Return-Path: X-Original-To: archive-asf-public-internal@cust-asf2.ponee.io Delivered-To: archive-asf-public-internal@cust-asf2.ponee.io Received: from cust-asf.ponee.io (cust-asf.ponee.io [163.172.22.183]) by cust-asf2.ponee.io (Postfix) with ESMTP id 1A033200C35 for ; Sun, 26 Feb 2017 06:06:50 +0100 (CET) Received: by cust-asf.ponee.io (Postfix) id 0E04D160B7B; Sun, 26 Feb 2017 05:06:50 +0000 (UTC) Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by cust-asf.ponee.io (Postfix) with SMTP id 53BC0160B5D for ; Sun, 26 Feb 2017 06:06:49 +0100 (CET) Received: (qmail 2828 invoked by uid 500); 26 Feb 2017 05:06:48 -0000 Mailing-List: contact dev-help@zookeeper.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@zookeeper.apache.org Delivered-To: mailing list dev@zookeeper.apache.org Received: (qmail 2817 invoked by uid 99); 26 Feb 2017 05:06:48 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd4-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Sun, 26 Feb 2017 05:06:48 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd4-us-west.apache.org (ASF Mail Server at spamd4-us-west.apache.org) with ESMTP id D2416C0370 for ; Sun, 26 Feb 2017 05:06:47 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd4-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -1.547 X-Spam-Level: X-Spam-Status: No, score=-1.547 tagged_above=-999 required=6.31 tests=[KAM_ASCII_DIVIDERS=0.8, RP_MATCHES_RCVD=-2.999, SPF_NEUTRAL=0.652] autolearn=disabled Received: from mx1-lw-us.apache.org ([10.40.0.8]) by localhost (spamd4-us-west.apache.org [10.40.0.11]) (amavisd-new, port 10024) with ESMTP id HDK37NL0u7Fa for ; Sun, 26 Feb 2017 05:06:47 +0000 (UTC) Received: from mailrelay1-us-west.apache.org (mailrelay1-us-west.apache.org [209.188.14.139]) by mx1-lw-us.apache.org (ASF Mail Server at mx1-lw-us.apache.org) with ESMTP id D0AF161595 for ; Sun, 26 Feb 2017 05:06:46 +0000 (UTC) Received: from jira-lw-us.apache.org (unknown [207.244.88.139]) by mailrelay1-us-west.apache.org (ASF Mail Server at mailrelay1-us-west.apache.org) with ESMTP id 10F14E08B8 for ; Sun, 26 Feb 2017 05:06:46 +0000 (UTC) Received: from jira-lw-us.apache.org (localhost [127.0.0.1]) by jira-lw-us.apache.org (ASF Mail Server at jira-lw-us.apache.org) with ESMTP id D89FE24138 for ; Sun, 26 Feb 2017 05:06:44 +0000 (UTC) Date: Sun, 26 Feb 2017 05:06:44 +0000 (UTC) From: "Michael Han (JIRA)" To: dev@zookeeper.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (ZOOKEEPER-2693) DOS attack on wchp/wchc four letter words (4lw) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 archived-at: Sun, 26 Feb 2017 05:06:50 -0000 [ https://issues.apache.org/jira/browse/ZOOKEEPER-2693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15884539#comment-15884539 ] Michael Han commented on ZOOKEEPER-2693: ---------------------------------------- Patch updated following proposal 1 for branch-3.5 (put isro and srvr in white list by default.). I'll create PR to branch-3.4 once patch lands to 3.5. > DOS attack on wchp/wchc four letter words (4lw) > ----------------------------------------------- > > Key: ZOOKEEPER-2693 > URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2693 > Project: ZooKeeper > Issue Type: Bug > Components: security, server > Affects Versions: 3.4.0, 3.5.1, 3.5.2 > Reporter: Patrick Hunt > Assignee: Michael Han > Priority: Blocker > Fix For: 3.4.10, 3.5.3 > > Attachments: ZOOKEEPER-2693-01.patch > > > The wchp/wchc four letter words can be exploited in a DOS attack on the ZK client port - typically 2181. The following POC attack was recently published on the web: > https://webcache.googleusercontent.com/search?q=cache:_CNGIz10PRYJ:https://www.exploit-db.com/exploits/41277/+&cd=14&hl=en&ct=clnk&gl=us > The most straightforward way to block this attack is to not allow access to the client port to non-trusted clients - i.e. firewall the ZooKeeper service and only allow access to trusted applications using it for coordination. -- This message was sent by Atlassian JIRA (v6.3.15#6346)