This works around a blocking problem encountered with recv_telnet(). Don't hang around trying to recv when we've already got a password prompt or a success/fail response.

git-svn-id: file:///home/svn/framework3/trunk@10590 4d416f70-5f16-0410-b530-b9f4589650da

modules/auxiliary/scanner/telnet/telnet_login.rb

@@ -159,9 +159,10 @@ class Metasploit3 < Msf::Auxiliary
 			send_user(user)
 		end
 
+		recvd_sample = @recvd.dup
 		# Allow for slow echos
 		1.upto(10) do
-			recv_telnet(self.sock, 0.10)
+			recv_telnet(self.sock, 0.10) unless @recvd.nil? or @recvd[/#{@password_prompt}/] 
 		end
 
 		vprint_status("#{rhost}:#{rport} Prompt: #{@recvd.gsub(/[\r\n\e\b\a]/, ' ')}")
@@ -171,7 +172,7 @@ class Metasploit3 < Msf::Auxiliary
 
 			# Allow for slow echos
 			1.upto(10) do
-				recv_telnet(self.sock, 0.10)
+				recv_telnet(self.sock, 0.10) if @recvd == recvd_sample
 			end