CVE-2007-0552 in Oh No Not Another Cms
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in install/default/error404.html in Oh no! Not another CMS (Onnac) 0.0.8.4 and earlier allows remote attackers to inject arbitrary web script or HTML via the error_url parameter.
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Analysis
by VulDB Data Team • 03/02/2018
The vulnerability identified as CVE-2007-0552 represents a critical cross-site scripting flaw within the Oh no! Not another CMS version 0.0.8.4 and earlier installations. This security weakness resides in the error404.html file located within the install/default directory structure of the CMS framework. The vulnerability specifically manifests when the application processes the error_url parameter without proper input validation or sanitization mechanisms, creating an avenue for malicious actors to execute arbitrary web scripts or HTML code within the context of affected user sessions.
The technical implementation of this vulnerability stems from the application's failure to properly escape or filter user-supplied input before incorporating it into the error page output. When an attacker crafts a malicious URL containing crafted script code within the error_url parameter, the CMS renders this input directly into the HTML response without adequate security controls. This primitive form of input handling violates fundamental web application security principles and creates a persistent vector for malicious code execution. The vulnerability falls under CWE-79 which specifically addresses Cross-Site Scripting vulnerabilities, representing one of the most common and dangerous web application security flaws.
The operational impact of this vulnerability extends beyond simple script injection, as it enables attackers to perform various malicious activities including session hijacking, credential theft, and redirection to phishing sites. An attacker could craft a malicious URL that when visited by a victim, would execute scripts that steal cookies or session tokens, effectively compromising user authentication. The vulnerability's remote exploitation nature means attackers need not have physical access to the system, making it particularly dangerous for publicly accessible web applications. This flaw could also be leveraged for more sophisticated attacks such as defacement of the website or serving as a stepping stone for further network penetration attempts.
Mitigation strategies for this vulnerability require immediate implementation of proper input validation and output encoding mechanisms throughout the CMS framework. The most effective remediation involves implementing strict parameter validation that rejects or sanitizes any input containing potentially dangerous script tags or JavaScript protocols. Organizations should implement Content Security Policy headers to prevent execution of unauthorized scripts, while also ensuring that all user-supplied inputs undergo proper HTML entity encoding before being rendered in web pages. Additionally, the CMS should be upgraded to a version that addresses this vulnerability, as the affected version 0.0.8.4 represents an outdated release that likely contains multiple unpatched security issues. The ATT&CK framework categorizes this vulnerability under T1059.007 for Command and Scripting Interpreter: JavaScript, emphasizing the need for comprehensive input sanitization and output encoding as defensive measures against such attacks. Regular security audits and web application firewalls should also be deployed to monitor and block suspicious input patterns that may attempt to exploit similar vulnerabilities in the CMS infrastructure.