Overview
A critical vulnerability has been discovered in Tenda CH22 1.0.0.1, a popular networking device. This vulnerability, identified as CVE-2025-5619, affects the ‘formaddUserName’ function of the ‘/goform/addUserName’ file within the system. The function’s argument manipulation, specifically the ‘Password’, can lead to a stack-based buffer overflow situation. As with many other critical vulnerabilities, this issue holds a high risk for potential system compromise or data leakage. Cybersecurity analysts and IT professionals should be aware and vigilant, given that the exploit has already been disclosed to the public and can be initiated remotely.
Vulnerability Summary
CVE ID: CVE-2025-5619
Severity: Critical (8.8 CVSS Score)
Attack Vector: Remote
Privileges Required: Low
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
Tenda | CH22 1.0.0.1
How the Exploit Works
The vulnerability lies within the ‘formaddUserName’ function in the ‘/goform/addUserName’ file. The exploit is triggered when the ‘Password’ argument is manipulated, which leads to a stack-based buffer overflow. This overflow can potentially overwrite critical program data, system control data, or even the return address. The exploit can be initiated remotely without any user interaction. Successful exploitation may result in system compromise or data leakage.
Conceptual Example Code
To illustrate a potential exploit, consider the following example of a malicious HTTP request:
POST /goform/addUserName HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
username=admin&password=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...In this example, the password field is filled with an excessively long string, causing a buffer overflow. This could potentially overwrite critical data and compromise the system.
Please note that this is a conceptual example and the actual exploit may vary. This information is provided for educational purposes, to understand the nature of the vulnerability and to encourage swift mitigation actions.