FreeBSD : FreeBSD -- heimdal KDC-REP service name validation vulnerability (420243e9-a840-11e7-b5af-a4badb2f4699)

Medium Nessus Plugin ID 103656


The remote FreeBSD host is missing one or more security-related updates.


There is a programming error in the Heimdal implementation that used an unauthenticated, plain-text version of the KDC-REP service name found in a ticket. Impact : An attacker who has control of the network between a client and the service it talks to will be able to impersonate the service, allowing a successful man-in-the-middle (MITM) attack that circumvents the mutual authentication.


Update the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 103656

File Name: freebsd_pkg_420243e9a84011e7b5afa4badb2f4699.nasl

Version: $Revision: 3.2 $

Type: local

Published: 2017/10/04

Modified: 2018/01/31

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 4

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


Base Score: 6.5

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:FreeBSD, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info, Settings/ParanoidReport

Patch Publication Date: 2017/10/03

Vulnerability Publication Date: 2017/07/12

Reference Information

CVE: CVE-2017-1110

FreeBSD: SA-17:05.heimdal