Medium Severity
Affected system
ABAP

CVSS
6.5

Component
FS-BA-PM-SFA
Patchday
2020-09
Released on
2020/09/08
SAP Note
2951325
Workaround
No
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Advisory

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 2951325 was released on 08.09.2020 and deals with "[CVE-2020-6311] Improper Authorization Checks in Banking services from SAP Bank Analyzer and SAP S/4HANA Financial Products" within ABAP. We advice you to follow the instructions, to resolve missing authorization check with a medium potential for exploitation in component FS-BA-PM-SFA.

According to SAP Security Advisory team a workaround does not exist. It is advisable to implement the correction as project.

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

The banking services from SAP Bank Analyzer and SAP S/4HANA Financial Products do not correctly perform necessary authorization checks for an authenticated user, which may cause a system administrator to create incorrect authorization proposals on certain fields.

Solution

With the installation of the patch, the authorization object F_BABR_BAS is extended with a new authorization activity '01'. The problematic code will be updated to properly enforce the authorization checks.

Affected System

The advisory 2951325 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

ABEX takes the security of SAP products very seriously. We very much encourage the responsible disclosure of security vulnerabilities. If you have detected a vulnerability in one of the SAP software products – either in the latest or in a former product version follow the guidelines and processes in accordance with the SAP portal page “Report a Security Vulnerability to SAP”.

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

There is no disclosure of zero-day vulnerabilities. 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, ABEX only discloses issues where the fixing security note has been released at least three months ago. 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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