Advisory
A note with CVSS 9.9 for component BW-WHM-DST-DBC was released by SAP on 12.01.2021. The correction/advisory 2986980 was described with "[CVE-2021-21465] Multiple vulnerabilities in SAP Business Warehouse (Database Interface)" and affects the system type ABAP.
A workaround exists, according to SAP Security Advisory team. It is advisable to implement the correction as monthly patch process .
The vulnerability addressed is sql injection (read/write) missing authentication 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 specification
This note has been re-released with updated 'validity', and ‘Support Packages & Patches’ information - This note addresses two vulnerabilities in SAP Business Warehouses' database interface. The Interface allows an authenticated attacker to gain access to all database tabled due to a missing authentication check and allows SQL injection resulting in the full compromise of the SAP System.Solution
The issues have been fixed by disabling the affected function module as they were no longer used. Although an alternative solution exists, it is advisable to apply the correction! This is the workaround, which was suggested by the SAP security experts: "As a workaround the function module mentioned in the correction instruction could be deactivated by deleting or commenting out the code as a modification (RSDL_DB_GET_DATA_BWS)".
Affected System
The advisory 2986980 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
- SAP_BW 700-702 7
- SAP_BW 710-711 2
- SAP_BW 730 7
- SAP_BW 731 10
- SAP_BW 740 12
- SAP_BW 750-755 6
- SAP_BW 782 4
- SAP_BW_VIRTUAL_COMP 701 3
