Debian Security Advisory

DLA-1027-1 heimdal -- LTS security update

Date Reported:
14 Jul 2017
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 868208.
In Mitre's CVE dictionary: CVE-2017-11103.
More information:

Jeffrey Altman, Viktor Duchovni and Nico Williams identified a mutual authentication bypass vulnerability in Heimdal Kerberos. Also known as Orpheus' Lyre, this vulnerability could be used by an attacker to mount a service impersonation attack on the client if he's on the network path between the client and the service.

More details can be found on the vulnerability website (

For Debian 7 Wheezy, these problems have been fixed in version 1.6~git20120403+dfsg1-2+deb7u1.

We recommend that you upgrade your heimdal packages.

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