CVE-2022-26605

Vulnerability

An authenticated arbitrary file upload vulnerability exists in eZiosuite v2.0.7 within the avatar upload functionality. The application does not properly validate the file type or restrict the upload path, allowing an authenticated attacker to upload arbitrary files to the server. This vulnerability is triggered when a user with valid credentials accesses the avatar upload feature [1].

Exploitation

To exploit this vulnerability, an attacker must have a valid login session. The attacker can then upload a malicious file (e.g., a PHP web shell) by sending a crafted HTTP request to the avatar upload endpoint. The reference [1] describes modifying the returned path or manipulating parameters to obtain a key that controls the file storage location, enabling arbitrary file download or upload. However, the core issue is the lack of file type validation during upload.

Impact

Successful exploitation allows the attacker to upload arbitrary files, including executable scripts, leading to remote code execution on the server. The attacker gains the ability to execute commands with the privileges of the web server, which can result in full compromise of the application and underlying system. The impact is limited to authenticated users, but any authenticated role can leverage this vulnerability [1].

Mitigation

As of the publication date of this CVE (2022-04-06), no official patch or mitigation has been disclosed for eZiosuite v2.0.7. The vendor has not released a fixed version. Until a patch is available, administrators should restrict access to the avatar upload feature, implement file type validation on the server side, and monitor for suspicious file uploads. Users are advised to contact the vendor for updates or consider disabling the upload feature if possible [1].