CVE-2004-2732 in Netbilling
Summary
by MITRE
nbmember.cgi in Netbilling 2.0 allows remote attackers to obtain sensitive information via the cmd=test option, which can be leveraged to determine the access key.
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Analysis
by VulDB Data Team • 09/14/2024
The vulnerability identified as CVE-2004-2732 affects the nbmember.cgi component within Netbilling 2.0 payment processing software, representing a significant information disclosure weakness that exposes sensitive system credentials. This flaw resides in the command execution mechanism of the payment gateway software, where the cmd=test parameter fails to properly validate or sanitize user input, creating an avenue for unauthorized information retrieval. The vulnerability specifically impacts the security posture of e-commerce systems that rely on Netbilling 2.0 for transaction processing, as it allows remote attackers to extract critical access key information through a seemingly benign test command.
The technical exploitation of this vulnerability occurs through the manipulation of the cmd=test parameter within the nbmember.cgi script, which is designed to validate system functionality but inadvertently reveals sensitive configuration data. When an attacker submits a crafted request containing cmd=test, the application processes this input without adequate access controls or input validation, resulting in the exposure of access keys that are typically protected within the system's internal configuration files. This represents a classic case of insufficient input validation and inadequate privilege separation, where the test functionality becomes a vector for credential harvesting. The vulnerability aligns with CWE-20, which addresses improper input validation, and CWE-312, which covers exposure of sensitive information through data handling.
The operational impact of this vulnerability extends beyond simple information disclosure to potentially enable full system compromise and financial fraud. Once an attacker obtains the access key through this vulnerability, they can potentially manipulate payment transactions, redirect funds, or gain unauthorized access to the payment processing system. The remote nature of the attack means that threat actors do not require physical access to the system or network, making the vulnerability particularly dangerous for online merchants who depend on secure payment processing. This flaw creates a pathway for attackers to escalate their privileges and could lead to complete system takeover, as the access key typically provides elevated permissions within the payment processing infrastructure. The vulnerability also violates fundamental security principles outlined in the NIST Cybersecurity Framework, particularly in the areas of protection and detection.
Mitigation strategies for CVE-2004-2732 require immediate implementation of input validation controls and access restriction measures. Organizations should implement proper parameter validation on all user-supplied inputs, particularly within the cmd parameter of the nbmember.cgi script, to prevent unauthorized access to system functions. The recommended approach includes implementing strict input sanitization, enforcing proper access controls, and ensuring that test functions do not expose sensitive system information. Security measures should also include network segmentation to limit access to payment processing systems and regular security audits to identify similar vulnerabilities in legacy systems. Additionally, organizations should consider implementing web application firewalls to detect and block malicious requests targeting this specific vulnerability pattern. The remediation aligns with ATT&CK technique T1071.004, which covers application layer protocol manipulation, and emphasizes the importance of proper input validation and access control mechanisms in preventing information disclosure attacks.