Debian DSA-3912-1 : heimdal - security update (Orpheus' Lyre)

high Nessus Plugin ID 101557


The remote Debian host is missing a security-related update.


Jeffrey Altman, Viktor Dukhovni, and Nicolas Williams reported that Heimdal, an implementation of Kerberos 5 that aims to be compatible with MIT Kerberos, trusts metadata taken from the unauthenticated plaintext (Ticket), rather than the authenticated and encrypted KDC response. A man-in-the-middle attacker can use this flaw to impersonate services to the client.

See for details.


Upgrade the heimdal packages.

For the oldstable distribution (jessie), this problem has been fixed in version 1.6~rc2+dfsg-9+deb8u1.

For the stable distribution (stretch), this problem has been fixed in version 7.1.0+dfsg-13+deb9u1.

See Also

Plugin Details

Severity: High

ID: 101557

File Name: debian_DSA-3912.nasl

Version: 3.7

Type: local

Agent: unix

Published: 7/17/2017

Updated: 1/4/2021

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information


Risk Factor: Medium

Score: 5.9


Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P


Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:heimdal, cpe:/o:debian:debian_linux:8.0, cpe:/o:debian:debian_linux:9.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 7/16/2017

Reference Information

CVE: CVE-2017-11103

DSA: 3912