CVE-2005-3436 in Nuked-Klan
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Nuked-Klan 1.7 allows remote attackers to inject arbitrary web script or HTML via the (1) Search module, (2) certain edit fields in Guestbook, (3) the title in the Forum module, and (4) Textbox.
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Analysis
by VulDB Data Team • 07/12/2018
The vulnerability described in CVE-2005-3436 represents a critical cross-site scripting flaw affecting Nuked-Klan 1.7, a content management system designed for clan websites and community platforms. This vulnerability falls under the Common Weakness Enumeration category CWE-79, which specifically addresses improper neutralization of input during web page generation, commonly known as cross-site scripting. The flaw manifests in multiple attack vectors within the application's core modules, creating numerous entry points for malicious actors to exploit. The vulnerability's severity is amplified by its presence across multiple functional areas of the system, including the search functionality, guestbook editing capabilities, forum title fields, and general text input areas, making it particularly dangerous for widespread exploitation.
The technical implementation of this vulnerability stems from inadequate input validation and output sanitization mechanisms within the Nuked-Klan 1.7 codebase. When users submit data through the affected modules, the application fails to properly sanitize or escape the input before rendering it in web pages. This allows attackers to inject malicious script code that executes in the context of other users' browsers. The attack vectors specifically target areas where user input is directly incorporated into HTML output without proper security measures. The search module vulnerability suggests that even simple search queries can carry malicious payloads, while the guestbook edit fields indicate that user-generated content management features are particularly susceptible. The forum title field represents a more sophisticated attack surface since forum titles often appear in navigation elements and page headers, potentially amplifying the impact of successful XSS exploitation.
The operational impact of this vulnerability extends beyond simple data theft or defacement, as it enables attackers to execute arbitrary scripts in victims' browsers with the privileges of authenticated users. This creates opportunities for session hijacking, credential theft, and the deployment of additional malicious payloads. The attack surface across multiple modules increases the likelihood of successful exploitation, as attackers can choose the most accessible vector for their attack. Users who visit pages containing malicious content or who interact with compromised guestbook entries may unknowingly execute harmful scripts that can redirect them to phishing sites, steal cookies, or perform actions on their behalf. The vulnerability essentially transforms legitimate user interactions into potential attack vectors, undermining the security model of the entire application.
Mitigation strategies for this vulnerability must address the fundamental input validation and output sanitization failures within the Nuked-Klan 1.7 codebase. Organizations should implement comprehensive input sanitization techniques that escape or filter all user-provided content before rendering it in web pages, particularly in areas where dynamic content is generated. The solution involves applying proper HTML entity encoding to all output that incorporates user input, ensuring that special characters are properly escaped to prevent script execution. Additionally, implementing Content Security Policy headers can provide an additional layer of protection against XSS attacks by restricting the sources from which scripts can be loaded. The recommended approach includes upgrading to patched versions of the application, if available, or implementing custom input validation routines that conform to established security standards. This vulnerability also highlights the importance of regular security assessments and input validation reviews, as it demonstrates how multiple entry points can collectively create a significant security risk. Organizations should also consider implementing web application firewalls and monitoring systems to detect and prevent exploitation attempts, as the attack surface across multiple modules requires comprehensive protection strategies.