CVE-2025-4115: Critical Buffer Overflow Vulnerability in Netgear JWNR2000v2 1.0.0.11

Overview

In the ever-changing landscape of cybersecurity, a critical vulnerability has been identified in Netgear JWNR2005v2 1.0.0.11, referred to as CVE-2025-4115. This vulnerability has the potential to compromise the system and leak sensitive data, which in turn poses a significant risk to system owners. The vulnerability, which is linked to the function default_version_is_new, affects a wide number of users, making it a matter of urgency to address. Unfortunately, the vendor has been unresponsive to this disclosure, leaving many users exposed.

Vulnerability Summary

CVE ID: CVE-2025-4115
Severity: Critical (8.8 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: Not Required
Impact: Potential system compromise and data leakage

Affected Products

Product | Affected Versions

Netgear JWNR2000v2 | 1.0.0.11

How the Exploit Works

The vulnerability lies in the default_version_is_new function of the Netgear JWNR2000v2 1.0.0.11. A buffer overflow can occur when a specially crafted argument is passed to the host parameter of this function. An attacker can exploit this vulnerability by sending a specifically crafted payload to the host parameter of the function, causing the buffer to overflow. This overflow can then potentially result in arbitrary code execution, leading to system compromise or data leakage.

Conceptual Example Code

An attacker might exploit this vulnerability by sending a malicious payload to the host parameter of the default_version_is_new function. The following is a conceptual example of such a payload:

POST /default_version_is_new HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "host": "A long string that exceeds the buffer limit..." }

In this example, the “host” parameter is given a string that, due to its length, exceeds the buffer limit, triggering the overflow.

Mitigation Guidance

As the vendor has not yet responded with a patch for this vulnerability, it is recommended to use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as temporary mitigation. These systems can help detect and block malicious payloads that might exploit the vulnerability. Users should remain vigilant for updates from the vendor and apply the official patch as soon as it becomes available to ensure long-term security of their systems.