Tenda F456 Buffer Overflow Vulnerability in DHCP Client Function

A stack-based buffer overflow vulnerability has been identified in the Tenda F456 router, specifically in version 1.0.0.5. The issue arises in the 'fromDhcpListClient' function within the '/goform/DhcpListClient' file of the 'httpd' component. The vulnerability is triggered by manipulating the 'page' argument, which is passed to the 'sprintf' function without proper length validation, allowing for stack memory overflow. This vulnerability can be exploited remotely, potentially leading to a denial-of-service condition or arbitrary code execution.

Impact

Exploitation of this vulnerability causes a stack-based buffer overflow, which can be leveraged 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/DhcpListClient' with a 'page' parameter that contains a long string. The absence of length checks allows the input to overflow the stack-based buffer, creating the potential for code execution or a denial-of-service condition.