CVE-2007-4297 in Dersimiz Haber Ekleme Modulu
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in yorumkaydet.asp in Dersimiz Haber Ekleme Modulu allow remote attackers to inject arbitrary web script or HTML via the (1) yazan, (2) mail, and (3) yorum parameters. NOTE: some of these details are obtained from third party information.
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Analysis
by VulDB Data Team • 09/02/2017
The vulnerability identified as CVE-2007-4297 represents a critical cross-site scripting flaw within the Dersimiz Haber Ekleme Modulu content management system, specifically affecting the yorumkaydet.asp component. This vulnerability resides in the handling of user input parameters and demonstrates a classic XSS attack vector that enables malicious actors to execute arbitrary web scripts in the context of affected users' browsers. The flaw affects three distinct input parameters: yazan, mail, and yorum, which correspond to the author name, email address, and comment fields respectively, making it particularly dangerous as it can be exploited through multiple entry points within the comment submission process.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding mechanisms within the web application's backend processing. When users submit comments through the affected module, the application fails to properly sanitize or escape the input data before storing it in the database and subsequently rendering it back to other users browsing the content. This lack of proper sanitization creates an environment where malicious scripts can be injected and executed, with the yazan parameter typically used for author identification, mail for email addresses, and yorum for the actual comment text. The vulnerability aligns with CWE-79, which specifically addresses Cross-Site Scripting flaws in web applications, and demonstrates the classic pattern where user-controllable data flows directly into web page output without proper security controls.
The operational impact of this vulnerability extends beyond simple script injection, as it can enable attackers to perform a range of malicious activities including session hijacking, credential theft, and redirection to phishing sites. An attacker could craft malicious input in any of the three vulnerable parameters to inject JavaScript payloads that would execute in the browsers of other users who view the affected content. This could lead to unauthorized access to user accounts, data exfiltration, and potential compromise of the entire web application or underlying server infrastructure. The vulnerability particularly affects websites running the Dersimiz Haber Ekleme Modulu, which is commonly used for news and article management systems, making it a significant concern for content publishers and web administrators who rely on this module for user-generated content management.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term prevention measures. The primary fix involves implementing comprehensive input validation and output encoding for all user-supplied data, ensuring that any potentially malicious content is properly escaped before being stored or displayed. This includes implementing proper HTML entity encoding for all output, utilizing parameterized queries to prevent injection attacks, and implementing Content Security Policy headers to limit script execution. Organizations should also consider implementing Web Application Firewalls to detect and block suspicious input patterns, while establishing regular security testing procedures to identify similar vulnerabilities in other components of their web applications. The vulnerability demonstrates the importance of following secure coding practices and adhering to the OWASP Top Ten security guidelines, particularly those related to input validation and output encoding. Additionally, implementing proper access controls and monitoring user activities can help detect potential exploitation attempts and provide early warning of security incidents. This vulnerability serves as a reminder of the critical need for regular security assessments and the implementation of defense-in-depth strategies to protect web applications from persistent threats like cross-site scripting attacks.