ESB-2017.3142 - [UNIX/Linux][Debian] heimdal: Denial of service - Remote/unauthenticated 2017-12-08

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.3142
                          heimdal security update
                              8 December 2017

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

Product:           heimdal
Publisher:         Debian
Operating System:  Debian GNU/Linux 9
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-17439  

Original Bulletin: 
   http://www.debian.org/security/2017/dsa-4055

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

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Debian Security Advisory DSA-4055-1                   security@debian.org
https://www.debian.org/security/                       Sebastien Delafond
December 07, 2017                     https://www.debian.org/security/faq
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Package        : heimdal
CVE ID         : CVE-2017-17439
Debian Bug     : 878144

Michael Eder and Thomas Kittel discovered that Heimdal, an
implementation of Kerberos 5 that aims to be compatible with MIT
Kerberos, did not correctly handle ASN.1 data. This would allow an
unauthenticated remote attacker to cause a denial of service (crash of
the KDC daemon) by sending maliciously crafted packets.

For the stable distribution (stretch), this problem has been fixed in
version 7.1.0+dfsg-13+deb9u2.

We recommend that you upgrade your heimdal packages.

For the detailed security status of heimdal please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/heimdal

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

Mailing list: debian-security-announce@lists.debian.org
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