CVE-2006-2506 in Sphider
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in search.php in Sphider allow remote attackers to inject arbitrary web script or HTML via (1) the PATH_INFO and (2) the category parameter.
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Analysis
by VulDB Data Team • 07/27/2018
The vulnerability described in CVE-2006-2506 represents a critical cross-site scripting flaw in the Sphider search application that exposes users to potential malicious code execution. This vulnerability specifically affects the search.php script within the Sphider web application, which is commonly used for creating search engines and web content indexing systems. The flaw exists in how the application processes user input through two distinct parameter vectors, creating multiple attack surfaces for malicious actors seeking to exploit the system. The vulnerability classification aligns with CWE-79 which defines cross-site scripting as a weakness where untrusted data is incorporated into web pages without proper validation or sanitization, making it a fundamental web application security issue.
The technical implementation of this vulnerability occurs through improper input validation within the search.php script that handles both PATH_INFO and category parameters. When users submit search queries through these parameters, the application fails to adequately sanitize or escape the input data before incorporating it into the web response. This allows attackers to inject malicious HTML or JavaScript code that gets executed in the context of other users' browsers when they view the affected search results. The PATH_INFO parameter vulnerability suggests that the application incorrectly processes the PATH_INFO variable, which typically contains additional path information for web requests, while the category parameter indicates that search category filtering also lacks proper input validation. These issues create persistent XSS vulnerabilities that can be exploited across different sections of the application's functionality.
The operational impact of this vulnerability extends beyond simple data theft or defacement, as it enables attackers to perform various malicious activities through the compromised system. Attackers can leverage this vulnerability to steal session cookies, redirect users to malicious websites, inject phishing content, or even execute arbitrary commands on behalf of the victim user. The persistence of these vulnerabilities means that once exploited, they can affect all users who access the affected search functionality, potentially compromising large user bases within the application's scope. The vulnerability's severity is compounded by the fact that it affects core search functionality, which is typically accessed by many users, making it an attractive target for mass exploitation campaigns. This aligns with ATT&CK technique T1566 which covers social engineering attacks through malicious web content.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input validation and output encoding mechanisms within the Sphider application. The most effective approach involves sanitizing all user-provided input through proper escaping functions before incorporating it into web responses, specifically targeting both PATH_INFO and category parameters. Implementing Content Security Policy headers can provide additional protection layers by restricting script execution within the application context. Regular security audits and code reviews should be conducted to identify similar input handling issues, while developers should follow secure coding practices such as those outlined in the OWASP Secure Coding Practices. The vulnerability also highlights the importance of keeping web applications updated with the latest security patches, as this particular flaw was present in older versions of Sphider and would have been addressed through subsequent releases. Organizations should also implement web application firewalls to detect and block suspicious input patterns that attempt to exploit such vulnerabilities.