# ip-com-4
vendor:IP-COM

product:M50

version:V15.11.0.33(10768)

type:Buffer Overflow

author:Yifeng Li, Wolin Zhuang;

## Vulnerability description
We found an buffer overflow vulnerability in IP-COM Technology IP-COM’s M50 routers with firmware which was released recently, allows control rules to attack it.

## Buffer Overflow vulnerability
In formAddDnsHijack function, the parameter “rules” is directly strcpy to a local variable placed on the stack, which overrides the return address of the function, causing buffer overflow.

## PoC
### Buffer Overflow

We set the value of “rules” as aaaaaaaaaaaaaaaaaaaaaaaaa…… and the router will cause buffer overflow.