Concrete CMS is a widely used open-source content management system that provides a robust platform for building and managing websites. It is utilized by developers, businesses, and organizations to create scalable and flexible web applications. The software's flexibility allows extensive customization and integration with a variety of third-party plugins and modules. Concrete CMS is renowned for its user-friendly interface and ease of use, making it an ideal choice for both beginner and advanced users in web development. It is widely adopted for its strong capabilities in creating custom designs and its comprehensive set of tools for developers. Additionally, the software community provides extensive support and improvements, ensuring the CMS remains secure and up-to-date.
The vulnerability detected in Concrete CMS involves information disclosure through unauthenticated file usage. This vulnerability permits any unauthorized visitor to retrieve sensitive file usage information through a missing permission check in the usage controller. An attacker can exploit this vulnerability to list every web page that references a specified file, including details like page IDs, handles, and URLs. This exposure is significant as it may reveal restricted pages that are protected by permissions. By exploiting this vulnerability, malicious actors may gain insights into the website structure and its potentially sensitive areas.
The vulnerability is specifically tied to an endpoint that handles file usage request operations in Concrete CMS. The vulnerable endpoint is located at '/ccm/system/dialogs/file/usage/{fID}', which lacks proper permission verification, allowing unauthorized access. When an attacker accesses this endpoint with any file ID, it returns information about all pages referencing the file, including protected content structures. The lack of authenticated checks on this specific functionality is what exposes the vulnerability, giving attackers the advantage to potentially map and exploit the web application's structure.
When exploited, the vulnerability could potentially lead to exposure of confidential page associations and indirectly assist an attacker in planning further attacks targeted against specific paths or components. The disclosed information could facilitate social engineering attacks, reconnaissance, or unauthorized access attempts. Additionally, information disclosure might expose sensitive details about restricted pages, potentially revealing weaknesses or confidential data interactions to unauthorized parties.
REFERENCES
- Update Concrete CMS to a version beyond 9.5.0 to ensure any security patches for this vulnerability have been applied.
- Implement proper permission checks for sensitive operations to prevent unauthorized access.
- Review and secure web application endpoints to ensure adequate authentication and access controls are in place.
- Conduct regular security audits and vulnerability assessments to identify and remediate potential weaknesses.
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