CVE-2008-0669 in Unity
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in search.cgi in Sift Unity allows remote attackers to inject arbitrary web script or HTML via the qt parameter. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.
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Analysis
by VulDB Data Team • 11/12/2017
The vulnerability identified as CVE-2008-0669 represents a classic cross-site scripting flaw within the Sift Unity search functionality, specifically in the search.cgi script. This issue falls under the CWE-79 category of Cross-Site Scripting, which is one of the most prevalent and dangerous web application security vulnerabilities. The vulnerability manifests through the qt parameter in the search.cgi script, which fails to properly sanitize or encode user input before processing and displaying it within web responses. This allows malicious actors to inject arbitrary HTML or JavaScript code that executes in the context of other users' browsers who view the affected search results.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious payload containing script code within the qt parameter of the search request. When the vulnerable application processes this input and displays it in the search results page without proper output encoding or filtering, the injected code becomes part of the page's content. This creates a persistent XSS vector that can be triggered whenever other users access the affected search results, making it particularly dangerous for web applications that display user-generated content or search queries. The attack leverages the trust relationship between the web application and its users, executing malicious code in the victim's browser context with the privileges of the logged-in user.
The operational impact of this vulnerability extends beyond simple script injection, potentially enabling attackers to perform session hijacking, defacement of web pages, theft of sensitive information, or redirection to malicious sites. In the context of Sift Unity, which appears to be a web-based application, this vulnerability could compromise user sessions, allowing attackers to impersonate legitimate users and access restricted functionality. The attack surface is particularly concerning given that search functionality is typically accessible to all users, making the exploitation vector widespread and difficult to control. This vulnerability aligns with ATT&CK technique T1531 for "Run Virtual Machine from Memory" and T1059.007 for "Command and Scripting Interpreter: JavaScript", demonstrating how XSS can serve as a foundation for more sophisticated attacks.
Mitigation strategies for CVE-2008-0669 require immediate implementation of proper input validation and output encoding mechanisms. The application must sanitize all user inputs, particularly those used in dynamic content generation, through the use of strict input validation that rejects or encodes potentially dangerous characters. Implementing Content Security Policy headers can provide additional defense-in-depth by restricting script execution within the application. The most effective remediation involves proper output encoding of all dynamic content before rendering it in web pages, ensuring that any user-supplied data is treated as data rather than executable code. Organizations should also implement regular security testing including automated scanning and manual penetration testing to identify similar vulnerabilities in other web application components. This vulnerability highlights the critical importance of input validation and output encoding practices as recommended by OWASP Top Ten and ISO/IEC 27001 security standards, emphasizing that XSS protection should be integrated into all web application development processes rather than addressed as an afterthought.