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 specificationSAP Business One allows an unauthenticated attacker to gain read and write access to the SMB shared folder due to missing authentication and authorization checks.
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
- 10.0 [CVE-2021-37535] Missing Authorization check in SAP NetWeaver Application Server for Java (JMS Connector Service)
- 10.0 [Multiple CVE IDs] Missing Authentication Check in SAP Solution Manager (JAVA stack)
- 9.8 [CVE-2023-40309] Missing Authorization check in SAP CommonCryptoLib
- 9.6 [CVE-2021-21481] Missing Authorization Check in SAP NetWeaver AS JAVA (MigrationService)
- 9.6 [CVE-2020-6320] Improper Access Control in SAP Marketing (Mobile Channel Servlet)