On 08.12.2020 a security relevant correction has been released by SAP SE. The manufacturer resolves an issue within ABAP.
SAP Note 2993132 addresses "[CVE-2020-26832] Missing Authorization check in SAP NetWeaver AS ABAP and SAP S4 HANA (SAP Landscape Transformation)" to prevent missing authorization check with a high risk for exploitation.
A workaround does not exist, according to SAP Security Advisory team. It is advisable to implement the correction as monthly patch process , the team suggests.
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 specificationSAP Landscape Transformation allows a high privileged user to execute an RFC function module to which access should be restricted.
The affected RFC function modules have now been enforced to properly check access restrictions.
The advisory 2993132 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
- DMIS 2011_1_620 2
- DMIS 2011_1_640 2
- DMIS 2011_1_700 2
- DMIS 2011_1_710 2
- DMIS 2011_1_730 2
- DMIS 2011_1_731 2
- DMIS 2018_1_752 2
- DMIS 2020 2
- S4CORE 100 15
- S4CORE 101 21
- S4CORE 102 21
- S4CORE 103 24
- S4CORE 104 17
- S4CORE 105 3
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