Lost and Found Information System v1.0 - SQL Injection

SQL Injection in Lost and Found Information System v1.0: A Deep Dive into CVE-2023-33592

SQL Injection remains one of the most prevalent and dangerous vulnerabilities in web applications, particularly in systems that rely on user input to query databases. The Lost and Found Information System v1.0 (LFIS), a widely used platform for managing lost items and contact information, has recently been identified as vulnerable to SQL injection due to improper input sanitization. This vulnerability, assigned CVE-2023-33592, was discovered by cybersecurity researcher Amirhossein Bahramizadeh in June 2023 and affects installations across Iran and other regions using the system.

Exploitation Vector: The Contact Information Page

The vulnerability manifests specifically in the admin/?page=system_info/contact_information endpoint. This page is designed to display administrative contact details, but it fails to validate or escape user-supplied input. Attackers can exploit this flaw by injecting malicious SQL code directly into the query parameters.

For example, the attacker sends a request with a modified URL parameter:

http://example.com/php-lfis/admin/?page=system_info/contact_information&search=' OR 1=1 --

This payload leverages a classic SQL injection technique: the single quote (') terminates the existing query string, while OR 1=1 forces the condition to always evaluate as true. The -- comment symbol disables the rest of the query, preventing syntax errors. When executed, this query returns all records from the database, potentially exposing sensitive data such as admin credentials, user emails, and system configurations.

Real-World Impact and Attack Scenario

Imagine a scenario where a malicious actor targets a university’s LFIS system. By accessing the contact_information page and injecting the payload, they can retrieve a list of all registered users—including staff and students—along with their contact details. This data can be used for phishing campaigns, credential harvesting, or even social engineering attacks.

Moreover, if the database contains stored passwords in plaintext or weakly hashed formats, attackers could extract them directly, leading to full system compromise. In some cases, the injected query may also trigger error messages revealing database structure, which further aids in crafting more advanced attacks.

Technical Analysis of the Vulnerable Code

Examining the underlying code reveals a lack of prepared statements or parameterized queries. Instead, the application concatenates user input directly into SQL strings:

$query = "SELECT * FROM contacts WHERE name = '" . $_GET['search'] . "'";
$result = mysqli_query($connection, $query);

This approach is inherently unsafe. Without proper escaping or validation, any input containing SQL syntax (e.g., ' OR 1=1 --) becomes part of the executed query. This is a textbook example of injection—where user data is treated as executable code.

Security Best Practices and Fixes

To prevent such vulnerabilities, developers must adopt secure coding practices:

• Use Parameterized Queries: Replace string concatenation with prepared statements using mysqli_prepare() or PDO.
• Input Validation: Sanitize and validate all user inputs using whitelisting or regex patterns.
• Output Escaping: Ensure that any data returned to users is properly escaped to prevent XSS.
• Role-Based Access Control: Restrict access to sensitive pages to authenticated administrators only.

Here’s a corrected version of the vulnerable code using PDO:

$pdo = new PDO("mysql:host=localhost;dbname=lfis", $username, $password);
$stmt = $pdo->prepare("SELECT * FROM contacts WHERE name = ?");
$stmt->execute([$_GET['search']]);
$result = $stmt->fetchAll();

This version prevents SQL injection by separating data from code. The query structure remains fixed, and user input is treated as a parameter, not as part of the SQL syntax.

Remediation and Patching Recommendations

System administrators should:

• Immediately update the LFIS v1.0 system to a patched version (if available).
• Implement a Web Application Firewall (WAF) to detect and block SQL injection attempts.
• Conduct regular penetration testing and vulnerability scanning using tools like OWASP ZAP or Burp Suite.
• Log and monitor all requests to sensitive endpoints for anomalies.

Organizations using LFIS should also consider migrating to more secure, actively maintained alternatives with built-in security features.

Conclusion

The CVE-2023-33592 vulnerability in Lost and Found Information System v1.0 underscores the critical importance of secure coding practices in web development. Even seemingly benign components—like a contact information page—can become entry points for attackers if not properly secured. By understanding the mechanics of SQL injection, adopting best practices, and applying timely patches, organizations can significantly reduce their exposure to such threats.