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 3485805
was released on
09.07.2024 and deals with
"[CVE-2024-34689] Allowlisting of callback-URLs in SAP Business Workflow (WebFlow Services)" within ABAP.
We advice you to follow the instructions, to resolve
server-side request forgery (ssrf)
with a
medium potential for exploitation
in component BC-BMT-WFM.
According to SAP Security Advisory team a workaround does not exist. It is advisable to implement the correction as monthly patch process / part of mainenance.
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 describes how to configure the allowlisting of WebFlow Services callback URLs either after implementing notes 3483993 and 3458789 or after a support package update or after a release update. If you are using the described feature in SAP Business Workflow you need to configure the allowlist.
Affected System
The advisory 3485805 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] Prerequisite for Security Note 3458789
- 5.0 [CVE-2024-34689] Server-Side Request Forgery in SAP Business Workflow (WebFlow Services)
