CVE-2008-3581 in K-Links
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in index.php in Qsoft K-Links allows remote attackers to inject arbitrary web script or HTML via the login_message parameter in a login action.
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Analysis
by VulDB Data Team • 11/03/2024
The CVE-2008-3581 vulnerability represents a classic cross-site scripting flaw in the Qsoft K-Links web application, specifically within the index.php file. This vulnerability arises from inadequate input validation and output sanitization mechanisms that fail to properly handle user-supplied data in the login_message parameter. The flaw exists in the authentication flow where the application accepts user input without proper encoding or filtering, creating an opportunity for malicious actors to execute arbitrary scripts in the context of other users' browsers. The vulnerability is categorized under CWE-79 as "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", which is one of the most prevalent and dangerous web application security weaknesses identified by the CWE organization.
The technical exploitation of this vulnerability occurs when remote attackers craft malicious payloads containing script code and submit them through the login_message parameter during the login process. When the application processes this input and renders it back to the user interface without proper HTML escaping or context-appropriate encoding, the injected scripts execute in the victim's browser. This allows attackers to perform various malicious activities including session hijacking, credential theft, defacement of web pages, or redirection to malicious sites. The vulnerability is particularly concerning because it occurs during the login action, which is a critical point of user interaction where attackers can potentially capture authentication tokens or manipulate user sessions. This aligns with ATT&CK technique T1566.001 for "Phishing: Spearphishing Attachment" where the initial compromise is achieved through web-based malicious content delivery.
The operational impact of this vulnerability extends beyond simple script injection, as it can lead to complete compromise of user sessions and potential lateral movement within the application environment. An attacker who successfully exploits this vulnerability can manipulate the login interface to redirect users to phishing pages, steal session cookies, or inject malicious content that persists across user sessions. The vulnerability affects the integrity and confidentiality of the web application's authentication system, potentially allowing unauthorized access to sensitive user accounts and data. Organizations using Qsoft K-Links would face significant risk exposure since the vulnerability is present in core authentication functionality, making it a prime target for attackers seeking persistent access to their systems. The flaw demonstrates poor security practices in input handling and output encoding, which are fundamental requirements for secure web application development as outlined in OWASP Top Ten and the ISO 27001 security framework.
Mitigation strategies for CVE-2008-3581 require immediate implementation of proper input validation and output encoding mechanisms throughout the application. Developers should employ context-specific encoding for all user-supplied data, particularly when rendering content in HTML contexts, to prevent script execution. The recommended approach involves implementing strict input validation that filters or rejects potentially malicious content while maintaining application functionality. Organizations should also deploy web application firewalls to detect and block suspicious script injection attempts, and implement content security policies to limit script execution capabilities in the browser. Regular security assessments and code reviews focusing on input/output handling should be conducted to identify similar vulnerabilities in other application components. Additionally, the application should be updated to a version that properly addresses this vulnerability, as the original Qsoft K-Links version containing this flaw is likely outdated and may contain additional security weaknesses. Security awareness training for developers on secure coding practices and the importance of proper input sanitization should be implemented to prevent similar issues in future development cycles.