CVE-2019-13375 in Central WiFi Manager CWM(100)
Summary
by MITRE
A SQL Injection was discovered in D-Link Central WiFi Manager CWM(100) before v1.03R0100_BETA6 in PayAction.class.php with the index.php/Pay/passcodeAuth parameter passcode. The vulnerability does not need any authentication.
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Analysis
by VulDB Data Team • 10/18/2023
The vulnerability identified as CVE-2019-13375 represents a critical SQL injection flaw within the D-Link Central WiFi Manager CWM(100) system, specifically affecting versions prior to v1.03R0100_BETA6. This security weakness resides in the PayAction.class.php file and manifests through the index.php/Pay/passcodeAuth parameter, which processes the passcode input. The vulnerability's severity is amplified by its authentication-free nature, meaning that any remote attacker can exploit this flaw without requiring valid credentials or prior access to the system. The affected component operates within the web application's payment authentication module, suggesting that this vulnerability could potentially compromise the entire payment processing infrastructure of the WiFi management system.
The technical implementation of this SQL injection vulnerability occurs when user input from the passcode parameter is directly incorporated into SQL query construction without proper sanitization or parameterization. This allows an attacker to manipulate the underlying database queries by injecting malicious SQL code through the passcode field. The flaw follows the characteristics of CWE-89, which defines SQL injection as the improper inclusion of user-controllable data into SQL queries, creating opportunities for unauthorized data access, modification, or deletion. Attackers can leverage this vulnerability to extract sensitive information from the database, potentially including user credentials, payment details, or other confidential data stored within the system's backend. The lack of authentication requirements makes this attack vector particularly dangerous as it eliminates the need for credential compromise or access privilege escalation.
The operational impact of this vulnerability extends beyond simple data theft, as it could enable attackers to gain complete control over the payment processing functionality of the D-Link Central WiFi Manager. This includes the potential to modify payment records, create fraudulent transactions, or even execute arbitrary commands on the database server. The vulnerability affects the core payment authentication mechanism, which could disrupt legitimate business operations and compromise customer trust. According to ATT&CK framework category T1190, this represents a network service boundary exploitation technique where attackers target web applications to gain unauthorized access to backend systems. The impact is particularly severe for organizations using this WiFi management system, as they may face regulatory compliance violations, financial losses, and reputational damage from unauthorized access to payment data.
Organizations should immediately implement mitigations including applying the vendor-provided patch version v1.03R0100_BETA6 which addresses the SQL injection vulnerability through proper input validation and parameterized query implementation. Network segmentation and firewall rules should be configured to restrict access to the affected web application interfaces, particularly limiting access to only trusted administrative networks. Input validation measures must be implemented at the application level to sanitize all user inputs, especially those used in database queries, following the principle of least privilege. Additionally, organizations should conduct comprehensive security assessments of their network infrastructure to identify any other potentially vulnerable components and implement proper database access controls to limit the impact of any successful exploitation attempts. The vulnerability serves as a critical reminder of the importance of secure coding practices and regular security updates in maintaining the integrity of network management systems.