A note with CVSS 5.3 for component BC-CST-DP was released by SAP on 13.04.2021. The correction/advisory 3036679 was described with "Update 1 to Security Note 1576763: Potential information disclosure relating to usernames" 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 monthly patch process .
The vulnerability addressed is information disclosure 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
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 specificationThis SAP Note supplements the correction instructions in security note 1576763 for the release 7.30. Under certain conditions SAP Application Server ABAP allows an attacker to access information relating to usernames.
The affected function modules have been updated to prevent the information disclosure vulnerability.
The advisory 3036679 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
- 8.3 [CVE-2021-21482] Information Disclosure in SAP NetWeaver Master Data Management
- 8.2 [CVE-2021-21483] Information Disclosure in SAP Solution Manager