UniSharp Laravel File Manager Arbitrary File Read Scanner

UniSharp Laravel File Manager is a widely used file management add-on for Laravel, a popular PHP framework. It's used by web developers and organizations to handle file uploads, downloads, and management within Laravel applications efficiently. The software is employed across various industries for managing digital files in web applications. Its integration with Laravel makes it appealing due to its seamless functionality and ease of use. Developers use it to provide end-users with a user-friendly interface to manage files. The file manager supports a range of file operations making it versatile for professionals needing robust file management capabilities.

An Arbitrary File Read vulnerability allows unauthorized users to read files on the server through crafted requests. This vulnerability often impacts applications that do not adequately validate or sanitize file paths. If exploited, an attacker can gain access to sensitive data, like configuration files or passwords, stored on the server. The vulnerability is critical because it can expose server files regardless of their permissions. A successful exploitation could lead to further attacks, including privilege escalation. Compromised systems are at risk of data theft, financial loss, and reputational damage.

The vulnerability in the UniSharp Laravel File Manager stems from its insufficient input validation on file download requests. An attacker could exploit this by constructing a URL path to access files outside of the intended directory. The vulnerable endpoint, typically with the parameters like 'file' and 'working_dir', is susceptible to path traversal attacks, allowing attackers to read files like '/etc/passwd'. The vulnerability requires specific crafted requests to exploit file reading functionalities without authentication. Successful attacks yield sensitive server information, putting the server and its data at high risk. The vulnerability is considered high severity due to its potential impact and relative ease of exploitation.

If exploited, this vulnerability could allow attackers to access sensitive files, leading to the disclosure of confidential information stored on the server. This information could be used for further attacks, such as privilege escalation or unauthorized access to additional server resources. The compromise of sensitive files could lead to severe business impacts including data breaches, financial implications, and loss of customer trust. Furthermore, exposure of critical system files might also aid attackers in identifying new methods to infiltrate the server. Organizations may face legal and regulatory repercussions should sensitive user data be exposed.

REFERENCES

• https://www.exploit-db.com/exploits/48166
• https://github.com/UniSharp/laravel-filemanager