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 3002517
was released on
08.06.2021 and deals with
"[CVE-2021-21473] Missing Authorization check in SAP NetWeaver AS ABAP and ABAP Platform" within ABAP.
We advice you to follow the instructions, to resolve
missing authorization check
medium potential for exploitation
in component BC-SRV-RM.
According to SAP Security Advisory team a workaround does not exist. 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 detect code vulnerabilities before they are implemented in production.
Risk specificationThis note has been re-released with updated 'Correction instruction' information. SAP NetWeaver AS ABAP and ABAP Platform allow a low privileged attacker to execute reports by using a remote enabled function (RFC) module over the network.
Function SRM_RFC_SUBMIT_REPORT has been extended to validate the authorization of an authenticated user. The RFC call is restricted to RFC within the same system, client, and user. The authorization checks have been added for the authorization objects S_RFC, S_PROGNAM, or S_PROGRAM.
The advisory 3002517 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 25
- SAP_BASIS 710-711 13
- SAP_BASIS 730 28
- SAP_BASIS 731 33
- SAP_BASIS 740 34
- SAP_BASIS 750-755 11
- 10.0 [Multiple CVE IDs] Missing Authentication Check in SAP Solution Manager (JAVA stack)
- 10.0 [CVE-2021-37535] Missing Authorization check in SAP NetWeaver Application Server for Java (JMS Connector Service)
- 9.6 [CVE-2021-21481] Missing Authorization Check in SAP NetWeaver AS JAVA (MigrationService)
- 9.6 [CVE-2020-6320] Improper Access Control in SAP Marketing (Mobile Channel Servlet)
- 9.6 [CVE-2021-40501] Missing Authorization check in ABAP Platform Kernel