Change description a bit

Try to make this sound smoother

Author: wchen-r7

modules/exploits/windows/scada/abb_wserver_exec.rb

@@ -16,11 +16,12 @@ def initialize(info = {})
       'Name'           => 'ABB MicroSCADA wserver.exe Remote Code Execution',
       'Description'    => %q{
         This module exploits a remote stack buffer overflow vulnerability in ABB MicroSCADA. The
-        vulnerability exists on the wserver.exe component, disabled by default but required when
-        a project uses the SCIL function WORKSTATION_CALL. The issue exists on the handling of
-        EXECUTE operations, which allows unauthenticated execution of arbitrary commands. This
-        module has been tested successfully on ABB MicroSCADA Pro SYS600 9.3 over Windows XP SP3
-        and Windows 7 SP1.
+        issue is due to the handling of unauthenticated EXECUTE operations on the wserver.exe
+        component, which allows arbitrary commands. The component is disabled by default, but
+        required when a project uses the SCIL function WORKSTATION_CALL.
+
+        This module has been tested successfully on ABB MicroSCADA Pro SYS600 9.3 over
+        Windows XP SP3 and Windows 7 SP1.
       },
       'License'        => MSF_LICENSE,
       'Author'         =>