openSIS Local File Inclusion (LFI) Scanner

openSIS is a widely used open-source student information system designed for schools and educational institutions to manage student data, attendance, grades, and more. It is primarily used by educational institutions to streamline administrative processes and improve communication between teachers, students, and parents. The software is utilized worldwide, providing an affordable solution for managing school operations efficiently. Whether employed in small private schools or large public school districts, openSIS aids in maintaining accurate and organized student information. Its user-friendly interface makes it accessible to administrators, faculty, and parents, enhancing overall educational management. Through its comprehensive modules, openSIS supports the educational community in optimizing educational workflows.

A Local File Inclusion (LFI) vulnerability allows attackers to include files on a server through the web browser. In the context of openSIS, this vulnerability enables unauthorized access to sensitive files, escalating the potential risk to data confidentiality. This is particularly concerning for educational institutions that manage a wealth of personal student information. LFI vulnerabilities can be exploited by attackers to execute arbitrary code or disclose sensitive files like configuration files, leading to a possible full system compromise. The ease of exploitability makes LFI a significant threat, particularly when the attacker does not require authentication to execute the attack. Detecting and mitigating such vulnerabilities is crucial to maintaining the integrity and security of educational institutions' digital infrastructure.

The vulnerability in openSIS 5.1 lies within a specific endpoint that allows unauthorized users to include local files. The vulnerable parameter, identified in the 'ajax.php' script, fails to properly sanitize user input. This lack of input validation permits attackers to manipulate the file path and access unauthorized directories and files. By exploiting this weakness, an attacker can navigate the directory structure and retrieve sensitive system files, such as 'etc/passwd'. Moreover, if exploited further, this flaw could allow the execution of arbitrary local scripts, making it a severe security risk. Identifying such weaknesses can help administrators apply necessary patches to ensure their systems are protected against potential breaches.

If the vulnerability is exploited, attackers could gain unauthorized access to critical files on the server, including system configurations and user databases. This breach of confidentiality could result in a compromise of sensitive educational data, such as student records, administrative credentials, and more. Additionally, this vulnerability could lead to privilege escalation within the system, posing a risk to the overall network security of the affected institution. The unauthorized execution of local scripts might also be possible, enabling further exploitation of the system's vulnerabilities. To safeguard against such attacks, it is essential that affected systems are promptly patched and any unauthorized access attempts are thoroughly investigated.

REFERENCES

• https://www.exploit-db.com/exploits/38039