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CVE-2024-0294: Critical OS Command Injection Vulnerability in Totolink LR1200GB

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Overview

The cybersecurity community has recently identified a critical vulnerability (CVE-2024-0294) in Totolink’s LR1200GB 9.1.0u.6619_B20230130. The vulnerability, found in the ‘setUssd’ function of the ‘/cgi-bin/cstecgi.cgi’ file, can lead to potential system compromises or data leakage and has been classified as a critical threat. This report will delve into the details of the vulnerability, its impact, and the steps required for its mitigation.

Vulnerability Summary

CVE ID: CVE-2024-0294
Severity: Critical (CVSS: 7.3)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage

Affected Products

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Product | Affected Versions

Totolink LR1200GB | 9.1.0u.6619_B20230130

How the Exploit Works

The vulnerability resides in the ‘setUssd’ function of the ‘/cgi-bin/cstecgi.cgi’ file. An attacker can manipulate the ‘ussd’ argument to inject operating system commands. This can be done remotely, without any user interaction or privileges. Successful exploitation allows unauthorized parties to take control of the system or access sensitive data.

Conceptual Example Code

An example of how this vulnerability might be exploited is shown below. This conceptual HTTP request injects a malicious OS command via the ‘ussd’ parameter:

POST /cgi-bin/cstecgi.cgi HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
setUssd=;malicious_command

Mitigation and Vendor Response

At this time, the vendor has not responded to inquiries regarding this vulnerability. Users are highly recommended to apply the latest patches as soon as they are available. As a temporary mitigation method, users can implement a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to detect and block potential attacks exploiting this vulnerability.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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