SAP PO – User enumeration in GPWorkItemProvider
Impact on Business
An unauthenticated remote attacker can enumerate valid usernames on the target SAP system. This has a low impact on the confidentiality of the system, but it allows an attacker to gather information about existing users and potentially identify configured services or applications, which could be used to plan further attacks.
Vulnerability Details
A specific SOAP service within SAP Process Orchestration allows an unauthenticated remote attacker to determine whether a specific user exists on the system. By observing the differences in the application’s responses, an attacker can systematically enumerate valid usernames. This observable response discrepancy can lead to information disclosure regarding the system’s users and configuration.
Solution
SAP has released SAP Note 3425571 which provides patched versions of the affected components.
The patches can be downloaded from https://me.sap.com/notes/3425571.
Onapsis strongly recommends SAP customers to download the related security fixes and apply them to the affected components in order to reduce business risks.
Report Timeline
- 01/08/2024: Onapsis reports vulnerability to SAP
- 06/11/2024: SAP issues the patch
References
Advisory Information
- Public Release Date: 09/17/2026
- Security Advisory ID: ONAPSIS-2026-0093
- Researcher(s): Yvan Genuer
Vulnerability Information
- Vendor: SAP
- Affected Components: SAP Process Orchestration (GP-CORE) (Check SAP Note 3425571 for detailed information on affected releases)
- Vulnerability Class: CWE-204: Observable Response Discrepancy
- CVSS v3 score: 5.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
- Risk Level: Medium
- Assigned CVE: CVE-2024-28164
- Vendor patch Information: SAP Security NOTE 3425571
Affected Components Description
- SAP Process Orchestration (PO) 7.50
About our Research Labs
Onapsis Research Labs provides the industry analysis of key security issues that impact mission-critical systems and applications. Delivering frequent and timely security and compliance advisories with associated risk levels, Onapsis Research Labs combine in-depth knowledge and experience to deliver technical and business-context with sound security judgment to the broader information security community.
Find all reported vulnerabilities at: https://github.com/Onapsis/vulnerability_advisories
This advisory is licensed under a Creative Commons 4.0 BY-ND International License