External risk intelligence

YonBIP Arbitrary File Upload Leads to Code Execution.

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2023-51924

YonBIP is an enterprise management platform typically deployed as an internet-facing web application to support remote access and business operations. Its web-based nature and requirement for external connectivity to facilitate vendor and user interactions make its resource management endpoints and web interface frequently reachable from the internet, increasing the likelihood of exposure.

Unrestricted File Upload

Yonyou Yonbip

3_23.05

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical vulnerability exists in YonBIP's resource management interface, allowing unauthenticated attackers to upload malicious files and execute arbitrary code. This could potentially lead to a complete compromise of affected systems.

Malicious file uploads can lead to code execution.
Critical flaw impacts enterprise management software.
Confirm relevance and confirm exposure are key.

Attack Path

How an attacker could exploit the issue

An attacker can exploit this vulnerability by uploading a specially crafted file to the uap.framework.rc.itf.IResourceManager interface. This interface, if exposed to the internet, allows for arbitrary file uploads, which can lead to the execution of malicious code on the affected system.

No authentication or user interaction needed.
Upload a malicious file.
Execute arbitrary code.

Live Threat

Current exploitation, exposure, and threat context

A critical arbitrary file upload vulnerability in the uap.framework.rc.itf.IResourceManager interface could allow an unauthenticated attacker to execute arbitrary code by uploading a specially crafted file. This could impact the integrity and availability of the YonBIP system when exposed to the internet.

System code and services at risk.
Upload crafted file via network.
Arbitrary code execution.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability impacts the YonBIP platform, likely managed by application owners and infrastructure or platform teams responsible for enterprise resource planning systems. The initial focus should be on identifying all instances of the affected technology, assessing their exposure and criticality, and locating the accountable business or technical owner to prioritize remediation efforts.

Identify application and infrastructure owners.
Verify external reachability and business impact.
Plan remediation based on exposure and criticality.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

Free EASM Trial See How Signal Works

Frequently asked questions

What is YonBIP?

YonBIP is an enterprise management platform created by Yonyou. It functions as a digital business infrastructure, helping organizations manage core operations like finance, supply chain, and human resources in a unified environment. Because it serves as a central hub for business processes, it often hosts sensitive organizational data and manages complex workflows that require reliable, continuous uptime for users across an enterprise.

What does CVE-2023-51924 mean?

This vulnerability is classified as an Unrestricted Upload of File with Dangerous Type, or CWE-434. In plain English, the software's file management system fails to properly verify the type or content of files being uploaded. Because the system trusts these files too implicitly, an attacker can bypass security checks to upload malicious scripts, which the server then incorrectly treats as legitimate code, allowing them to run unauthorized commands.

How does an attacker trigger this vulnerability?

An attacker triggers this by interacting directly with the IResourceManager interface within the YonBIP framework to submit a specially crafted file. This action does not require the attacker to have a valid user account or perform any prior authentication. Importantly, the vulnerability is specific to this file management interface; other standard application functions that do not involve file processing are not the pathways for this specific file-upload exploit.

Why is this CVE relevant to my network?

Halo Surface Signal notes that YonBIP is typically deployed as a web application requiring connectivity to support remote business tasks. When these management interfaces are reachable from the internet, it becomes significantly easier for unauthorized parties to reach the vulnerable endpoint. If your instance is internet-facing, it is at higher risk because it bypasses the need for the attacker to be inside your corporate network to attempt the file upload.

How should I respond to this threat?

Start by identifying every instance of YonBIP running in your environment and determining which ones are accessible from the internet. Coordinate with the business or technical owners of these systems to assess their criticality. Once mapped, prioritize these systems for remediation, ensuring that any official patches or security updates from Yonyou are applied promptly to close the insecure file management interface.

References

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.