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[SECURITY] [DSA 4055-1] heimdal security update

Posted on 07 December 2017
Debian Security Advisory

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Debian Security Advisory DSA-4055-1 Sebastien Delafond
December 07, 2017
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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:

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:

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