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Debian: DSA-4055-1: heimdal security update

Date 07 Dec 2017

Category Debian Linux Distribution - Security Advisories

226

Posted By LinuxSecurity Advisories

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


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Debian Security Advisory DSA-4055-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
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/

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