CVE-2007-6090 in Nuked-Klan
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in index.php in Nuked-Klan 1.7.5 allows remote attackers to inject arbitrary web script or HTML via the file 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 • 09/11/2018
The vulnerability identified as CVE-2007-6090 represents a critical cross-site scripting flaw within the Nuked-Klan 1.7.5 content management system, specifically affecting the index.php script. This security weakness resides in the improper handling of user-supplied input through the file parameter, creating an exploitable condition that enables remote attackers to inject malicious web scripts or HTML code into the application's response. The vulnerability's classification as a persistent XSS issue stems from the application's failure to adequately sanitize or validate input data before rendering it within the web page context.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious payload containing JavaScript code or HTML elements and submits it through the vulnerable file parameter in the index.php script. When the application processes this input without proper sanitization, the malicious code becomes embedded within the page's HTML output and executes in the context of other users' browsers who view the affected page. This creates a dangerous attack vector where malicious actors can steal session cookies, perform unauthorized actions on behalf of victims, or redirect users to malicious websites. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws in software applications, particularly those involving improper input validation and output encoding.
The operational impact of this vulnerability extends beyond simple script injection, as it fundamentally compromises the integrity and security of the entire Nuked-Klan platform. Attackers can leverage this weakness to execute arbitrary code in users' browsers, potentially leading to complete session hijacking, data theft, or the deployment of additional malware. The vulnerability affects the application's core functionality by undermining user trust and potentially allowing attackers to gain unauthorized access to sensitive information or administrative capabilities. From an attacker's perspective, this vulnerability provides a persistent means of compromising user sessions and can be used to establish a foothold for further attacks within the network or system environment.
Security professionals should implement multiple layers of defense to mitigate this vulnerability, beginning with immediate input validation and output encoding measures. The recommended approach includes implementing strict input sanitization routines that filter or escape special characters in all user-supplied parameters, particularly those that are rendered within HTML contexts. Organizations should also deploy proper content security policies and implement proper output encoding techniques to prevent malicious scripts from executing in browser contexts. Additionally, regular security audits and code reviews should be conducted to identify similar input validation flaws within the application's codebase, as this vulnerability demonstrates the importance of comprehensive security testing. The mitigation strategies align with ATT&CK technique T1566 which covers social engineering tactics including the use of malicious links and scripts to compromise user systems, making this vulnerability particularly dangerous in environments where users may not be security-aware.
The broader implications of this vulnerability highlight the critical importance of maintaining up-to-date security practices in web application development. Legacy systems like Nuked-Klan 1.7.5 often contain multiple unpatched vulnerabilities due to their age and lack of ongoing security maintenance, making them attractive targets for attackers. This particular vulnerability serves as a reminder that even minor input handling flaws can create significant security risks, emphasizing the need for comprehensive security testing and validation of all user-supplied data. Organizations should prioritize the implementation of robust security frameworks that automatically handle input validation and output encoding, reducing the likelihood of similar vulnerabilities being introduced into future applications. The vulnerability also underscores the importance of proper security patch management and the risks associated with using outdated software systems that may contain known vulnerabilities.