Advisory
On 11.11.2014 a security relevant correction has been released by SAP SE. The manufacturer resolves an issue within ABAP.
SAP Note 2032723 addresses "Switchable authorization checks for RFC in SRM" to prevent missing authorization check / improper authorization check with a medium risk for exploitation.
A workaround does exist, according to SAP Security Advisory team. It is advisable to implement the correction as project***, the team suggests.
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 specification
This note has been re-released with updated 'Correction instruction' information. An authenticated user may call certain function modules from Supplier Relationship Management without being properly authorized, resulting in an escalation of privileges.Solution
Additional authorization checks are introduced via the Switchable Authorization Framework (SACF) for Scenarios BBP_VENDOR_GET ( Scenario for Vendors & Plants), PSM_MASTERDATA (Public Sector Management: Master Data Scenario RFC) and FI_DOC_READ (Display of an Accounting Document RFC) Circumstances exist that prevent the timely installation of a patch provided by the manufacturer. In such cases, you may consider applying the suggested workaround as a temporary or compensating mitigation: "Maintain strict governance on object S_RFC (no "*" in function groups or names) in all user roles. Alternatively, implement UCON and switch off remote capability of unused function modules.".
Affected System
The advisory 2032723 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_APPL 600 18
- SAP_APPL 602 18
- SAP_APPL 603 18
- SAP_APPL 604 18
- SAP_APPL 605 19
- SAP_APPL 606 18
- SAP_APPL 616 14
- SAP_APPL 617 15
