A note with CVSS 3.4 for component SV-SMG-DIA-APP-TA was released by SAP on 08.12.2020. The correction/advisory 2938650 was described with "[CVE-2020-26836] Open Redirect in SAP Solution Manager (Trace Analysis)" and affects the system type ABAP.
A workaround does not exist, according to SAP Security Advisory team. It is advisable to implement the correction as part of maintenance.
The vulnerability addressed is url redirection vulnerability 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 specificationAn attacker that is able to run a webserver on the same hostname as the Solution Manager but on a different port, could steal user creadentials or cookies using an open ridirect vulnerability in an application URL.
The application no longer redirects to unknown url's and only sends requests to URL's that belong to the Solution Manager.
The advisory 2938650 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
- ST 720 3
- 6.1 [CVE-2021-33707] URL Redirection vulnerability in SAP NetWeaver (Knowledge Management)
- 6.1 [CVE-2022-41207] URL Redirection vulnerability in SAP Biller Direct
- 6.1 [CVE-2022-41275] Offener Redirect in SAP Solutions Manager (Enterprise Search)
- 6.1 Multiple Vulnerabilities in URI.js bundled with SAPUI5
- 5.4 [CVE-2020-6266] URL redirection in SAP Fiori for SAP S/4HANA