CVE-2007-0950 in ASP Hosting Site
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in listmain.asp in Fullaspsite ASP Hosting Site allows remote attackers to inject arbitrary web script or HTML via the cat parameter.
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Analysis
by VulDB Data Team • 07/29/2024
The vulnerability identified as CVE-2007-0950 represents a classic cross-site scripting flaw within the Fullaspsite ASP Hosting Site application, specifically affecting the listmain.asp component. This security weakness resides in the improper handling of user-supplied input parameters, creating an exploitable condition that enables malicious actors to execute arbitrary web scripts or HTML code within the context of affected user sessions. The vulnerability manifests through the cat parameter, which serves as the attack vector for injecting malicious payloads into the web application's response.
The technical implementation of this XSS vulnerability stems from insufficient input validation and output encoding within the ASP application's processing logic. When the application receives the cat parameter through user requests, it fails to properly sanitize or encode the input before incorporating it into dynamic web content generation. This omission allows attackers to craft malicious payloads that, when executed, can manipulate the browser behavior of unsuspecting users who view the affected page. The vulnerability operates at the client-side execution level, making it particularly dangerous as it can persistently affect users who interact with compromised content.
The operational impact of this vulnerability extends beyond simple script injection, potentially enabling attackers to perform session hijacking, steal sensitive user information, or redirect victims to malicious websites. An attacker could exploit this weakness to execute malicious scripts that capture user credentials, modify page content, or establish persistent backdoors within the application environment. The vulnerability's classification under CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') aligns with established patterns of XSS exploitation where insufficient validation allows attackers to inject malicious code that executes in the context of other users' browsers.
From an attack perspective, this vulnerability fits within the ATT&CK framework under T1059.007 - Command and Scripting Interpreter: JavaScript, as it enables the execution of malicious JavaScript code through web-based interfaces. The exploitation requires minimal technical expertise, making it a preferred target for attackers seeking to compromise web applications. The vulnerability affects any user who interacts with the listmain.asp page when the cat parameter contains malicious input, potentially creating widespread impact across all users of the affected hosting site.
Mitigation strategies for this vulnerability involve implementing comprehensive input validation and output encoding mechanisms throughout the application. The most effective approach requires sanitizing all user-supplied input parameters, including the cat parameter, before processing or displaying them within web pages. This includes implementing proper HTML entity encoding for all dynamic content and establishing strict input validation rules that reject potentially malicious payloads. Additionally, implementing a Content Security Policy (CSP) header can provide an additional layer of protection by restricting the sources from which scripts can be executed. Organizations should also consider implementing proper web application firewall rules that can detect and block common XSS attack patterns, ensuring that the application maintains robust defenses against similar vulnerabilities. The remediation process should include thorough code review to identify all potential input vectors and ensure that output encoding is consistently applied across all dynamic content generation processes.