CVE-2006-0239 in Simple Blog
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in Simple Blog 2.1 allow remote attackers to inject arbitrary web script or HTML via (1) a comment to comments.asp and (2) possibly certain other fields in unspecified scripts.
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Analysis
by VulDB Data Team • 08/01/2017
The vulnerability identified as CVE-2006-0239 represents a critical security flaw in Simple Blog 2.1 that exposes the application to multiple cross-site scripting attacks. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is a fundamental web application security weakness that allows attackers to inject malicious scripts into web pages viewed by other users. The flaw specifically affects the comment handling functionality within the comments.asp script, creating an entry point for malicious actors to execute unauthorized code within the context of users' browsers. The vulnerability's impact extends beyond just the comments.asp file, as the description suggests that other unspecified scripts within the application may also be susceptible to similar attacks, indicating a broader architectural issue with input validation and output encoding practices.
The technical exploitation of this vulnerability occurs when remote attackers submit malicious content through comment fields or other input parameters that are not properly sanitized or validated. When users view the affected web pages, their browsers execute the injected scripts, potentially leading to session hijacking, credential theft, or redirection to malicious websites. The vulnerability's severity is compounded by the fact that it affects core application functionality where user input is expected and processed, making it particularly dangerous in a blogging platform where users regularly submit content. The lack of specific identification for other affected scripts suggests that the vulnerability may stem from a general lack of input sanitization throughout the application rather than isolated flaws in specific files.
Operationally, this vulnerability creates significant risks for both end users and administrators of Simple Blog 2.1 installations. Users who visit compromised blog pages may unknowingly execute malicious code that can steal cookies, session tokens, or other sensitive information. Attackers can leverage this vulnerability to perform session hijacking attacks, where they gain unauthorized access to user accounts and potentially administrative privileges. The impact extends to the overall integrity of the blog platform, as malicious scripts could modify content, redirect users to phishing sites, or even install malware on user systems. From an attacker's perspective, this vulnerability provides a persistent and scalable attack vector that requires minimal technical expertise to exploit effectively, making it particularly attractive for automated or mass exploitation campaigns.
The mitigation strategies for this vulnerability should focus on implementing robust input validation and output encoding mechanisms throughout the application. Developers must ensure that all user-supplied input is properly sanitized before being processed or displayed, implementing both client-side and server-side validation controls. The application should employ proper HTML escaping techniques when rendering user-generated content to prevent script execution in browser contexts. Security patches should be implemented immediately to address the specific XSS vulnerabilities in comments.asp and any other identified input fields. Organizations should also consider implementing Content Security Policy headers to add an additional layer of protection against script injection attacks. Regular security audits and code reviews should be conducted to identify and remediate similar vulnerabilities across the entire application codebase, following industry standards such as those outlined in the OWASP Top Ten and NIST cybersecurity guidelines. The vulnerability serves as a reminder of the critical importance of secure coding practices and the need for comprehensive security testing before deploying web applications to production environments.