Overview
In the ever-evolving landscape of cybersecurity, a new critical vulnerability has emerged. Identified as CVE-2024-0541, it targets the Tenda W9 1.0.0.7(4456) and has the potential to compromise the system or lead to data leakage. This vulnerability is of high concern due to its ability to be exploited remotely, thus exposing a large number of systems to potential risk. The issue lies within the formAddSysLogRule function of the httpd component and can lead to a stack-based buffer overflow.
Failure to address this vulnerability could potentially expose sensitive information, compromise the integrity of the system, or even enable further attacks. Furthermore, the exploit has been publicly disclosed, and despite attempts to contact the vendor, no response has been received, leaving systems vulnerable until mitigated.
Vulnerability Summary
CVE ID: CVE-2024-0541
Severity: Critical (CVSS: 8.8)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
No phone number, email, or personal info required.
Product | Affected Versions
Tenda W9 | 1.0.0.7(4456)
How the Exploit Works
The exploit operates by manipulating the sysRulenEn argument within the formAddSysLogRule function of the httpd component. This manipulation causes a stack-based buffer overflow, which could potentially allow the attacker to execute arbitrary code on the system. The vulnerability can be exploited remotely, without any user interaction or special privileges.
Conceptual Example Code
Below is a conceptual example of how the vulnerability might be exploited. In this HTTP request, the attacker sends a POST request to the vulnerable endpoint with a malicious payload that causes the buffer overflow.
POST /formAddSysLogRule HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
sysRulenEn=[Malicious Payload]Recommendations for Mitigation
As of now, the vendor has not provided a patch. As a temporary mitigation, use a Web Application Firewall (WAF) or Intrusion Detection System (IDS). These systems can detect and block attacks that attempt to exploit this vulnerability. However, the best course of action would be to apply a vendor patch once it is made available.
In the long term, consider a systematic update and patch management process to ensure that all software components are up-to-date. Furthermore, regular vulnerability assessments and penetration testing can help identify and mitigate such vulnerabilities before they can be exploited.