Recently, a critical vulnerability has been discovered in the SourceCodester Simple Membership System 1.. This vulnerability has been classified as critical and has been assigned the identifier VDB-239253. The unknown part of the file, club_edit_query.php, is affected by this vulnerability, and the manipulation of the argument club_id could lead to a SQL injection. This attack can be initiated remotely, and the exploit has been disclosed to the public, which means it may be used by malicious actors.

Detailed Information

This vulnerability is caused by the improper sanitization of the user input in the club_id parameter. This allows an attacker to inject arbitrary SQL code into the system through the club_id parameter. This SQL injection can then be used to manipulate the database, potentially leading to unauthorized access, data leakage, or data manipulation.

The vulnerability has been identified in the following code snippet

// club_edit_query.php

$club_id = $_POST['club_id'];
$sql = "UPDATE clubs SET ...
$res = $conn->query($sql);

As shown in the code snippet, the club_id parameter value is directly taken from the user input ($_POST['club_id']) without properly validating or sanitizing it. This enables the attacker to manipulate the SQL query by providing malicious input for the club_id parameter.

Exploit Details

To exploit this vulnerability, an attacker must have access to the system that is running the vulnerable version of SourceCodester Simple Membership System 1.. They need to send specially crafted requests with malicious SQL payloads through the club_id parameter.

For example, the attacker may submit the following input for the club_id parameter

' or 1=1 --

This input can then manipulate the SQL query and allow the attacker to bypass the intended condition in the 'WHERE' clause by making the condition always true (1=1). This can lead to unauthorized access to records in the database or even the extraction of sensitive data.

Mitigation Measures

To mitigate this vulnerability, users of SourceCodester Simple Membership System 1. are recommended to apply available patches or updates as soon as they are released. Additionally, the developers should implement proper input validation and sanitization techniques to prevent SQL injection attacks.

As a temporary workaround, users can manually alter the vulnerable code to sanitize the club_id input before processing the SQL query, like in the following example:

// club_edit_query.php

$club_id = filter_input(INPUT_POST, 'club_id', FILTER_SANITIZE_NUMBER_INT);
$sql = "UPDATE clubs SET ...
$res = $conn->query($sql);

This modification utilizes the filter_input() function to sanitize the club_id value before using it in the SQL query, making it harder for attackers to exploit the vulnerability.

Original References

1. Vulnerability Disclosure: https://www.example.com/disclosure.html
2. SourceCodester Simple Membership System: https://www.sourcecodester.com/php/1442/simple-membership-system.html

Conclusion

CVE-2023-4844 is a critical vulnerability that affects the SourceCodester Simple Membership System 1., with potential consequences of unauthorized access, data leakage, and data manipulation. To prevent this, users should apply patches and updates as soon as they become available, with developers working to ensure proper input validation and sanitization techniques are implemented.

Timeline

Published on: 09/08/2023 22:15:12 UTC
Last modified on: 11/07/2023 04:23:01 UTC