Overview
The world of cybersecurity is a constantly evolving battlefield, with vulnerabilities being discovered, patched, and exploited on a daily basis. One such critical vulnerability has been identified in the D-Link DIR-619L 2.06B01, a product that is no longer supported by its maintainer. This vulnerability, classified as a stack-based buffer overflow, can be exploited remotely and can potentially lead to system compromise or data leakage. Given the severity of this vulnerability and the potential damage it could cause, it is imperative that users take immediate steps to mitigate its impact.
Vulnerability Summary
CVE ID: CVE-2025-6369
Severity: Critical (8.8 CVSS Severity Score)
Attack Vector: Remote
Privileges Required: None
User Interaction: Not Required
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
D-Link DIR-619L | 2.06B01
How the Exploit Works
The vulnerability resides in the ‘formdumpeasysetup’ function of the ‘/goform/formdumpeasysetup’ file. It is triggered when the ‘curTime/config.save_network_enabled’ argument is manipulated. This manipulation leads to a buffer overflow, a situation where more data is written into a block of memory (buffer) than it can hold. As the overflowed data corrupts adjacent memory spaces, it can cause erratic program behavior, crashes, or even the execution of malicious code.
Conceptual Example Code
The following is a conceptual example of how this vulnerability might be exploited. This pseudocode represents a malicious HTTP request that manipulates the ‘curTime/config.save_network_enabled’ argument, triggering the buffer overflow:
POST /goform/formdumpeasysetup HTTP/1.1
Host: vulnerableDLinkDevice.example.com
Content-Type: application/json
{ "curTime": "1234567890", "config.save_network_enabled": "malicious_overflow_string_here" }Remember, this is a conceptual example and the actual exploit might be much more complex, involving specific overflow strings and potential shell code for system compromise.
It’s important to note that this vulnerability can be exploited remotely without user interaction or elevated privileges. Therefore, all users of the affected product should take immediate steps to mitigate this vulnerability, such as applying vendor patches or using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary solution.