External risk intelligence

Yonyou U8 CRM Unauthenticated SQL Injection with OS Command Execution

CVE advisorySeverity: CRITICAL (CVSS 9.3)

CVE-2024-58385

The vulnerability resides in a web-based configuration endpoint of a CRM application. CRM systems are commonly deployed as internet-facing web applications to support remote access and partner integration, making the web interface and its associated endpoints typically reachable from the public internet.

SQL Injection

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

This advisory highlights a critical vulnerability in Yonyou U8 CRM, specifically an unauthenticated SQL injection flaw in a configuration endpoint that could allow attackers to execute arbitrary commands. The main concern is to confirm if this specific technology is in use and potentially exposed.

Unauthenticated CRM flaw allows attackers remote command execution.
Leadership should remember this potential for unauthorized system control.
Confirm Yonyou U8 CRM relevance and exposure within our environment.

Attack Path

How an attacker could exploit the issue

An attacker could begin by accessing the vulnerable `fillbacksettingedit.php` endpoint of Yonyou U8 CRM. This endpoint is exposed externally and requires no authentication, allowing an attacker to directly submit malicious input to the `id` parameter. Because this parameter is not properly sanitized, it can be manipulated to inject SQL commands, which could then lead to the execution of arbitrary operating system commands if specific Microsoft SQL Server configurations are in place.

Unauthenticated access to a web endpoint.
Injecting unescaped input into the `id` parameter.
Potential for arbitrary OS command execution.

Live Threat

Current exploitation, exposure, and threat context

SQL injection in the Yonyou U8 CRM's `fillbacksettingedit.php` endpoint could allow unauthenticated attackers to execute arbitrary SQL commands. When Microsoft SQL Server is used with `xp_cmdshell` enabled, this could lead to the execution of operating system commands and the deployment of web backdoors.

System configuration data may be exposed.
Unauthenticated SQL commands could be injected.
Arbitrary OS commands could be executed.

Operational Fix

Recommended remediation, mitigation, and detection steps

The Yonyou U8 CRM's SQL injection vulnerability requires immediate attention from teams managing the application and its underlying infrastructure. The first step is to locate all instances of the affected CRM, determine their exposure and criticality, identify the responsible system owners, and then plan remediation efforts based on the assessed risk.

Application owners to identify instances.
Verify external reachability and business impact.
Plan remediation based on risk assessment.

Supplementary metadata

CVSS vector

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Frequently asked questions

What is Yonyou U8 CRM?

Yonyou U8 CRM is a customer relationship management software platform used by businesses to track sales, manage customer interactions, and store sensitive business data. It typically serves as a centralized hub for enterprise operations, often integrating with database backends like Microsoft SQL Server to process and organize information across an organization.

What does this CVE mean regarding SQL injection?

This vulnerability is classified as CWE-89, or Improper Neutralization of Special Elements used in an SQL Command. In simple terms, the application fails to properly clean user-provided input before using it in a database query. For CVE-2024-58385, this allows an attacker to insert their own SQL commands, which the database then executes as if they were legitimate instructions from the software.

How does an attacker trigger this vulnerability?

An attacker triggers the flaw by sending a specially crafted web request to the `fillbacksettingedit.php` file. By setting the `DontCheckLogin` parameter to 1, they bypass the system's authentication requirement. They then inject malicious code into the `id` parameter. Note that simply visiting the page normally without these specific, malicious parameters does not trigger the vulnerability.

Is my organization at risk for this CVE?

Halo Surface Signal indicates that because this vulnerability exists within a web-based CRM configuration endpoint, it is highly likely to be reachable if your Yonyou U8 CRM instance is hosted on the public internet. Organizations running this software that are directly accessible from the outside world face the highest risk, as attackers do not need valid credentials to attempt this exploit.

What is the first step to address this issue?

Your initial priority is to perform an inventory of your internal systems to locate all active installations of Yonyou U8 CRM. Once identified, work with the relevant system owners to assess whether these instances are exposed to the public internet and confirm the database configurations in use, particularly regarding Microsoft SQL Server settings that could elevate the impact of this flaw.

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.