CVE-2023-45820 in Directus
Summary
by MITRE • 10/25/2023
Directus is a real-time API and App dashboard for managing SQL database content. In affected versions any Directus installation that has websockets enabled can be crashed if the websocket server receives an invalid frame. A malicious user could leverage this bug to crash Directus. This issue has been addressed in version 10.6.2. Users are advised to upgrade. Users unable to upgrade should avoid using websockets.
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Analysis
by VulDB Data Team • 11/11/2023
The vulnerability identified as CVE-2023-45820 affects Directus, a real-time API and application dashboard designed for managing SQL database content through a web interface. This security flaw specifically targets installations that have websockets enabled, creating a potential attack vector that could lead to service disruption. The issue stems from the websocket server's inadequate handling of malformed or invalid frame data, which can cause the entire Directus application to crash. This represents a critical availability threat that directly impacts the reliability and uptime of database management systems relying on this platform. The vulnerability exists in versions prior to 10.6.2, making all affected installations susceptible to exploitation by malicious actors who understand the websocket protocol implementation details.
The technical nature of this vulnerability manifests as a lack of proper input validation within the websocket server component of Directus. When the server receives an invalid frame, it fails to gracefully handle the malformed data, resulting in an application crash that terminates the websocket connection and potentially impacts the broader system stability. This type of flaw falls under the category of improper input validation as classified by CWE-20, where the system fails to properly validate or sanitize input data before processing. The websocket protocol implementation appears to lack robust error handling mechanisms that would allow the server to reject invalid frames without compromising the overall service availability. This vulnerability is particularly concerning because it allows remote attackers to execute a denial of service attack simply by sending malformed websocket frames, requiring no authentication or privileged access.
The operational impact of CVE-2023-45820 extends beyond simple service disruption, as it can severely compromise the availability of database management operations that depend on Directus for real-time content delivery. Organizations using Directus with websocket functionality face potential downtime that could affect content management workflows, real-time data synchronization, and user access to database interfaces. The vulnerability directly maps to attack techniques described in the MITRE ATT&CK framework under the T1499 category for network denial of service attacks, where adversaries leverage application-level flaws to disrupt services. This issue affects the availability component of the CIA triad, potentially causing cascading effects throughout applications that rely on Directus for content management and database access. The crash condition can occur during normal operation or as a result of automated scanning activities, making it difficult to predict and prevent.
Organizations should prioritize upgrading to Directus version 10.6.2 or later to address this vulnerability, as this release includes the necessary patches to properly handle invalid websocket frames and prevent system crashes. The recommended mitigation strategy involves immediate deployment of the patched version to eliminate the risk of exploitation. For organizations unable to perform an immediate upgrade, disabling websocket functionality within the Directus configuration serves as an effective temporary workaround that prevents exploitation while maintaining core database management capabilities. Security teams should monitor their Directus installations for any signs of attempted exploitation and consider implementing network-level controls to restrict websocket connections where possible. The vulnerability highlights the importance of proper input validation and error handling in real-time communication protocols, particularly in enterprise content management systems where availability is critical for business operations.