CVE-2018-2436 in R3 Enterprise Retail
Summary
by MITRE
Executing transaction WRCK in SAP R/3 Enterprise Retail (EHP6) does not perform necessary authorization checks for an authenticated user, resulting in escalation of privileges.
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Analysis
by VulDB Data Team • 03/02/2020
The vulnerability identified as CVE-2018-2436 resides within SAP R/3 Enterprise Retail systems running EHP6 version, specifically manifesting in the transaction WRCK which governs retail inventory and pricing configurations. This flaw represents a critical authorization bypass issue that allows authenticated users to escalate their privileges without proper verification mechanisms. The vulnerability stems from insufficient access control validation within the transaction processing framework, creating a pathway for unauthorized privilege elevation that directly contravenes fundamental security principles of least privilege and principle of least authorization.
The technical implementation of this vulnerability occurs at the transaction level where the WRCK process fails to validate user permissions against required authorization objects before executing sensitive operations. This authorization gap enables malicious actors who have gained initial access to the system to exploit this weakness and assume elevated roles within the retail environment. The flaw operates under CWE-284 which classifies it as an improper access control vulnerability, specifically targeting authorization mechanisms that should enforce proper user role validation. The vulnerability's impact is amplified by the fact that it affects a core retail transaction that likely handles critical business operations including inventory management, pricing adjustments, and sales configuration data.
From an operational perspective, this vulnerability creates significant risk for organizations utilizing SAP R/3 Enterprise Retail systems, as it allows for unauthorized modification of retail configurations that could result in financial loss, data manipulation, and competitive disadvantage. The privilege escalation capability means that an attacker could potentially access sensitive retail pricing information, manipulate inventory records, or alter sales configurations that directly impact business operations. This vulnerability aligns with ATT&CK technique T1078 which covers valid accounts and privilege escalation techniques, where attackers leverage legitimate access to perform unauthorized activities. The impact extends beyond immediate system compromise to potential downstream effects including data integrity breaches, regulatory compliance violations, and operational disruption.
Organizations should implement immediate mitigations including applying the relevant SAP security notes and patches released to address this vulnerability, implementing additional monitoring of transaction WRCK usage, and conducting comprehensive access control reviews to ensure proper user role assignments. The remediation process should also include establishing network segmentation to limit access to critical retail transactions, implementing privileged access management controls, and enhancing audit logging for all retail transaction activities. Additionally, regular security assessments should be conducted to identify similar authorization gaps in other SAP transactions and business processes, as this vulnerability demonstrates the importance of thorough authorization validation across all system components. The mitigation strategy must align with industry best practices for SAP security management and should incorporate both preventive controls and detective measures to protect against future exploitation attempts.