MySQL LOAD_FILE Detection Scanner

MySQL is a widely-used open-source relational database management system, typically used to manage and store structured data for various applications. It is employed in environments ranging from web applications to complex data warehouses, offering robust support for data management, scalability, and data integrity. Due to its versatility and support for structured queries, MySQL is popular in e-commerce platforms, social networks, and content management systems. Admins and developers use it for managing customer information, processing transactions, and organizing digital content. MySQL's powerful functions allow for a high degree of flexibility and customization in managing data across different types of environments. It can be integrated with various applications and frameworks, including those built with PHP, Python, and Java.

The MySQL LOAD_FILE function, if improperly secured, can lead to security vulnerabilities by allowing unauthorized file access. LOAD_FILE is intended to read server-side file contents, which, if unrestricted, may reveal sensitive files to attackers. When exposed, this function can be exploited to gain unauthorized access to critical server files. Detection of LOAD_FILE usage is essential to identify potential misconfigurations or access control weaknesses. An exposed LOAD_FILE function may allow attackers to view server files, increasing the risk of data theft and system compromise. Detecting this vulnerability is critical for environments where sensitive data or configurations are stored in local server files.

Technical details of the vulnerability involve the usage of the LOAD_FILE function in SQL queries, allowing file access based on the provided file path. This scanner tests the function by attempting to retrieve the contents of a known file, such as '/etc/passwd'. If successful, the scanner verifies that LOAD_FILE is enabled and accessible without restriction, confirming the vulnerability's presence. The detection process employs different username and password combinations to gain access and execute the function, simulating potential attacker actions. By testing various credentials, the scanner can detect whether an attacker could exploit the vulnerability under common access scenarios.

If exploited, the LOAD_FILE vulnerability can lead to unauthorized access to server files, potentially exposing sensitive data like configuration files, user information, or encrypted passwords. Attackers with access to these files may use the information to escalate their privileges or launch further attacks on the server. The exposure of files such as '/etc/passwd' can provide insight into system user accounts, enabling attackers to better strategize their exploitation techniques. In severe cases, attackers could read files containing cryptographic keys or credentials, compromising system integrity and confidentiality. Misconfigured file access can have serious repercussions on data privacy and security.

REFERENCES

• https://nmap.org/nsedoc/scripts/mysql-databases.html