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From arshadmohammad <...@git.apache.org>
Subject [GitHub] zookeeper pull request #179: ZOOKEEPER-2693: DOS attack on wchp/wchc four le...
Date Fri, 17 Feb 2017 18:34:01 GMT
Github user arshadmohammad commented on a diff in the pull request:

    https://github.com/apache/zookeeper/pull/179#discussion_r101818408
  
    --- Diff: src/java/main/org/apache/zookeeper/server/NettyServerCnxn.java ---
    @@ -268,7 +268,7 @@ private boolean checkFourLetterWord(final Channel channel,
             // We take advantage of the limited size of the length to look
             // for cmds. They are all 4-bytes which fits inside of an int
             String cmd = FourLetterCommands.getCmdMapView().get(len);
    -        if (cmd == null) {
    +        if (cmd == null || !FourLetterCommands.getWhiteListedCmdView().contains(cmd))
{
    --- End diff --
    
    same comment as for NIOServerCnxn


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