CVE-2024-24751 in sf_event_mgt Extension
Summary
by MITRE • 02/13/2024
sf_event_mgt is an event management and registration extension for the TYPO3 CMS based on ExtBase and Fluid. In affected versions the existing access control check for events in the backend module got broken during the update of the extension to TYPO3 12.4, because the `RedirectResponse` from the `$this->redirect()` function was never handled. This issue has been addressed in version 7.4.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.
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Analysis
by VulDB Data Team • 10/18/2024
The vulnerability identified as CVE-2024-24751 affects the sf_event_mgt extension for TYPO3 CMS, specifically targeting the backend module's access control mechanisms. This extension serves as an event management and registration system built on ExtBase and Fluid frameworks within the TYPO3 ecosystem. The flaw emerged during the extension's migration to TYPO3 version 12.4, where the existing security controls were inadvertently compromised. The core issue lies in how the extension handles HTTP redirects within its backend functionality, creating a potential pathway for unauthorized access to event management features.
The technical root cause involves the improper handling of RedirectResponse objects generated by the `$this->redirect()` function within the extension's codebase. When the extension was updated to TYPO3 12.4, developers introduced a code path where the redirect functionality was implemented but never properly processed or executed. This creates a scenario where access control checks may appear to succeed, but the actual redirection mechanism fails to enforce the intended security boundaries. The vulnerability manifests as a bypass of authentication and authorization controls, allowing unauthorized users to potentially access backend event management features that should be restricted to authorized personnel.
From an operational perspective, this vulnerability represents a critical security risk for TYPO3 installations utilizing the sf_event_mgt extension. The impact extends beyond simple privilege escalation as it undermines the fundamental security model of the TYPO3 backend system. Attackers could exploit this weakness to modify, delete, or create events without proper authorization, potentially leading to data integrity issues, unauthorized event registration, or even the complete compromise of event management functionality. The vulnerability affects all versions prior to 7.4.0, making it particularly concerning for organizations that have not yet upgraded their systems. The lack of known workarounds means that organizations must rely entirely on the vendor-provided patch to address the security gap.
Organizations should prioritize immediate remediation by upgrading to sf_event_mgt version 7.4.0 or later, which contains the necessary fixes to properly handle the RedirectResponse objects and restore the intended access control mechanisms. Security teams should also conduct comprehensive audits of their TYPO3 installations to identify any other extensions that may have undergone similar migration issues. The vulnerability aligns with CWE-284, which addresses improper access control in software systems, and could potentially map to ATT&CK techniques related to privilege escalation and unauthorized access. System administrators should monitor their TYPO3 environments for any suspicious activities following the upgrade process, as the compromised access controls might have been exploited prior to the patch release. The incident underscores the importance of thorough security testing during framework upgrades and the critical need for proper handling of redirect mechanisms in web applications.