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 2665387
was released on
12.01.2021 and deals with
"Cross-Site Request Forgery (CSRF) vulnerability in Cash Management" within ABAP.
We advice you to follow the instructions, to resolve
cross-site request forgery (xsrf)
medium potential for exploitation
in component FIN-FIO-CLM.
According to SAP Security Advisory team a workaround exists. It is advisable to implement the correction as part of maintenance.
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 specificationManage banks allows an attacker to trick an authenticated user to send unintended request to the web server.
Fiori F1574 (Manage Banks) has been updated to POST request Alternativly, the consulting team has proposed the following: "Cross-site scripting/request forgery filter engine on IDS/IPS/firewall systems. ". The suggestion may be considered, as a workaround or compensating mitigation. We recommend installing/applying the correction wherever possible and as soon as possible. Base your decision on whether or not to apply the patch on your companies and systems risk perspective and consider the provided CVSS 5.5 score.
The advisory 2665387 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
- S4CORE 102 33
- 9.9 [CVE-2021-33690] Server Side Request Forgery vulnerability in SAP NetWeaver Development Infrastructure (Component Build Service)
- 7.6 [CVE-2020-6275] Server Side Request Forgery vulnerability in SAP NetWeaver AS ABAP
- 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
- 5.4 Cross-Site Request Forgery (CSRF) vulnerability for S/4HANA OP2020, OP1909 in Import Financial Plan Data