Executive Summary

This vulnerability exists in the CodeAstro Payroll System 1.0, specifically in an unknown function within the file /home_salary.php. It involves the manipulation of the argument rate or salary_rate, which leads to a SQL injection vulnerability. This means that an attacker can inject malicious SQL code through this argument.

The attack can be carried out remotely, allowing an attacker to exploit the system without physical access. The exploit has been publicly disclosed, which means it is known and potentially usable by attackers.

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Impact Analysis

The SQL injection vulnerability can allow an attacker to manipulate the database queries executed by the payroll system. This can lead to unauthorized access to sensitive payroll data, data modification, or deletion.

Because the attack can be performed remotely, it increases the risk of data breaches, potentially exposing employee salary information or other confidential data.

The CVSS v3.1 score of 6.3 indicates a medium severity impact, with potential consequences including limited confidentiality, integrity, and availability impacts.

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Compliance Impact

The SQL injection vulnerability in CodeAstro Payroll System 1.0 allows unauthorized access to sensitive data, data tampering, and potential system compromise. Such unauthorized access and data leakage can lead to violations of data protection regulations like GDPR and HIPAA, which require the protection of personal and sensitive information.

Failure to properly secure the payroll system against this vulnerability could result in non-compliance with these standards due to exposure of personal employee data, potentially leading to legal and financial consequences.

Mitigation measures such as prepared statements, strict input validation, minimizing database user permissions, and regular security audits are essential to maintain compliance with these regulations.

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Detection Guidance

This vulnerability can be detected by testing the affected parameter for SQL injection flaws, specifically the 'rate' or 'salary_rate' parameter in the /home_salary.php file of the Payroll System V1.0.

A common method is to use time-based blind SQL injection payloads to confirm the vulnerability by observing response delays caused by injected SQL commands.

For example, you can use curl or similar tools to send crafted requests that include SQL injection payloads to the vulnerable parameter and monitor the response times.

• curl "http://target/PayrollSy-PHP/home_salary.php?rate=1' AND IF(SLEEP(5),1,0)-- -"
• Use automated SQL injection detection tools like sqlmap targeting the parameter 'rate' or 'salary_rate' in the URL.

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Mitigation Strategies

Immediate mitigation steps include:

• Implement prepared statements with parameter binding to prevent SQL injection.
• Apply strict input validation on the 'rate' or 'salary_rate' parameters to ensure only expected data is processed.
• Minimize database user permissions to limit the impact of a potential exploit.
• Conduct regular security audits and code reviews to identify and fix similar vulnerabilities.

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