Netis WF2880 Buffer Overflow Vulnerability in cgitest.cgi Allowing Denial-of-Service

A buffer overflow vulnerability has been identified in the Netis WF2880 router, specifically in the v2.1.40207 firmware. The issue occurs in the FUN_00476598 function of the cgitest.cgi file. Attackers can exploit this vulnerability by manipulating the wl_base_set_5g value in the payload, leading to a program crash and potentially causing a Denial-of-Service (DoS) condition.

Impact

Exploitation of this vulnerability causes a buffer overflow, leading to a program crash and a Denial-of-Service condition.

Reproduction

The vulnerability can be reproduced by sending a payload that includes a large value for the wl_base_set_5g parameter, along with other required parameters. This can be done using a command that simulates the router's environment, such as with QEMU.