External risk intelligence

Fumasoft Fumeng Cloud SQL Injection via AjaxMethod.ashx

CVE advisorySeverity: CRITICAL (CVSS 9.3)

CVE-2023-54400

The vulnerability exists in a web-accessible endpoint (AjaxMethod.ashx) of a cloud/web application. Because it allows unauthenticated remote interaction with the backend database, the vulnerable component is designed to be reachable via public-facing web services in standard deployments.

SQL Injection

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

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical vulnerability has been identified in Fumasoft Fumeng Cloud, specifically within the AjaxMethod.ashx endpoint. This issue allows unauthenticated remote attackers to inject malicious SQL code, potentially leading to the disclosure and modification of sensitive database contents, and even further compromise of the underlying server. The exploitation of this vulnerability has been observed in the wild.

  • Unauthenticated attackers can inject malicious code into the database.
  • This could expose or alter sensitive company information.
  • Confirm relevance and assess potential exposure to sensitive data.

Attack Path

How an attacker could exploit the issue

Attackers can target the Fumeng Cloud's AjaxMethod.ashx endpoint to inject malicious SQL commands through the Name parameter. This occurs without requiring any authentication, allowing remote attackers to potentially access, alter, or delete sensitive database information. Exploiting this vulnerability could lead to a broader compromise of the affected server.

  • Unauthenticated remote access to web endpoint.
  • SQL injection via the 'Name' parameter.
  • Database compromise and potential server takeover.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow attackers to inject arbitrary SQL commands into the Fumeng Cloud application. When supported by the advisory's conditions, this could lead to the disclosure, modification, or extraction of database contents, potentially compromising the underlying server.

  • Database contents at risk.
  • SQL injection via Name parameter.
  • Potential server compromise.

Operational Fix

Recommended remediation, mitigation, and detection steps

The Fumasoft Fumeng Cloud vulnerability requires immediate attention from teams managing web applications and their backend databases. The first practical step is to identify all instances of Fumeng Cloud within your environment, assess their exposure and business criticality, and determine the accountable owner for remediation. Given the potential for data extraction, disclosure, and modification, a prompt risk-based response is necessary.

  • Application owners and database administrators must coordinate.
  • Verify external accessibility of the affected endpoint.
  • Plan remediation based on confirmed risk exposure.

Supplementary metadata

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.

Frequently asked questions

What is Fumasoft Fumeng Cloud used for?

Fumasoft Fumeng Cloud is a web-based application platform designed to manage organizational data and cloud-hosted services. It typically functions as a centralized hub for managing business records, relying on a Microsoft SQL Server backend to store and retrieve critical operational information.

What does CWE-89 mean for CVE-2023-54400?

CWE-89 identifies the vulnerability as Improper Neutralization of Special Elements used in an SQL Command, commonly known as SQL Injection. In the context of this CVE, it means the application fails to properly sanitize user-provided input before including it in a database query, allowing an attacker to manipulate the intended command.

How does an attacker trigger this SQL injection?

An attacker triggers this by sending a specially crafted request to the AjaxMethod.ashx endpoint, specifically manipulating the 'Name' parameter within the 'getEmpByname' action. No authentication is required to initiate this request. Simply navigating the site or using legitimate features will not trigger the vulnerability; it requires a direct, malicious injection attempt.

Do I need to worry if my instance is not on the internet?

Halo Surface Signal indicates that this endpoint is designed for web accessibility, making internet-facing instances highly accessible to attackers. If your instance is internal, the risk remains, though the pool of potential attackers is restricted to those already within your network perimeter.

How should I respond to this Fumeng Cloud threat?

Start by auditing your environment to locate all running instances of Fumasoft Fumeng Cloud. Coordinate with application owners to assess the business impact of these specific servers. Verify whether the vulnerable AjaxMethod.ashx endpoint is accessible from untrusted networks and prioritize securing those instances immediately to prevent unauthorized database access.

References