Overview
The vulnerability in discussion, CVE-2025-50613, affects the Netis WF2880 v2.1.40207. It’s a buffer overflow vulnerability that can allow attackers to cause a program crash, potentially leading to a Denial of Service (DoS) attack. This presents a significant risk to organizations relying on this software, as it could lead to system compromise and data leakage.
Vulnerability Summary
CVE ID: CVE-2025-50613
Severity: High (7.5 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage
Affected Products
Product | Affected Versions
Netis WF2880 | v2.1.40207
How the Exploit Works
The vulnerability resides in the FUN_00475e1c function of the cgitest.cgi file. Attackers can exploit this vulnerability by controlling the value of `wds_key_wep` in the payload. When an attacker sends an overly large value for `wds_key_wep`, it exceeds the buffer limit, causing a buffer overflow. This results in the program crashing, which can potentially lead to a Denial of Service (DoS) attack.
Conceptual Example Code
Here’s a conceptual example that demonstrates how the vulnerability might be exploited. This example assumes the attacker is sending a POST request with a large payload to the vulnerable endpoint.
POST /cgitest.cgi HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
wds_key_wep=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...In this example, the attacker sends a large amount of ‘A’ characters as the `wds_key_wep` value, triggering a buffer overflow and potentially causing a program crash or a DoS attack.
Please note that this is a conceptual example and may not represent an actual exploit scenario. It is intended for educational purposes only.
