Follow @bcoles recommendations for 'check' function.

modules/exploits/linux/snmp/awind_snmp_exec.rb

@@ -58,9 +58,15 @@ class MetasploitModule < Msf::Exploit::Remote
       sys_description = snmp.get_value('1.3.6.1.2.1.1.1.0').to_s
       print_status("Target system is #{sys_description}")
       # AM-100 and AM-101 considered EOL, no fix so no need to check version.
-      return Exploit::CheckCode::Vulnerable if sys_description.include? "Crestron Electronics AM-100" or sys.description.include? "Crestron Electronics AM-101"
-      # TODO: insert description check for other vulnerable models (that I don't have)
-      # In the meantime, we return 'unknown'.
+      model = sys_description.scan(/Crestron Electronics (AM-100|AM-101)/).flatten.first
+      case model
+      when 'AM-100', 'AM-101'
+          return CheckCode::Vulnerable
+      else
+          # TODO: insert description check for other vulnerable models (that I don't have)
+          # In the meantime, we return 'safe'.
+          return CheckCode::Safe
+      end
     rescue SNMP::RequestTimeout
       print_error("#{ip} SNMP request timeout.")
     rescue Rex::ConnectionError