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 3434666 was released on 14.05.2024 and deals with "[Multiple CVEs] Missing Authorization Checks in SAP S/4 HANA (Manage Bank Statement Reprocessing Rules)" within ABAP. We advice you to follow the instructions, to resolve missing authorization check with a medium potential for exploitation in component FI-FIO-AR-PAY.

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 specification

This note addresses two different CVEs in the SAP S4Hana App Manage Bank Statements. In both CVEs, missing authorization checks in Manage Bank Statement ReProcessing Rules permit an authenticated attacker, without the necessary authorization, to attain excess privileges 1. As the necessary authorization checks are not performed, an unauthorized attacker can delete rules of other users, thereby affecting the integrity of the application. However, confidentiality and availability are not affected. 2. Due to this vulnerability, an unauthorized attacker can enable/disable the sharing rule of other users, thereby affecting the integrity of the application as well. Confidentiality and availability are not affected.

Solution

Both vulnerabilities had been solved in Manage Bank Statement Reprocessing Rules by performing necessary authorization checks which prevent attackers from gaining unapproved privileges

Affected System

The advisory 3434666 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

S4CORE 105 ³⁵
S4CORE 106 ²⁵
S4CORE 107 ¹⁹
S4CORE 108 ¹³
SAPSCORE 131

Releated advisories

Disclaimer

SecurityBridge takes the security of SAP products very seriously. We very much encourage the responsible disclosure of security vulnerabilities. If you have detected a vulnerability concerning 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 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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Notifications

Affected system ABAP

CVSS 4.3

Component FI-FIO-AR-PAY

Patch Day2024-05

Released on2024/05/14

SAP Note 3434666

Workaround No

Advisory

Risk specification

Solution

Affected System

Disclaimer

_{Affected system}
ABAP

_CVSS
4.3

_Component
FI-FIO-AR-PAY

_{Patch Day}
2024-05

_{Released
on}
2024/05/14

_{SAP Note}
3434666

_Workaround
No