CVE-2008-0826 in Caroline
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Claroline before 1.8.9 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 09/16/2018
The CVE-2008-0826 vulnerability represents a critical cross-site scripting flaw discovered in the Claroline learning management system prior to version 1.8.9. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is one of the most prevalent and dangerous web application security weaknesses identified by the CWE organization. Claroline, a widely-used open-source e-learning platform, was found to be susceptible to malicious script injection attacks that could compromise user sessions and potentially lead to broader system exploitation. The vulnerability's classification as a remote attack vector means that malicious actors could exploit this weakness without requiring physical access to the target system, making it particularly dangerous in web-based environments where users interact with the platform regularly.
The technical implementation of this XSS vulnerability stems from inadequate input validation and output sanitization within Claroline's codebase. Attackers could leverage this weakness by crafting malicious payloads that would be executed in the context of other users' browsers when they accessed affected pages or interacted with the vulnerable application components. The unspecified vectors mentioned in the original description suggest that the vulnerability could potentially be exploited through multiple entry points within the application, including user input fields, URL parameters, or even server responses that failed to properly escape or validate user-supplied data. This broad attack surface increases the likelihood of successful exploitation and makes the vulnerability particularly challenging to defend against comprehensively.
The operational impact of this vulnerability extends beyond simple script execution, as it creates opportunities for session hijacking, credential theft, and potential privilege escalation within the learning management environment. Users who logged into Claroline could unknowingly execute malicious scripts that would capture their session cookies or redirect them to phishing sites designed to harvest login credentials. The attack could also enable persistent XSS payloads that would affect all users who viewed the compromised content, potentially allowing attackers to gain unauthorized access to student records, course materials, or administrative functions. Organizations relying on Claroline for educational purposes faced significant risks to data integrity and user privacy, particularly in environments where sensitive academic information was stored or transmitted through the platform.
Security mitigations for CVE-2008-0826 should focus on immediate patch deployment to version 1.8.9 or later, which addressed the core input validation issues that allowed the XSS exploitation. Organizations should implement comprehensive input sanitization measures, including the use of proper HTML escaping techniques and output encoding for all user-supplied data before rendering it within web pages. The implementation of Content Security Policy (CSP) headers can provide additional defense-in-depth measures by restricting the sources from which scripts can be loaded and executed within the application context. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other web applications, while security awareness training for administrators can help prevent social engineering attacks that might exploit this vulnerability. The ATT&CK framework categorizes this type of vulnerability under T1059.007 for Scripting and T1531 for Account Access Removal, highlighting the multi-layered nature of the threat landscape that such vulnerabilities create for security operations teams.