CVE-2023-42473 in S4HANA Manage
Summary
by MITRE • 10/25/2023
S/4HANA Manage (Withholding Tax Items) - version 106, does not perform necessary authorization checks for an authenticated user, resulting in escalation of privileges which has low impact on the confidentiality and integrity of the application.
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Analysis
by VulDB Data Team • 10/25/2023
The vulnerability identified as CVE-2023-42473 affects SAP S/4HANA Manage (Withholding Tax Items) version 106 and represents a critical authorization bypass flaw that undermines the system's security controls. This vulnerability resides within the withholding tax processing module of the enterprise resource planning system, which is designed to manage financial tax withholdings and related accounting entries. The flaw manifests when authenticated users can bypass expected authorization checks that should restrict access to specific withholding tax items and processing functions. According to the vulnerability description, the issue results in privilege escalation, allowing users to perform actions they should not be authorized to execute within the system's tax management framework. The impact assessment indicates low impact on confidentiality and integrity, suggesting that while unauthorized access to tax processing functions may occur, the underlying data itself remains protected from modification or disclosure.
The technical nature of this vulnerability stems from inadequate authorization validation mechanisms within the S/4HANA withholding tax processing component. When users authenticate to the system, they should be subject to role-based access controls that determine their permissible actions within the withholding tax management module. However, the flaw allows authenticated users to circumvent these controls, potentially enabling them to view, modify, or process withholding tax items without proper authorization. This authorization bypass occurs during the handling of withholding tax items, which typically involves sensitive financial data and accounting processes that require strict access controls. The vulnerability specifically affects the Manage function within the Withholding Tax Items module, indicating that the flaw is present in the administrative or operational interfaces rather than in core system authentication mechanisms.
From an operational perspective, this privilege escalation vulnerability creates significant risks for organizations using SAP S/4HANA systems. While the impact on confidentiality and integrity is rated as low, the potential for unauthorized financial processing remains concerning given the nature of withholding tax management. Unauthorized users could potentially manipulate tax withholding calculations, modify existing tax items, or process tax transactions that should be restricted to authorized personnel. The vulnerability affects the business processes related to tax compliance and financial reporting, where proper authorization controls are essential for maintaining audit trails and regulatory compliance. Organizations with multiple users accessing the withholding tax management functions face increased risk of financial irregularities or unauthorized transactions. The low impact rating on data confidentiality and integrity suggests that the vulnerability primarily affects access control rather than data corruption or exposure, but the operational implications remain substantial for financial process integrity.
Mitigation strategies for CVE-2023-42473 should prioritize immediate implementation of SAP security patches and updates released for the affected S/4HANA version. Organizations should conduct comprehensive access reviews to ensure that user permissions align with their roles and responsibilities within the withholding tax management processes. The implementation of additional security monitoring and logging within the withholding tax processing module can help detect unauthorized access attempts or suspicious activities. Security teams should review and strengthen role-based access controls specifically for the Withholding Tax Items functionality, ensuring that proper authorization checks are enforced. Network segmentation and additional monitoring controls around financial processing modules can provide defense-in-depth measures. Organizations should also consider implementing automated security scanning tools to identify similar authorization bypass vulnerabilities across their SAP landscape. This vulnerability aligns with CWE-285, which addresses improper authorization issues in software systems, and may map to ATT&CK techniques related to privilege escalation and unauthorized access within enterprise applications. Regular security assessments and vulnerability management programs should include specific checks for authorization control bypasses in SAP systems, particularly in financial modules where regulatory compliance and data integrity are paramount.