Overview
This article covers the details of the critical cybersecurity vulnerability identified as CVE-2025-7194. This flaw affects D-Link DI-500WF 17.04.10A1T, a widely used networking device. The vulnerability resides in the function sprintf of the file ip_position.asp of the component jhttpd, leading to a stack-based buffer overflow when the ‘ip’ argument is improperly handled. As a cybersecurity professional, it’s critical to understand this vulnerability, as it allows for remote exploitation and could potentially lead to system compromise or data leakage.
Vulnerability Summary
CVE ID: CVE-2025-7194
Severity: Critical (CVSS: 8.8)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise, data leakage
Affected Products
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Product | Affected Versions
D-Link DI-500WF | 17.04.10A1T
How the Exploit Works
The vulnerability stems from improper handling of the ‘ip’ argument in the sprintf function within the file ip_position.asp of the jhttpd component. The sprintf function is used to store formatted data to a string. However, if an attacker sends an overly long ‘ip’ argument, it can overflow the stack buffer, causing it to overwrite adjacent memory. This condition, known as a stack-based buffer overflow, could allow an attacker to execute arbitrary code or cause the system to crash.
Conceptual Example Code
Here is a conceptual example of how the exploit might be executed:
POST /ip_position.asp HTTP/1.1
Host: target.example.com
Content-Type: application/json
{
"ip": "A string longer than the buffer..."
}In this example, the attacker sends a POST request with an ‘ip’ parameter that contains a string longer than the buffer allocated by the sprintf function in the ip_position.asp file. If the system is vulnerable, this will cause a buffer overflow, potentially leading to system compromise or data leakage.
Mitigation Guidance
Users are urged to apply the vendor-supplied patch as soon as possible to mitigate this vulnerability. If the patch cannot be applied immediately, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation by detecting and blocking exploit attempts.