A note with CVSS 6.3 for component FIN-FSCM-IHC was released by SAP on 12.01.2021. The correction/advisory 2743329 was described with "Switchable authorization checks for RFC module in In-House-Cash." and affects the system type ABAP.
A workaround exists, according to SAP Security Advisory team. It is advisable to implement the correction as project***.
The vulnerability addressed is missing authorization check within ABAP.
Missing authority checks are still the most common security defect related to authorizations in custom code. Since SAP uses an explicit authorization model, an authority checks must be coded in order to be executed. If an explicit check is not coded, all users have access. This type of vulnerability not only exists in SAP standard it also exists in customer coding. Check your custom developments for vulnerabilities that pose a risk to your systems. SecurityBridge helps detect code vulnerabilities before they are implemented in production.
Risk specificationThis note has been re-released with the updated 'validity' information. - An authenticated user may call certain function modules from SAP Deposits Management without being properly authorized, resulting in an escalation of privileges.
Additional authorization checks are introduced via the Switchable Authorization Framework (SACF) for new authorization object S_RFC for Scenarios IHC_PN (In House Cash Payment Order and Item actions) and IHC_PRQ (In House Cash Payment Request actions and Document Reversal) Although an alternative solution exists, it is advisable to apply the correction! This is the workaround, which was suggested by the SAP security experts: "Maintain strict governance on object S_RFC (no "*" in function groups or names) in all user roles. Alternatively, implement UCON and switch off remote capability of unused function modules.".
The advisory 2743329 describes a problem within an ABAP based systems of a specific version. Affected versions are described below. ABAP software is deployed in various software components and is widely used within the SAP product portfolio.
SAP NetWeaver Application Server (formally known as SAP Web Application Server) is a building block of SAP NetWeaver. It is the foundation for most software products developed by SAP SE. SAP NetWeaver systems exist with Java and/or ABAP stacks. The advisory could be relevant for single and dual-stack ABAP installations.
The advisory is valid for
- 10.0 [Multiple CVE IDs] Missing Authentication Check in SAP Solution Manager (JAVA stack)
- 9.6 [CVE-2020-6320] Improper Access Control in SAP Marketing (Mobile Channel Servlet)
- 8.5 [CVE-2020-26837] Multiple Vulnerabilities in SAP Solution Manager 7.2 (User Experience Monitoring)
- 8.1 [CVE-2020-6279] Missing Authorization Check in SAP SuccessFactors Recruiting
- 7.6 [CVE-2020-26832] Missing Authorization check in SAP NetWeaver AS ABAP and SAP S4 HANA (SAP Landscape Transformation)