CVE-2006-2820 in Weblog Oggi
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in HotWebScripts.com Weblog Oggi 1.0 allows remote attackers to inject arbitrary web script or HTML via a comment, possibly involving a javascript URI in the SRC attribute of an IMG element.
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Analysis
by VulDB Data Team • 09/17/2017
The CVE-2006-2820 vulnerability represents a classic cross-site scripting flaw in the Weblog Oggi 1.0 content management system developed by HotWebScripts.com. This vulnerability exists within the comment handling mechanism of the blogging platform, creating a significant security risk for users who interact with the system. The flaw specifically manifests when the application fails to properly sanitize user input in comment fields, allowing malicious actors to inject malicious code that executes in the context of other users' browsers. The vulnerability classification aligns with CWE-79, which defines improper neutralization of input during web page generation, commonly known as cross-site scripting. This weakness enables attackers to bypass the same origin policy that protects web browsers from malicious code execution.
The technical exploitation of this vulnerability occurs through the manipulation of comment fields where attackers can embed malicious scripts within HTML content. The specific attack vector involves the use of javascript URIs in the SRC attribute of IMG elements, which allows attackers to execute arbitrary code when other users view the compromised comment. This technique leverages the browser's interpretation of javascript protocol handlers within image sources, bypassing typical input validation measures. The vulnerability demonstrates a fundamental failure in output encoding and input sanitization, where user-supplied content containing potentially dangerous HTML or script elements is directly rendered without proper security filtering. The attack requires minimal privileges as it operates entirely through the public comment interface, making it particularly dangerous for public-facing web applications.
The operational impact of this vulnerability extends beyond simple script execution to encompass potential data theft, session hijacking, and malicious redirection. When victims view affected comments, their browsers execute the injected javascript code, which can steal cookies, capture keystrokes, or redirect users to malicious sites. The vulnerability creates a persistent threat vector that affects all users who view the compromised content, potentially compromising multiple user sessions and enabling long-term surveillance. Attackers can exploit this flaw to establish persistent backdoors, harvest sensitive information from authenticated sessions, or perform actions on behalf of compromised users. The vulnerability's impact is amplified by the fact that many blogging platforms do not adequately validate user comments, creating an environment where malicious code can persist indefinitely.
Mitigation strategies for CVE-2006-2820 should focus on implementing robust input validation and output encoding mechanisms. Organizations must ensure that all user-supplied content undergoes strict sanitization before being rendered in web pages, particularly in comment sections and other user-generated content areas. The implementation of Content Security Policy headers can provide additional protection by restricting script execution and preventing unauthorized code injection. According to ATT&CK framework, this vulnerability maps to T1059.007 for script injection techniques and T1566 for social engineering through malicious content delivery. Security measures should include regular security audits of web applications, implementation of web application firewalls, and comprehensive user input validation. The most effective approach involves strict HTML sanitization using libraries that strip dangerous elements while preserving legitimate content, combined with proper output encoding to prevent script execution in browser contexts. Regular patching and updating of web applications remains critical to addressing such vulnerabilities before they can be exploited in real-world scenarios.