Fix rand_text_alpha and bump max exploit count to 21

Author: wchen-r7

lib/msf/core/exploit/remote/browser_exploit_server.rb

@@ -87,10 +87,10 @@ def initialize(info={})
       # Requirements are conditions that the browser must have in order to be exploited.
       @requirements = extract_requirements(self.module_info['BrowserRequirements'] || {})
 
-      @info_receiver_page     = rand_text_alpha(5)
-      @exploit_receiver_page  = rand_text_alpha(6)
-      @noscript_receiver_page = rand_text_alpha(7)
-      @flash_swf              = "#{rand_text_alpha(9)}.swf"
+      @info_receiver_page     = Rex::Text.rand_text_alpha(5)
+      @exploit_receiver_page  = Rex::Text.rand_text_alpha(6)
+      @noscript_receiver_page = Rex::Text.rand_text_alpha(7)
+      @flash_swf              = "#{Rex::Text.rand_text_alpha(9)}.swf"
 
       register_options(
       [

modules/auxiliary/server/browser_autopwn2.rb

@@ -78,7 +78,7 @@ def initialize(info={})
 
     register_advanced_options([
         OptInt.new('ExploitReloadTimeout', [false, 'Number of milliseconds before trying the next exploit', 3000]),
-        OptInt.new('MaxExploitCount', [false, 'Number of browser exploits to load', 20]),
+        OptInt.new('MaxExploitCount', [false, 'Number of browser exploits to load', 21]),
         OptString.new('HTMLContent', [false, 'HTML Content', '']),
         OptAddressRange.new('AllowedAddresses', [false, "A range of IPs you're interested in attacking"]),
         OptInt.new('MaxSessionCount', [false, 'Number of sessions to get', -1]),