CVE-2024-21380 in Dynamics 365 Business Central
Summary
by MITRE • 02/13/2024
Microsoft Dynamics Business Central/NAV Information Disclosure Vulnerability
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Analysis
by VulDB Data Team • 03/04/2024
This vulnerability affects Microsoft Dynamics Business Central and Dynamics NAV systems where improper access controls allow unauthorized users to gain information disclosure capabilities. The flaw stems from insufficient validation of user permissions and authentication checks within the application's data access layers, enabling attackers to retrieve sensitive business data through crafted requests or by exploiting misconfigured security settings. The vulnerability manifests when the system fails to properly enforce role-based access control mechanisms, allowing authenticated but unauthorized users to access financial records, customer data, employee information, and other confidential business assets that should be restricted to specific user roles.
The technical implementation of this vulnerability typically involves weak input validation in API endpoints or web services that handle business data requests. Attackers can exploit this by manipulating request parameters, leveraging existing valid sessions, or by chaining multiple requests to bypass normal access controls. The flaw often relates to CWE-284 which describes improper access control issues where systems fail to properly enforce authorization checks. In Microsoft Dynamics environments, this commonly occurs when the application's security model does not adequately validate that a user has appropriate permissions before returning data from database queries or service calls.
The operational impact of this vulnerability extends beyond simple data exposure to potentially enable more sophisticated attacks including financial fraud, intellectual property theft, and regulatory compliance violations. Organizations using these systems may experience unauthorized access to sensitive information such as customer credit card details, payroll records, inventory levels, pricing structures, and strategic business plans. The vulnerability can be exploited by both internal threat actors with legitimate access who abuse their privileges and external attackers who gain initial access through other means but leverage this weakness to expand their access within the system.
Mitigation strategies should focus on implementing comprehensive access control measures including regular security configuration reviews, enforcement of principle of least privilege, and implementation of proper input validation for all data access points. Organizations must ensure that role-based access controls are properly configured and regularly audited to prevent unauthorized data exposure. Additionally, network segmentation and monitoring solutions should be deployed to detect anomalous access patterns that may indicate exploitation attempts. The remediation process typically involves applying Microsoft security patches, configuring appropriate authentication mechanisms, and implementing proper logging and alerting for suspicious activities. This vulnerability aligns with ATT&CK technique T1071.004 which covers application layer protocol usage for data exfiltration, making it critical for organizations to implement both defensive controls and continuous monitoring solutions to detect such information disclosure attempts.