Tenda F456 Buffer Overflow Vulnerability in httpd Component

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 httpd component, within the fromSetIpBind function of the file /goform/SetIpBind. The vulnerability is triggered by manipulating the 'page' argument, which is passed to the sprintf function without proper length validation, allowing for a stack overflow. This vulnerability can be exploited remotely, and public proof-of-concept exploit is available.

Impact

Exploitation of this vulnerability leads to a stack-based buffer overflow, which can commonly result in arbitrary code execution or causing a denial-of-service condition.

Reproduction

The vulnerability can be reproduced by sending a POST request to the /goform/SetIpBind endpoint. The request must include a 'page' parameter filled with a payload that exceeds the buffer's capacity, effectively causing the overflow.