Overview
This blog post will look into a critical vulnerability, CVE-2025-8184, which affects D-Link DIR-513 up to version 1.10. This vulnerability has potentially severe implications for data security and system integrity, especially considering the fact that it is remotely executable and the exploit has been disclosed to the public. This issue is of significant concern for users of the affected products, which, unfortunately, are no longer supported by their manufacturers.
Vulnerability Summary
CVE ID: CVE-2025-8184
Severity: Critical (8.8 / 10 on the CVSS scale)
Attack Vector: Remote
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage
Affected Products
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Product | Affected Versions
D-Link DIR-513 | Up to 1.10
How the Exploit Works
The vulnerability lies in the HTTP POST request handler component of D-Link DIR-513, specifically within the function formSetWanL2TPcallback of the file /goform/formSetWanL2TPtriggers. An attacker can exploit this vulnerability by manipulating the HTTP POST request, which leads to a stack-based buffer overflow. This overflow can potentially lead to unauthorized execution of code, allowing for system compromise and potential data leakage.
Conceptual Example Code
Here’s a conceptual example of how the vulnerability might be exploited. This example represents a malicious HTTP request that could potentially trigger a buffer overflow:
POST /goform/formSetWanL2TPtriggers HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
data=OVERLY_LONG_STRING_THAT_CAUSES_BUFFER_OVERFLOWIn this example, the OVERLY_LONG_STRING_THAT_CAUSES_BUFFER_OVERFLOW would be replaced with an actual string that’s longer than the buffer can handle, causing it to overflow and potentially allowing arbitrary code execution.
Steps to Mitigate
Given that the affected products are no longer supported by D-Link, applying a vendor patch is not an option. However, employing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as temporary mitigation against this vulnerability. It’s also recommended to replace unsupported devices with current, supported ones whenever possible to maintain a secure network environment.