CVE-2025-3545: Critical Command Injection Vulnerability in H3C Magic Series Products

Overview

A critical vulnerability has been discovered in the H3C Magic series of products, specifically NX15, NX30 Pro, NX400, R3010, and BE18000, up to version V100R014. This vulnerability is a serious concern for network administrators and cybersecurity professionals alike, as it allows for command injection via HTTP POST request manipulation. It is especially pertinent for organizations that use the affected H3C Magic devices within their local networks, where the vulnerability could be potentially exploited.

Vulnerability Summary

CVE ID: CVE-2025-3545
Severity: Critical (CVSS: 8.0)
Attack Vector: Local Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

H3C Magic NX15 | Up to V100R014
H3C Magic NX30 Pro | Up to V100R014
H3C Magic NX400 | Up to V100R014
H3C Magic R3010 | Up to V100R014
H3C Magic BE18000 | Up to V100R014

How the Exploit Works

The vulnerability lies in the function FCGI_CheckStringIfContainsSemicolon of the file /api/wizard/setLanguage of the component HTTP POST Request Handler. An attacker can exploit this vulnerability by manipulating the HTTP POST request to inject malicious commands. These commands are subsequently executed on the target system, potentially leading to system compromise or data leakage.

Conceptual Example Code

Here is a conceptual example of how an attacker might exploit this vulnerability using a HTTP POST request:

POST /api/wizard/setLanguage HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
language=english; rm -rf /;  #This is a dangerous command that deletes all files in the system.

In this fictitious example, the attacker appends a semicolon (;) followed by a malicious command (`rm -rf /`) to the `language` parameter. The semicolon allows for command chaining in many command-line interpreters, and the `rm -rf /` command is a destructive operation that deletes all files in the system.

Mitigation

The best course of action is to apply the patch provided by the vendor. As a temporary fix, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) could be used to block or alert on suspicious HTTP POST requests to `/api/wizard/setLanguage` that contain a semicolon (;) in the request body. However, this is only a stop-gap measure and the vulnerability should be properly patched as soon as possible.