CVE-2007-0083 in Nuked-Klan
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Nuked Klan 1.7 and earlier allows remote attackers to inject arbitrary web script or HTML via a javascript: URI in a getURL statement in a .swf file, as demonstrated by "Remote Cookie Disclosure." NOTE: it could be argued that this is an issue in Shockwave instead of Nuked Klan.
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Analysis
by VulDB Data Team • 08/13/2018
The vulnerability described in CVE-2007-0083 represents a cross-site scripting flaw that exists within the Nuked Klan content management system version 1.7 and earlier. This security weakness allows remote attackers to execute malicious web scripts or HTML code through a specific vector involving javascript: URIs within getURL statements contained in .swf file formats. The attack demonstrates a sophisticated approach to exploiting web application vulnerabilities by leveraging multimedia content to bypass traditional security measures. The vulnerability specifically targets how the system processes and renders flash content, creating an execution path where malicious code can be injected and subsequently executed in the context of a victim's browser session.
The technical flaw operates through the improper handling of user-supplied input within flash files, particularly when these files contain getURL statements that reference javascript: URIs. When a malicious .swf file is processed by Nuked Klan, the system fails to adequately sanitize or validate the URI references, allowing attackers to inject malicious javascript code that gets executed in the victim's browser. This particular vulnerability is classified under CWE-79 as Improper Neutralization of Input During Web Page Generation, which specifically addresses the failure to properly escape or filter user-controllable data before incorporating it into web page content. The attack vector demonstrates the dangerous intersection of multimedia content handling and web application security, where the exploitation occurs not through traditional web form inputs but through embedded flash content.
The operational impact of this vulnerability extends beyond simple script injection, as evidenced by the "Remote Cookie Disclosure" demonstration mentioned in the description. Attackers can leverage this XSS flaw to steal session cookies, user authentication tokens, and other sensitive information that would normally be protected by browser security mechanisms. The exploitation process typically involves crafting malicious flash files that contain getURL statements referencing javascript: URIs with malicious payloads. These payloads can redirect users to attacker-controlled domains, steal cookies, or perform other malicious activities that compromise user sessions and potentially lead to full account takeover. The vulnerability affects the entire user base of affected Nuked Klan installations, creating a significant risk for any organization relying on this CMS for content management.
Mitigation strategies for this vulnerability require a multi-layered approach focusing on both input validation and content security. Organizations should implement strict sanitization of all user-uploaded content, particularly multimedia files such as .swf files, ensuring that any URI references within these files are properly validated and filtered. The recommended defense in depth approach includes implementing content security policies that restrict the execution of javascript code from untrusted sources, utilizing web application firewalls to detect and block suspicious URI patterns, and ensuring that all systems are updated to versions that address this specific vulnerability. Additionally, administrators should consider implementing proper access controls and monitoring for unusual patterns of content upload activity that might indicate attempts to exploit this vulnerability. The ATT&CK framework categorizes this type of vulnerability under T1059.007 for Command and Scripting Interpreter: JavaScript, highlighting the importance of addressing client-side script execution vulnerabilities that can be leveraged for broader attack chains. Given the age of this vulnerability and the specific nature of the flaw in Nuked Klan, organizations should prioritize immediate remediation through software updates or migration to more modern CMS platforms that have better security practices and more robust input validation mechanisms.