SAP takes the security of its vast product portfolio very seriously and thus releases security fixes for
vulnerabilities reported by external researchers and their customers every second Tuesday of the month.
SAP Note 2971954
was released on
10.11.2020 and deals with
"[CVE-2020-26818] Multiple vulnerabilities in SAP NetWeaver AS ABAP (Web Dynpro)" within ABAP.
We advice you to follow the instructions, to resolve
information disclosuremissing authorization check
medium potential for exploitation
in component BW-WHM-DST-ARC.
According to SAP Security Advisory team a workaround does not exist. It is advisable to implement the correction as monthly patch process .
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 contains two different security vulnerabilities. SAP NetWeaver AS ABAP allows an authenticated user access to WebDynpro components, which reveals sensitive system information that would otherwise be restricted to highly privileged users and allows an authenticated user access to WebDynpro components, that allows them to read and modify database logfiles.
After patch installation, the already existing authorization object S_RZL_ADM is checked for ACTVT 01,03 or 07.
The advisory 2971954 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