[Bro-Dev] [JIRA] (BIT-1431) Loss of information due to analyzer capitalization changes

Seth Hall (JIRA) jira at bro-tracker.atlassian.net
Mon Jul 6 13:46:00 PDT 2015

Seth Hall created BIT-1431:

             Summary: Loss of information due to analyzer capitalization changes
                 Key: BIT-1431
                 URL: https://bro-tracker.atlassian.net/browse/BIT-1431
             Project: Bro Issue Tracker
          Issue Type: Problem
          Components: Bro
    Affects Versions: 2.5
            Reporter: Seth Hall

Currently some of Bro's analyzers are changing the case of data before passing it along to events which is fairly dramatic loss of information in some cases.

The two known examples right now are the query in DNS (lowercased) and the header field name in HTTP (uppercased).  The question is if we should brute force change these to stop modifying the original values and have people fix any scripts that it breaks (watching for header value names is the biggie here) or if we should use some alternate mechanism to allow the existing behavior to have a sundown time period.

I say we should just break it since the quantity of existing scripts in the world is still fairly small and the number of scripts that it affects is even less (many scripts won't be affected at all).

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