CVE-2025-42991 in S4HANA
Summary
by MITRE • 06/10/2025
SAP S/4HANA (Bank Account Application) does not perform necessary authorization checks. This allows an authenticated 'approver' user to delete attachment from bank account application of other user, leading to a low impact on integrity, with no impact on the confidentiality of the data or the availability of the application.
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Analysis
by VulDB Data Team • 06/10/2025
SAP S/4HANA Bank Account Application contains a critical authorization flaw that undermines the system's integrity controls. This vulnerability affects the application's ability to enforce proper access controls when processing bank account related documents. The flaw manifests when an authenticated user with approver privileges attempts to delete attachments from bank account applications that belong to other users within the system. The absence of proper authorization checks means that users can bypass the intended access restrictions and manipulate data belonging to different users, creating an integrity risk within the financial application environment.
The technical nature of this vulnerability stems from insufficient authorization validation mechanisms within the bank account application module. When a user attempts to delete an attachment, the system should verify that the requesting user has appropriate permissions not only for the operation itself but also for the specific resource being accessed. In this case, the system fails to validate that the approver user has the authority to modify or delete attachments belonging to other users. This authorization bypass allows malicious or unauthorized actions that violate the principle of least privilege and proper access control enforcement. The vulnerability aligns with CWE-285, which addresses improper authorization in software systems where access controls are inadequately enforced.
The operational impact of this vulnerability is significant despite its classification as low impact on integrity. An authenticated approver user can disrupt the workflow of other users by deleting critical attachments from bank account applications, potentially causing data loss or workflow interruptions. This capability undermines the trust in the system's data integrity controls and can lead to compliance issues within financial environments. The vulnerability specifically affects the bank account application module within SAP S/4HANA, which is a core component of financial management processes. The absence of proper authorization checks creates opportunities for both accidental and intentional data manipulation that could affect financial reporting and audit trails.
From a security perspective, this vulnerability represents a failure in implementing proper access control mechanisms that should be enforced at multiple levels within enterprise applications. The flaw enables a user to perform operations on resources they should not have access to, which violates fundamental security principles. Organizations using SAP S/4HANA should consider this vulnerability in their risk assessment frameworks and evaluate how it might interact with other security controls within their environment. The impact extends beyond simple data deletion, as removing attachments could compromise the completeness of financial records and audit capabilities. This vulnerability may also enable attackers to disrupt business processes or create false audit trails, particularly in regulated environments where proper documentation and data integrity are critical requirements.
Mitigation strategies should focus on implementing proper authorization controls and access validation mechanisms within the bank account application module. SAP should provide security patches or updates that enforce proper authorization checks when users attempt to delete attachments from bank account applications. Organizations should also consider implementing additional monitoring and alerting mechanisms to detect unauthorized access attempts. The solution should align with ATT&CK framework techniques related to privilege escalation and unauthorized access, ensuring that access controls are properly enforced. Regular security assessments and access reviews should be conducted to identify similar authorization gaps within the SAP S/4HANA environment. Additionally, organizations should implement proper user training to ensure that approver users understand their limitations and the importance of maintaining proper access controls within financial applications.