CVE-2002-1699 in ASP Client Check
Summary
by MITRE
SQL injection vulnerability in ASP Client Check (ASPCC) 1.3 and 1.5 allows remote attackers to bypass authentication and gain unauthorized access via the password field.
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Analysis
by VulDB Data Team • 07/12/2019
The vulnerability identified as CVE-2002-1699 represents a critical SQL injection flaw within the ASP Client Check (ASPCC) versions 1.3 and 1.5, which operates as a web application security tool designed to validate client-side configurations and enforce access controls. This vulnerability resides in the authentication mechanism where user credentials are processed through the password field, creating an exploitable entry point that adversaries can leverage to bypass legitimate authentication procedures. The flaw stems from improper input validation and sanitization of user-supplied data, specifically within the SQL query construction process where direct concatenation of user inputs occurs without adequate escaping or parameterization.
The technical implementation of this vulnerability demonstrates a classic SQL injection attack vector where malicious input in the password field can manipulate the underlying database query execution flow. When an attacker submits specially crafted input containing SQL metacharacters or commands, the application fails to properly sanitize this data before incorporating it into database queries. This allows the attacker to inject arbitrary SQL code that can alter the intended query logic, potentially extracting user credentials, bypassing authentication checks, or even executing administrative database operations. The vulnerability specifically affects the authentication module of ASPCC, making it particularly dangerous as it directly compromises the system's access control mechanisms.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it provides attackers with potential pathways for further exploitation within the compromised system. Successful exploitation can result in complete system compromise, data theft, privilege escalation, and potential lateral movement within network environments where ASPCC is deployed. The vulnerability affects organizations using these specific versions of ASPCC, which were commonly deployed in web environments requiring client validation and access control. Attackers can leverage this weakness to gain unauthorized access to protected resources, potentially leading to data breaches, service disruption, and compliance violations. The remote nature of the attack means that exploitation can occur from any location without requiring physical access to the target system.
Security mitigations for this vulnerability must address the core issue of improper input handling and SQL query construction within the affected applications. Organizations should immediately apply patches or updates provided by the vendor to address the SQL injection flaw in ASPCC versions 1.3 and 1.5. Implementing proper input validation and sanitization techniques including parameterized queries, stored procedures, and proper escaping mechanisms can effectively prevent SQL injection attacks. Additionally, network segmentation, intrusion detection systems, and regular security assessments should be deployed to monitor for exploitation attempts. The vulnerability aligns with CWE-89 which specifically addresses SQL injection flaws, and represents a critical threat vector that maps to ATT&CK technique T1190 for exploitation of vulnerabilities in web applications. Organizations should also consider implementing web application firewalls and conducting thorough code reviews to identify similar patterns in other applications that may be susceptible to the same class of vulnerabilities.