Belkin F9K1122 Stack-Based Buffer Overflow Vulnerability in FormWISP5G Function

A stack-based buffer overflow vulnerability has been identified in the Belkin F9K1122 router, specifically in version 1.00.33. The issue arises in the 'formWISP5G' function within the '/goform/formWISP5G' file, where the 'webpage' parameter is not properly validated before being copied to a buffer. This flaw can be exploited remotely, potentially leading to unauthorized code execution or a denial-of-service condition.

Impact

Exploitation of this vulnerability allows for a stack-based buffer overflow, which can be used to execute arbitrary code or cause a denial-of-service condition on the device.

Reproduction

The vulnerability can be reproduced by sending a POST request to '/goform/formWISP5G' with a 'webpage' parameter that contains a payload designed to overflow the stack buffer. This can be done using a web browser or a tool like curl, by specifying the appropriate headers and content length to match the payload size.