Land rapid7#2452 - Ignore unexpected DNS answers

Author: wchen-r7

modules/auxiliary/gather/dns_info.rb

@@ -124,6 +124,7 @@ def get_ip(host)
     query = @res.search(host, "A")
     if query
       query.answer.each do |rr|
+        next unless rr.type == "A"
         record = {}
         record[:host] = host
         record[:type] = "A"
@@ -134,6 +135,7 @@ def get_ip(host)
     query1 = @res.search(host, "AAAA")
     if query1
       query1.answer.each do |rr|
+        next unless rr.type == "AAAA"
         record = {}
         record[:host] = host
         record[:type] = "AAAA"
@@ -189,6 +191,7 @@ def get_txt(target)
     query = @res.query(target, "TXT")
     return results if not query
     query.answer.each do |rr|
+      next unless rr.type == "TXT"
       record = {}
       record[:host] = target
       record[:text] = rr.txt