CVE-2007-0798 in Ublog Reload
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in Ublog Reload 1.0.5 allow remote attackers to inject arbitrary web script or HTML via unspecified parameters to (1) login.asp; and allow remote authenticated users to inject arbitrary web script or HTML via unspecified parameters to (2) badword.asp, (3) polls.asp, and (4) users.asp.
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Analysis
by VulDB Data Team • 08/09/2022
The vulnerability described in CVE-2007-0798 represents a critical cross-site scripting flaw affecting Ublog Reload version 1.0.5, a web-based blogging platform. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is one of the most prevalent and dangerous web application security flaws. The vulnerability exists due to insufficient input validation and output encoding mechanisms within the application's core components, specifically targeting several key administrative and user-facing pages. The flaw allows both unauthenticated and authenticated attackers to inject malicious scripts into the web application's response, potentially compromising user sessions and enabling various malicious activities.
The technical implementation of this vulnerability stems from the application's failure to properly sanitize user-supplied input across multiple endpoints. Attackers can exploit this weakness by crafting malicious payloads and submitting them through unspecified parameters in the affected pages login.asp, badword.asp, polls.asp, and users.asp. The vulnerability affects both remote unauthenticated users who can exploit login.asp and authenticated users who can leverage the flaw in the other three administrative pages. This dual exploitation capability significantly increases the attack surface and potential impact of the vulnerability. The root cause lies in the application's inadequate filtering of special characters and HTML entities in user input, allowing malicious scripts to be executed within the context of legitimate user sessions.
The operational impact of this vulnerability extends beyond simple script injection, creating potential pathways for session hijacking, credential theft, and data manipulation. An attacker exploiting these vulnerabilities could redirect users to malicious sites, steal session cookies, or modify content on the blog platform. The authenticated exploitation through badword.asp, polls.asp, and users.asp particularly concerns administrators who might be tricked into executing malicious scripts while performing routine administrative tasks. This could lead to complete compromise of the blogging platform, allowing attackers to modify user permissions, inject backdoors, or exfiltrate sensitive data. The vulnerability's persistence across multiple administrative functions indicates a systemic flaw in the application's input handling architecture.
Mitigation strategies for this vulnerability require immediate implementation of comprehensive input validation and output encoding measures. Organizations should apply the vendor-provided patches or upgrade to a newer version of Ublog Reload that addresses these XSS vulnerabilities. The remediation approach should include implementing proper HTML entity encoding for all user-supplied input before rendering it in web pages, employing Content Security Policy headers to limit script execution, and implementing input validation that rejects or sanitizes potentially malicious content. Security teams should also conduct thorough code reviews focusing on user input handling across all application components and establish proper security testing procedures including automated scanning and manual penetration testing. Additionally, implementing web application firewalls and monitoring for suspicious input patterns can provide additional layers of protection against exploitation attempts. The vulnerability's classification under CWE-79 emphasizes the need for comprehensive defensive measures that address the fundamental issue of improper input validation in web applications.