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From james-sirota <...@git.apache.org>
Subject [GitHub] incubator-metron pull request #300: METRON-489: RemoveSubdomains Stellar Fun...
Date Fri, 07 Oct 2016 18:10:05 GMT
Github user james-sirota commented on a diff in the pull request:

    https://github.com/apache/incubator-metron/pull/300#discussion_r82441035
  
    --- Diff: metron-platform/metron-common/src/main/java/org/apache/metron/common/dsl/functions/NetworkFunctions.java
---
    @@ -78,13 +78,16 @@ public Object apply(List<Object> list) {
     
         @Override
         public Object apply(List<Object> objects) {
    +      if(objects.isEmpty()) {
    +        return null;
    +      }
           Object dnObj = objects.get(0);
           InternetDomainName idn = toDomainName(dnObj);
           if(idn != null) {
             String dn = dnObj.toString();
             String tld = idn.publicSuffix().toString();
    -        String suffix = Iterables.getFirst(Splitter.on(tld).split(dn), null);
    -        if(suffix != null)
    +        String suffix = dn.substring(0, dn.length() - tld.length());
    +        if(suffix != null )
    --- End diff --
    
    www.subdomain.com.com is not a valid TLD.  for a list of valid domains see here: https://publicsuffix.org/list/effective_tld_names.dat
    
    If the system sees this kind of domain this should immediately be flagged as alert and
triaged with a very high score


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