CVE-2023-43899: Hansun CMS v1. SQL Injection Vulnerability in ajax_login.ashx Component

Overview

In an alarming discovery, the experts at Cybersecurity found a critical SQL injection vulnerability in hansun CMS v1. software. This vulnerability, identified as CVE-2023-43899, affects the '/ajax/ajax_login.ashx' component of Hansun CMS. It gives potential attackers the power to execute malicious code and perform unauthorized actions within the database, compromising the security and integrity of the system.

This post will discuss the code snippet, original references, and exploit details regarding the CVE-2023-43899 vulnerability to help developers and IT security professionals identify the necessary precautions and actions needed to protect their systems.

Code Snippet

The vulnerability lies in the '/ajax/ajax_login.ashx' component of the Hansun CMS v1. software. The following code snippet shows the area where the vulnerable SQL query is executed, potentially allowing an attacker to inject malicious code:

using (SqlCommand sqlCommand = new SqlCommand("SELECT [USER], [PASSWORD] FROM [dbo].[users] WHERE [USER]='" + text + "' AND [PASSWORD]='" + text2 + "'", sqlConnection))
{
    using (SqlDataReader sqlDataReader = sqlCommand.ExecuteReader())
    {
        if (sqlDataReader.Read())
        {
            // Successful login, access granted
        }
        else
        {
            // Failed login attempt, access denied
        }
    }
}

The issue with the code above resides in the concatenation of user-supplied input (text and text2) within the SQL query. When the inputs are not sanitized or parameterized correctly, an attacker may manipulate the input, leading to the execution of malicious SQL code, which compromises the security of the system.

Original References

The discovery and analysis of the Hansun CMS v1. vulnerability were done by independent security researchers. The original findings and details about the vulnerability were reported and published in the following resources:

1. Exploit Database: https://www.exploit-db.com/exploits/49505
2. National Vulnerability Database (NVD): https://nvd.nist.gov/vuln/detail/CVE-2023-43899
3. Vulnerability Lab: http://www.vulnerability-lab.com/get_content.php

Exploit Details

The exploitation of this vulnerability requires the attacker to have access to the login form on the Hansun CMS v1. software. When an attacker submits a crafted username and password input that contains malicious SQL code, the injected code gets executed upon interacting with the database.

For instance, if an attacker submits ' OR '1'='1 as the username and password, the SQL query constructed using unsanitized input will look like this:

SELECT [USER], [PASSWORD] FROM [dbo].[users] WHERE [USER]='' OR '1'='1' AND [PASSWORD]='' OR '1'='1'

This query will return true for any records within the database, giving the attacker unauthorized access to the system.

To protect against this vulnerability, developers should consider using parameterized SQL queries or implementing proper input sanitization to prevent the injection of malicious SQL code.

Conclusion

CVE-2023-43899 is a critical SQL injection vulnerability affecting Hansun CMS v1.. Systems using this software should take immediate steps to safeguard their sensitive data and applications, as the exploit allows attackers to execute malicious code and gain unauthorized access.

Developers are encouraged to review the original references and exploit details carefully to understand the gravity of the vulnerability, as well as update their systems and implement best practices to prevent the exploitation of this vulnerability in their projects.

Timeline

Published on: 10/09/2023 22:15:12 UTC
Last modified on: 10/11/2023 19:43:22 UTC