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 3044754
was released on
13.07.2021 and deals with
"[CVE-2021-33677] Information Disclosure in SAP NetWeaver AS ABAP and ABAP Platform" within ABAP.
We advice you to follow the instructions, to resolve
medium potential for exploitation
in component BC-MID-RFC-BG.
According to SAP Security Advisory team a workaround does not exist. 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
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 specificationAn unauthenticated attacker is able to call exposed function modules which should not be called outside of an ABAP system leading to information disclosure.
The RFC scope of the affected function modules is restricted and the error information in BGRFC_PREPARE_EXT_DEBUGGING is reduced.
The advisory 3044754 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 19
- SAP_BASIS 730 22
- SAP_BASIS 731 27
- SAP_BASIS 740 26
- SAP_BASIS 750-755 10
- SAP_BASIS 784
- SAP_BASIS 804 4
- SAP_BASIS DEV 2
- 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