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 3048657
was released on
13.07.2021 and deals with
"[CVE-2021-33678] Code Injection vulnerability in SAP NetWeaver AS ABAP (Reconciliation Framework)" within ABAP.
We advice you to follow the instructions, to resolve
code injection denial of service (dos) information disclosure
medium potential for exploitation
in component BC-SRV-BP.
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 detect code vulnerabilities before they are implemented in production.
Risk specificationAn authenticated attacker is able to pass by malicious SQL commands by a function module of SAP NetWeaver AS ABAP (Reconciliation Framework) which can lead to the generation of malicious reports. Those reports could delete critical information or make the SAP system completely unavailable.
The affected function module now prevents malicious input from being passed to the database by the implementation of additional validation.
The advisory 3048657 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_ABA 700-702 2
- SAP_ABA 710-711 3
- SAP_ABA 730 2
- SAP_ABA 731 2
- SAP_ABA 740 3
- SAP_ABA 750-752 3
- SAP_ABA 75A-75F