Advisory
A note with CVSS 7.6 for component BC-ABA-SC was released by SAP on 09.06.2020. The correction/advisory 2912939 was described with "[CVE-2020-6275] Server Side Request Forgery vulnerability in SAP NetWeaver AS ABAP" and affects the system type ABAP.
A workaround exists, according to SAP Security Advisory team. It is advisable to implement the correction as part of maintenance.
The vulnerability addressed is cross-site request forgery (xsrf) 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 ‘Solution’ information. A Server Side Request Forgery vulnerability in the AS ABAP import/export functionality for batch input allows an autenticated attacker to direct requests to an malicious webserver resulting in the compromise of used NTLM credentials.Solution
The solution restricts import and export functionality to logical path and file names, only. Although an alternative solution exists, it is advisable to apply the correction! This is the workaround, which was suggested by the SAP security experts: "Strictly control authorizations for S_BDC_MONI ".
Affected System
The advisory 2912939 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_BASIS 700-702 66
- SAP_BASIS 710-711 21
- SAP_BASIS 730 34
- SAP_BASIS 731 78
- SAP_BASIS 740 81
- SAP_BASIS 750-754 11
- 9.9 [CVE-2021-33690] Server Side Request Forgery vulnerability in SAP NetWeaver Development Infrastructure (Component Build Service)
- 6.3 Cross-Site Request Forgery (CSRF) vulnerability in multiple SAP Sybase products
- 5.5 Cross-Site Request Forgery (CSRF) vulnerability in Cash Management
- 5.4 Cross-Site Request Forgery (CSRF) vulnerability in S/4HANA Finance for advanced payment management
- 5.4 Cross-Site Request Forgery (CSRF) vulnerability in S/4HANA OP2020, OP1909 in Import Financial Plan Data
