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

high Nessus Plugin ID 101557
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Synopsis

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

Description

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 https://orpheus-lyre.info/ for details.

Solution

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

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=868208

https://orpheus-lyre.info/

https://packages.debian.org/source/jessie/heimdal

https://packages.debian.org/source/stretch/heimdal

https://www.debian.org/security/2017/dsa-3912

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

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

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: 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