Tenda F453 Stack-Based Buffer Overflow Vulnerability

A stack-based buffer overflow vulnerability has been identified in the Tenda F453 router, specifically in version 1.0.0.3. The issue arises in the 'fromPPTPUserSetting' function within the '/goform/PPTPUserSetting' file, part of the 'httpd' component. The vulnerability is triggered by manipulating the 'delno' parameter, which is not properly validated before being passed to a buffer. This oversight allows for remote exploitation, potentially leading to unauthorized code execution or a denial-of-service condition.

Impact

Exploitation of this vulnerability allows for 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/PPTPUserSetting' with an excessively long 'delno' parameter. The 'delno' value should be crafted to overflow the stack-based buffer, bypassing any length checks.