Medium Severity
Affected system
ABAP
CVSS
6.3
Component
FI-CAX-FS
Patch Day
2022-02
Released on
2019/04/09
SAP Note
2531036
Workaround
Yes
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Advisory

A note with CVSS 6.3 for component FI-CAX-FS was released by SAP on 09.04.2019. The correction/advisory 2531036 was described with "Switchable Authorization checks for RFC BCA_DIM_RESET_TRIGGER_TABLE in Loans (FI-CAX-FS)" and affects the system type ABAP.

A workaround exists, according to SAP Security Advisory team. It is advisable to implement the correction as part of maintenance***.

The vulnerability addressed is missing authorization check 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 detect code vulnerabilities before they are implemented in production.

Risk specification

An authenticated user may execute certain function modules from FI-CAX-FS without having proper business authorizations assigned, as the function modules check for S_RFC only.

Solution

New switchable authorization checks for scenario FS_TB_RESET_TRIGG (Reset Trigger table) and authorization objects F_KKKO_BUK, F_KKVK_VKT, F_KKVK_BEG, F_KKKO_GSB have been implemented for the function modules.  Although an alternative solution exists, it is advisable to apply the correction! This is the workaround, which was suggested by the SAP security experts: "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 2531036 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

 

 

Disclaimer

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The advisories found within the SecurityBridge advisory are generated and continuously enriched by our Team at SecurityBridge and affiliated security consultants, partners, customers of the SecurityBridge Platform, SAP support, and advisory groups.

We do not disclose zero-day vulnerabilities unless a security patch has been made available to the public. In such case, the platform only provides details on which version or signature updates are available within the SecurityBridge platform in order to monitor or measure the vulnerability.

In accordance with SAP guidelines, SecurityBridge only discloses issues where the fixing security note has been released. The vulnerability platform makes no references to available exploits or Proof of Concepts (PoC). Advisories and vulnerabilities will always mention the fixing security note or hints to the corresponding SAP documentation.

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