Tenda F1202 Stack-Based Buffer Overflow Vulnerability in PPTP User Setting 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 'fromPPTPUserSetting' function within the '/goform/PPTPUserSetting' file. The vulnerability can be exploited remotely by manipulating the 'delno' parameter, leading to potential denial-of-service conditions or arbitrary code execution.

Impact

Exploitation of this vulnerability causes a stack-based buffer overflow, which can lead to arbitrary code execution or a denial-of-service condition.

Reproduction

The vulnerability can be reproduced by sending a POST request to '/goform/PPTPUserSetting' with an excessively long 'delno' parameter. This parameter is not properly validated, allowing the overflow to occur.