Advisory

On 14.11.2023 a security relevant correction has been released by SAP SE. The manufacturer resolves an issue within SAP Business One.

SAP Note 3355658 addresses "[CVE-2023-31403] Improper Access Control vulnerability in SAP Business One product installation" to prevent missing authorization check with a hot news risk for exploitation.

A workaround does not exist, according to SAP Security Advisory team. It is advisable to implement the correction as part of maintenance, 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

SAP Business One allows an unauthenticated attacker to gain read and write access to the SMB shared folder due to missing authentication and authorization checks.

Solution

Code changes have been made to SMB shared folder permissions to only grant read and write access to authenticated and authorized users. Strict access controls are now enforced to ensure auditability and traceability of activities in the shared folder and also in the installation process

The advisory is valid for

B1_ON_HANA 10.0 ¹⁹

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 SAP Business One

CVSS 9.6

Component SBO-CRO-SEC

Patch Day2023-11

Released on2023/11/14

SAP Note 3355658

Workaround No

Advisory

Risk specification

Solution

Disclaimer

_{Affected system}
SAP Business One

_CVSS
9.6

_Component
SBO-CRO-SEC

_{Patch Day}
2023-11

_{Released
on}
2023/11/14

_{SAP Note}
3355658

_Workaround
No