CVE-2006-2167 in SF-Users
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in SloughFlash SF-Users 1.0, possibly in register.php, allows remote attackers to inject arbitrary web script or HTML by setting the username field to contain JavaScript in the SRC attribute of an IMG element.
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Analysis
by VulDB Data Team • 06/21/2019
The CVE-2006-2167 vulnerability represents a classic cross-site scripting flaw affecting the SloughFlash SF-Users 1.0 web application. This vulnerability specifically targets the registration functionality where user input is not properly sanitized or validated before being stored and subsequently displayed on web pages. The issue manifests when attackers exploit the username field in the register.php component by injecting malicious javascript code within the src attribute of an img element, creating a persistent XSS vector that can compromise user sessions and data integrity.
This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is one of the most prevalent and dangerous web application security flaws. The attack vector operates through the injection of malicious script code that executes in the context of other users' browsers when they view pages containing the compromised username data. The specific implementation flaw in SF-Users 1.0 demonstrates poor input validation and output encoding practices, where the application fails to properly escape or filter user-supplied content before rendering it in web pages. The use of img tag with javascript in the src attribute represents a sophisticated exploitation technique that bypasses basic security filters and can execute in modern browsers without requiring user interaction beyond visiting a compromised page.
The operational impact of this vulnerability extends beyond simple script injection, as it creates a persistent threat that can be leveraged for session hijacking, credential theft, and data exfiltration. When legitimate users browse pages displaying the compromised usernames, their browsers execute the injected javascript code, potentially allowing attackers to steal cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users. The vulnerability affects the core user management functionality of the application, making it particularly dangerous as it can be exploited to compromise multiple user accounts and potentially gain deeper access to the underlying system. According to ATT&CK framework, this vulnerability maps to T1059.007 for Command and Scripting Interpreter and T1566 for Phishing, as it enables attackers to craft malicious web content that can be delivered to unsuspecting users through social engineering or automated exploitation.
Mitigation strategies for this vulnerability require implementing comprehensive input validation and output encoding mechanisms throughout the application. The primary defense involves sanitizing all user input, particularly in fields that are later displayed on web pages, by removing or escaping potentially dangerous characters and patterns. The application should implement proper HTML entity encoding when displaying user-generated content to prevent script execution in browser contexts. Additionally, developers should implement Content Security Policy headers to limit script execution and prevent unauthorized code injection. Regular security testing including dynamic application security testing and manual code reviews should be conducted to identify and remediate similar vulnerabilities. The fix should also include proper session management practices and input length restrictions to minimize the attack surface and ensure that the application maintains robust security controls against XSS attacks.