ESB-2019.0367 - [Win][Linux][Debian] mumble: Denial of service - Remote/unauthenticated 2019-02-07

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0367
                          mumble security update
                              7 February 2019

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

Product:           mumble
Publisher:         Debian
Operating System:  Debian GNU/Linux 8
                   Linux variants
                   Windows
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-20743  

Original Bulletin: 
   https://security-tracker.debian.org/tracker/DLA-1661-1

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Debian. It is recommended that administrators 
         running mumble check for an updated version of the software for 
         their operating system.

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Package        : mumble
Version        : 1.2.8-2+deb8u1
CVE ID         : CVE-2018-20743
Debian Bug     : 919249


It has been found that the mumble-server mishandles multiple
concurrent requests that are persisted in the database, which allows
remote attackers to cause a denial of service (daemon hang or crash)
via a message flood. With the new security update a rate limiter is
added with Leaky-Bucket algorithm.

For Debian 8 "Jessie", this problem has been fixed in version
1.2.8-2+deb8u1.

We recommend that you upgrade your mumble packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

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===========================================================================
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The University of Queensland
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