CVE-2024-0492: Kashipara Billing Software SQLi Flaw

CVE-2024-0492 Overview

A critical SQL injection vulnerability has been identified in Kashipara Billing Software version 1.0. The vulnerability exists in the buyer_detail_submit.php file within the HTTP POST Request Handler component. Attackers can exploit this flaw by manipulating the gstn_no parameter, enabling unauthorized SQL query execution against the backend database. This vulnerability can be exploited remotely without authentication, potentially allowing attackers to access, modify, or delete sensitive billing and customer data.

Critical Impact

Remote attackers can execute arbitrary SQL commands without authentication, potentially compromising the entire database containing sensitive billing and customer information.

Affected Products

• Kashipara Billing Software version 1.0

Discovery Timeline

• January 13, 2024 - CVE-2024-0492 published to NVD
• November 21, 2024 - Last updated in NVD database

Technical Details for CVE-2024-0492

Vulnerability Analysis

This SQL injection vulnerability (CWE-89) exists in the buyer_detail_submit.php file of Kashipara Billing Software 1.0. The vulnerability is triggered through the HTTP POST Request Handler when processing the gstn_no parameter. Due to improper input validation and sanitization, user-supplied input is directly incorporated into SQL queries without proper escaping or parameterization.

The vulnerability allows unauthenticated remote attackers to inject malicious SQL statements through the gstn_no field. Successful exploitation could result in unauthorized access to the database, data exfiltration, data manipulation, or complete database compromise. The network-accessible nature of this vulnerability combined with the lack of authentication requirements significantly increases the risk profile.

Root Cause

The root cause of this vulnerability is improper input validation in the buyer_detail_submit.php file. The gstn_no parameter accepts user input that is directly concatenated into SQL queries without proper sanitization, parameterization, or use of prepared statements. This is a classic example of CWE-89 (Improper Neutralization of Special Elements used in an SQL Command).

Attack Vector

The attack can be executed remotely via HTTP POST requests to the buyer_detail_submit.php endpoint. An attacker crafts a malicious payload containing SQL syntax within the gstn_no parameter. When the application processes this request, the injected SQL code is executed against the database with the same privileges as the application's database user.

The vulnerability allows attackers to bypass authentication mechanisms, extract sensitive data from the database, modify or delete records, and potentially gain access to the underlying operating system depending on database configuration and privileges. Technical details regarding the exploitation method are documented in the GitHub SQL Injection Exploit report.

Detection Methods for CVE-2024-0492

Indicators of Compromise

• Unusual or malformed HTTP POST requests to buyer_detail_submit.php containing SQL syntax characters such as single quotes, semicolons, or SQL keywords
• Database error messages in application logs indicating SQL syntax errors from the gstn_no parameter
• Unexpected database queries or access patterns in database audit logs
• Unusual data extraction or modification activities in billing records

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns in POST requests to buyer_detail_submit.php
• Enable detailed logging on the web server to capture all POST requests with their parameters for forensic analysis
• Configure database auditing to detect unusual query patterns, failed authentication attempts, or privilege escalation attempts
• Deploy intrusion detection systems (IDS) with signatures for SQL injection attack patterns

Monitoring Recommendations

• Monitor web server access logs for requests to buyer_detail_submit.php with suspicious parameter values
• Set up alerts for database errors related to SQL syntax violations
• Implement real-time monitoring of database query patterns to identify anomalous SQL statements
• Review application logs regularly for signs of exploitation attempts or successful compromises

How to Mitigate CVE-2024-0492

Immediate Actions Required

• Restrict network access to the Kashipara Billing Software application to trusted IP addresses only
• Implement input validation and sanitization for the gstn_no parameter as a temporary fix
• Deploy a Web Application Firewall (WAF) with SQL injection protection rules in front of the application
• Review database user privileges and apply the principle of least privilege

Patch Information

As of the last update, no official vendor patch has been released for this vulnerability. Organizations using Kashipara Billing Software 1.0 should contact the vendor directly for patch availability information. Monitor the VulDB entry for updates on remediation options.

Workarounds

• Implement prepared statements or parameterized queries in the buyer_detail_submit.php file to prevent SQL injection
• Apply strict input validation on the gstn_no parameter to only accept expected GSTN format values
• Restrict database user privileges used by the application to minimum required operations
• Consider taking the affected functionality offline until a proper fix can be implemented
• Use network segmentation to isolate the billing software from critical infrastructure

# Example: Restrict access to the vulnerable endpoint using Apache .htaccess
<Files "buyer_detail_submit.php">
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
</Files>