ESB-2017.2554 - [FreeBSD] zookeeper: Denial of service - Remote/unauthenticated 2017-10-12

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2554
                      zookeeper -- Denial Of Service
                              12 October 2017

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           zookeeper
Publisher:         FreeBSD
Operating System:  FreeBSD
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-5637  

Reference:         ESB-2017.2034
                   ESB-2017.1398

Original Bulletin: 
   http://www.vuxml.org/freebsd/af61b271-9e47-4db0-a0f6-29fb032236a3.html

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zookeeper -- Denial Of Service

Affected packages
zookeeper	<	3.4.10
Details

VuXML ID	af61b271-9e47-4db0-a0f6-29fb032236a3
Discovery	2017-10-09
Entry	2017-10-10
zookeeper developers report:

Two four letter word commands "wchp/wchc" are CPU intensive and could cause 
spike of CPU utilization on Apache ZooKeeper server if abused, which leads 
to the server unable to serve legitimate client requests. Apache ZooKeeper 
thru version 3.4.9 and 3.5.2 suffer from this issue, fixed in 3.4.10, 3.5.3, 
and later.

References

CVE Name	CVE-2017-5637
URL	https://lists.apache.org/thread.html/58170aeb7a681d462b7fa31cae81110cbb749d2dc83c5736a0bb8370@%3Cdev.zookeeper.apache.org%3E

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