CVE-2011-4830 in Com Listing
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in the com_listing component in Barter Sites component 1.3 for Joomla! allow remote authenticated users to inject arbitrary web script or HTML via the (1) listing_title, (2) description, (3) homeurl (aka Website Address), (4) paystring (aka Payment types accepted), (5) sell_price, (6) shipping_cost, and (7) quantity parameters to index.php.
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Analysis
by VulDB Data Team • 12/22/2024
The vulnerability identified as CVE-2011-4830 represents a critical cross-site scripting flaw within the com_listing component of the Barter Sites extension version 1.3 for Joomla component's processing logic, allowing attackers to execute malicious code within the context of authenticated user sessions.
The technical implementation of this vulnerability stems from the component's failure to properly sanitize user-supplied data before rendering it within web pages. When users submit content through any of the affected parameters, the system does not adequately filter or encode special characters that could be interpreted as executable script code. This lack of proper input sanitization creates an environment where attackers can inject malicious javascript or html payloads that will execute in the browsers of other users who view the compromised listings. The vulnerability is particularly dangerous because it affects authenticated users, meaning that attackers can leverage existing user privileges to maximize the impact of their attacks. The flaw aligns with CWE-79 which specifically addresses Cross-site Scripting vulnerabilities in web applications, and follows the typical exploitation patterns outlined in the ATT&CK framework under the technique of Web Application Attack.
The operational impact of CVE-2011-4830 extends beyond simple script injection, as it enables attackers to perform a range of malicious activities including session hijacking, credential theft, and data exfiltration. An attacker with access to the vulnerable system could craft malicious listings that would automatically execute scripts when viewed by other users, potentially stealing cookies, redirecting users to phishing sites, or even installing malware on victim machines. The authenticated nature of the vulnerability means that attackers can leverage legitimate user permissions to access restricted areas of the application, potentially leading to privilege escalation or unauthorized modifications to the site's content. This vulnerability undermines the integrity of the Joomla! platform's security model and could result in significant reputational damage to organizations using the affected component. Organizations may face regulatory compliance issues and potential legal consequences if user data is compromised through exploitation of this vulnerability.
Mitigation strategies for CVE-2011-4830 should include immediate implementation of input validation and output encoding measures to prevent script injection attacks. System administrators should ensure that all user-supplied data is properly sanitized before being processed or displayed, implementing proper HTML entity encoding for all dynamic content. The recommended approach involves applying the official security patch released by the component developers, as well as implementing web application firewalls that can detect and block malicious script injection attempts. Organizations should also consider implementing Content Security Policy headers to limit the execution of inline scripts and restrict external resource loading. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other components of the Joomla! platform. The vulnerability highlights the importance of proper security testing during software development and emphasizes the need for continuous monitoring of third-party extensions for security updates and patches. According to ATT&CK framework recommendations, organizations should implement defense-in-depth strategies that include both preventive measures and detection capabilities to protect against such web application vulnerabilities.