allow for balnk passwords

have to alter validation slightly
to allow for blank passwords

lib/metasploit/framework/login_scanner/cred_detail.rb

@@ -27,7 +27,7 @@ module Metasploit
 
         # If we have no public we MUST have a private (e.g. SNMP Community String)
         validates :private,
-          presence: true,
+          exclusion: { in: [nil] },
           if: "public.nil? or paired"
 
 

spec/lib/metasploit/framework/login_scanner/cred_detail_spec.rb

@@ -52,6 +52,18 @@ describe Metasploit::Framework::LoginScanner::CredDetail do
         cred_detail.private = 'toor'
         expect(cred_detail).to_not be_valid
       end
+
+      it 'is invalid with empty string for public' do
+        cred_detail.public = ''
+        cred_detail.private = 'toor'
+        expect(cred_detail).to_not be_valid
+      end
+
+      it 'is valid with empty string for private' do
+        cred_detail.public = 'root'
+        cred_detail.private = ''
+        expect(cred_detail).to be_valid
+      end
     end