CVE-2024-45282 in S4 HANA
Summary
by MITRE • 10/08/2024
Fields which are in 'read only' state in Bank Statement Draft in Manage Bank Statements application, could be modified by MERGE method. The property of an OData entity representing assumably immutable method is not protected against external modifications leading to integrity violations. Confidentiality and Availability are not impacted.
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Analysis
by VulDB Data Team • 11/14/2024
The vulnerability described in CVE-2024-45282 represents a critical authorization and data integrity flaw within the Manage Bank Statements application's OData service implementation. This issue specifically affects the Bank Statement Draft functionality where certain fields are designated as read-only but can still be modified through the MERGE method. The vulnerability stems from inadequate access control mechanisms that fail to properly enforce the read-only state of these fields, creating a pathway for unauthorized data modification that directly violates the principle of least privilege and data integrity protection.
The technical implementation flaw manifests as a failure in the OData entity property validation logic where the system does not adequately check the read-only status of fields during MERGE operations. This allows attackers to bypass intended data protection measures by leveraging the MERGE method, which typically supports partial updates to entities. The vulnerability specifically targets the server-side validation mechanisms that should prevent modification of immutable fields, creating a condition where the system's defensive controls are effectively circumvented. This represents a classic example of insufficient authorization checking as categorized under CWE-284, where improper access control leads to unauthorized modifications of protected resources.
The operational impact of this vulnerability is significant as it allows malicious actors to alter critical financial data within bank statement drafts, potentially leading to financial fraud, data corruption, and compliance violations. The integrity violations could result in discrepancies between reported and actual financial transactions, affecting audit trails and regulatory compliance. While confidentiality and availability remain unaffected, the data integrity compromise creates a substantial risk for financial institutions that rely on accurate transaction records for operational and regulatory purposes. This vulnerability directly impacts the application's ability to maintain consistent and reliable data states, which is fundamental to financial transaction processing systems.
Organizations should implement immediate mitigations including strengthening OData service authorization checks to ensure that read-only properties cannot be modified through any update methods, including MERGE. The system should enforce property-level access controls that explicitly prevent modification of fields designated as read-only, regardless of the update method used. Security patches should be applied to correct the validation logic and ensure that all OData operations respect the intended field properties. Additionally, implementing comprehensive logging of all modification attempts, especially those targeting read-only fields, would provide visibility into potential exploitation attempts. This vulnerability aligns with ATT&CK technique T1566.001 for credential access through API abuse and represents a data integrity compromise that could facilitate further attacks through manipulation of financial records. The fix should involve comprehensive testing of all OData update methods against read-only field restrictions to prevent similar issues in other parts of the application.