Advisory
On 09.07.2024 a security relevant correction has been released by SAP SE. The manufacturer resolves an issue within ABAP.
SAP Note 3483993 addresses "[CVE-2024-34689] Prerequisite for Security Note 3458789" to prevent server-side request forgery (ssrf) with a medium risk for exploitation.
A workaround does not exist, according to SAP Security Advisory team. It is advisable to implement the correction as monthly patch process, 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
This note concerns a server-side request forgery vulnerability in SAP Business Workflow (WebFlow Services), which has been split into 3 notes. 3483993 is a prerequisite note for note 3458789 that implements an allowlist for WebFlow Services callback URLs. Note 3485805 then explains how to activate and configure the allowlist.Solution
This note contains a report that must be run as a prerequisite for implementing note 3458789 via SNOTE, which contains the actual fix for the vulnerability via an allowlist. You do not need this note if you implement the solution via a support package update.
Affected System
The advisory 3483993 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
- SAP_BASIS 700-702 66
- SAP_BASIS 731 78
- SAP_BASIS 740 81
- SAP_BASIS 750-758 16
- 6.5 [CVE-2023-42477] Server-Side Request Forgery in SAP NetWeaver AS Java (GRMG Heartbeat application)
- 5.3 [CVE-2024-27898] Server-Side Request Forgery in SAP NetWeaver (tc~esi~esp~grmg~wshealthcheck~ear)
- 5.0 [CVE-2024-34689] Allowlisting of callback-URLs in SAP Business Workflow (WebFlow Services)
- 5.0 [CVE-2024-34689] Server-Side Request Forgery in SAP Business Workflow (WebFlow Services)
