 4.3.9. This affects an unknown part of the file {admidio_base_url}/adm_my_files/messages_attachments/{file_name} of the component Message Module. This manipulation causes unrestricted upload. The identification of this vulnerability is CVE-2024-38529. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in admidio up to 4.3.9 and classified as critical. Affected by this vulnerability is some unknown functionality of the file {admidio_base_url}/adm_my_files/messages_attachments/{file_name} of the component Message Module. The manipulation with an unknown input leads to a unrestricted upload vulnerability. The CWE definition for the vulnerability is CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Admidio is a free, open source user management system for websites of organizations and groups. In Admidio before version 4.3.10, there is a Remote Code Execution Vulnerability in the Message module of the Admidio Application, where it is possible to upload a PHP file in the attachment. The uploaded file can be accessed publicly through the URL `{admidio_base_url}/adm_my_files/messages_attachments/{file_name}`. The vulnerability is caused due to the lack of file extension verification, allowing malicious files to be uploaded to the server and public availability of the uploaded file. This vulnerability is fixed in 4.3.10.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2024-38529 since 06/18/2024. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1608.002 according to MITRE ATT&CK.

Upgrading to version 4.3.10 eliminates this vulnerability. Applying the patch 3b1cc1cda05747edebe15f2825b79bc5a673d94c is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

• admidio

Version

• 4.3.0
• 4.3.1
• 4.3.2
• 4.3.3
• 4.3.4
• 4.3.5
• 4.3.6
• 4.3.7
• 4.3.8
• 4.3.9

License

• open-source

Website

• Product: https://github.com/Admidio/admidio/

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