Authentication / Credit Card Numbers Disclosed
Credit card numbers disclosed is an authentication vulnerability (CWE-522) where credit card numbers, expiration dates, and CVV numbers are exposed during authentication. This vulnerability is commonly found in web applications and APIs (OWASP Testing Guide, V3.0). This type of vulnerability can be exploited with malicious intent, such as stealing credit card information.
This vulnerability can cause serious financial damages to businesses, customers, and users, as well as lead to a data breach. Credit card numbers disclosed is considered a high-risk vulnerability, as it allows attackers to gain access to personal, financial, and other sensitive information.
The best way to mitigate this vulnerability is to ensure that authentication systems are properly configured and tested. Authentication processes should be designed with measures to securely encrypt any credit card information that is transmitted or stored. Additionally, authorization systems should be regularly monitored for any signs of unauthorized access or exposure of credit card information.
Below is an example of code vulnerable to credit card numbers disclosure, taken from the CVE-2019-17496.
<?php $url = "https://example.com/api/v1/credit_cards"; $data=array('credit_card_number' => $_POST['cc_num'], 'expiration_date' => $_POST['expiration_date'], 'cvv' => $_POST['cvv']); $data = json_encode($data); $ch = curl_init($url); curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json', 'Authorization: Bearer ' . $bearer_token)); curl_setopt($ch, CURLOPT_POST, true); curl_setopt($ch, CURLOPT_POSTFIELDS, $data); curl_exec($ch); curl_close($ch); ?>