CVE-2024-9818: Veterinary Appointment System SQLi Flaw

CVE-2024-9818 Overview

A critical SQL injection vulnerability has been identified in SourceCodester Online Veterinary Appointment System version 1.0. The vulnerability exists in the /admin/categories/manage_category.php file, where the id parameter is improperly handled, allowing attackers to inject malicious SQL queries. This flaw can be exploited remotely without authentication, potentially compromising the confidentiality, integrity, and availability of the underlying database.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to extract sensitive data, modify database records, or potentially compromise the entire veterinary appointment system database.

Affected Products

• SourceCodester Online Veterinary Appointment System 1.0
• oretnom23 online_veterinary_appointment_system

Discovery Timeline

• 2024-10-10 - CVE-2024-9818 published to NVD
• 2024-10-17 - Last updated in NVD database

Technical Details for CVE-2024-9818

Vulnerability Analysis

This SQL injection vulnerability arises from inadequate input validation in the category management functionality of the Online Veterinary Appointment System. The id parameter in the manage_category.php file is directly incorporated into SQL queries without proper sanitization or parameterization. This allows attackers to craft malicious input that alters the intended SQL query logic, enabling unauthorized database operations.

The vulnerability can be exploited remotely through the network, requiring no authentication or user interaction. Successful exploitation could allow attackers to read sensitive information from the database, including user credentials, appointment details, and other confidential veterinary records. Additionally, attackers may be able to modify or delete database entries, potentially disrupting the veterinary practice's operations.

Root Cause

The root cause of CVE-2024-9818 is CWE-89: Improper Neutralization of Special Elements used in an SQL Command (SQL Injection). The application fails to properly validate, sanitize, or parameterize user-supplied input in the id parameter before incorporating it into SQL queries. This fundamental security oversight allows special characters and SQL syntax to be interpreted as executable commands rather than data.

Attack Vector

The attack vector is network-based, allowing remote exploitation without requiring prior authentication. An attacker can target the /admin/categories/manage_category.php endpoint by manipulating the id parameter with crafted SQL payloads. The low attack complexity and absence of required privileges or user interaction make this vulnerability particularly accessible to malicious actors.

The vulnerability manifests when user input in the id parameter is passed directly to database queries without sanitization. Attackers can inject SQL statements through this parameter to bypass authentication, extract data, or manipulate the database. Technical details and proof-of-concept information are available in the GitHub SQLi Vulnerability Report.

Detection Methods for CVE-2024-9818

Indicators of Compromise

• Unusual SQL error messages in application logs or web responses from the manage_category.php endpoint
• Anomalous database queries containing SQL injection syntax such as UNION SELECT, OR 1=1, or comment sequences (--, /**/)
• Unexpected access patterns to the /admin/categories/manage_category.php file with suspicious id parameter values
• Database audit logs showing unauthorized data access or extraction attempts

Detection Strategies

• Deploy Web Application Firewalls (WAF) with SQL injection detection rules targeting the affected endpoint
• Implement application-level logging to capture all requests to /admin/categories/manage_category.php with parameter details
• Configure database query monitoring to alert on malformed or suspicious SQL statements
• Utilize intrusion detection systems (IDS) with signatures for common SQL injection patterns

Monitoring Recommendations

• Enable verbose logging on the web server to capture full request details including query parameters
• Monitor database connection pools for unusual activity or connection exhaustion that may indicate exploitation attempts
• Set up real-time alerting for SQL syntax errors in application logs
• Review access logs for repeated requests to the vulnerable endpoint with varying id parameter values

How to Mitigate CVE-2024-9818

Immediate Actions Required

• Restrict access to the /admin/categories/manage_category.php endpoint using IP whitelisting or additional authentication controls
• Deploy a Web Application Firewall (WAF) with SQL injection protection rules
• If possible, take the vulnerable application offline until a patch is available or custom remediation is implemented
• Review and audit database access logs for signs of prior exploitation

Patch Information

No official vendor patch has been identified for this vulnerability. Users of the SourceCodester Online Veterinary Appointment System should contact the developer (oretnom23) for updates or consider implementing custom code fixes. Additional vulnerability details are available through VulDB #279972.

Workarounds

• Implement prepared statements (parameterized queries) for all database interactions involving the id parameter
• Apply strict input validation to ensure the id parameter only accepts expected numeric values
• Deploy a WAF rule to block requests containing SQL injection patterns to the affected endpoint
• Restrict administrative access to trusted IP addresses only

# Example Apache configuration to restrict access to admin directory
<Directory "/var/www/html/admin">
    # Restrict access to specific IP addresses
    Require ip 192.168.1.0/24
    Require ip 10.0.0.0/8
    # Enable additional logging for the admin directory
    CustomLog /var/log/apache2/admin_access.log combined
</Directory>