Tenda F1202 Stack-Based Buffer Overflow Vulnerability in GstDhcpSetSer Function

A stack-based buffer overflow vulnerability has been identified in the Tenda F1202 router, specifically in version 1.2.0.20(408). The issue arises in the GstDhcpSetSer function within the /goform/GstDhcpSetSerof file. The vulnerability can be exploited remotely by manipulating the 'dips' argument, leading to a buffer overflow on the stack.

Impact

Exploitation of this vulnerability causes a stack-based buffer overflow, which can result in a denial-of-service condition or potentially allow for remote code execution.

Reproduction

The vulnerability can be reproduced by sending a POST request to the /goform/SafeEmailFilter endpoint. The request must include a 'page' parameter with a payload designed to overflow the stack-based buffer. This can be done by repeating a string of characters to exceed the buffer's capacity, which can then be used to execute arbitrary code or cause a denial-of-service condition.