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 2963137
was released on
13.10.2020 and deals with
"[CVE-2020-6371] Information disclosure in SAP NetWeaver AS ABAP via the POWL Test Feeder endpoint" within ABAP.
We advice you to follow the instructions, to resolve
medium potential for exploitation
in component BC-MUS-POW.
According to SAP Security Advisory team a workaround exists. 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
vulnerabilities before they are implemented in production.
Information disclosure is when an application fails to properly protect sensitive and confidential information from
parties that are not supposed to have access to the subject matter in normal circumstances.
Carefully review every information disclosure vulnerablity in regards to disclosure obligations post-GDPR for ‘Personal data’ under the Data Protection Act 2018.
Risk specificationUnder certain conditions, attackers can access restricted information in SAP NetWeaver AS ABAP via the POWL Test Feeder endpoint. Attackers may gain access to the list of user accounts and personal user information via the Personal Object Worklist.
The test application with the technical name POWL_TEST_FEEDER was created for internal testing. The Web Dynpro application contains the field USER, which was removed from this test application. After the installation of the patch, the user details cannot be accessed through this application. Alternativly, the consulting team has proposed the following: "In case the test application is not in use, you can consider the deactivation of Web Dynpro application named POWL_TEST_FEEDER via SICF transaction. ". 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 4.3 score.
The advisory 2963137 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
- 9.0 [CVE-2020-6252] Information Disclosure in SAP Adaptive Server Enterprise (Cockpit)
- 8.9 Information Disclosure in Central Order
- 8.6 [CVE-2020-6264] Information Disclosure in SAP Commerce
- 7.5 [CVE-2020-6237] Information Disclosure in SAP Business Objects Business Intelligence Platform (dswsbobje Web Application)
- 6.8 [CVE-2020-6250] Information Disclosure in SAP Adaptive Server Enterprise