Ubuntu 4.10 / 5.04 / 5.10 : heimdal vulnerability (USN-253-1)

High Nessus Plugin ID 21061


The remote Ubuntu host is missing one or more security-related patches.


A remote Denial of Service vulnerability was discovered in the heimdal implementation of the telnet daemon. A remote attacker could force the server to crash due to a NULL de-reference before the user logged in, resulting in inetd turning telnetd off because it forked too fast.

Please note that the heimdal-servers package is not officially supported in Ubuntu (it is in the 'universe' component of the archive). However, this affects you if you use a customized version built from the heimdal source package (which is supported).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected packages.

Plugin Details

Severity: High

ID: 21061

File Name: ubuntu_USN-253-1.nasl

Version: $Revision: 1.11 $

Type: local

Agent: unix

Published: 2006/03/13

Modified: 2016/05/26

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 7.8

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:heimdal-clients, p-cpe:/a:canonical:ubuntu_linux:heimdal-clients-x, p-cpe:/a:canonical:ubuntu_linux:heimdal-dev, p-cpe:/a:canonical:ubuntu_linux:heimdal-docs, p-cpe:/a:canonical:ubuntu_linux:heimdal-kdc, p-cpe:/a:canonical:ubuntu_linux:heimdal-servers, p-cpe:/a:canonical:ubuntu_linux:heimdal-servers-x, p-cpe:/a:canonical:ubuntu_linux:libasn1-6-heimdal, p-cpe:/a:canonical:ubuntu_linux:libgssapi1-heimdal, p-cpe:/a:canonical:ubuntu_linux:libhdb7-heimdal, p-cpe:/a:canonical:ubuntu_linux:libkadm5clnt4-heimdal, p-cpe:/a:canonical:ubuntu_linux:libkadm5srv7-heimdal, p-cpe:/a:canonical:ubuntu_linux:libkafs0-heimdal, p-cpe:/a:canonical:ubuntu_linux:libkrb5-17-heimdal, cpe:/o:canonical:ubuntu_linux:4.10, cpe:/o:canonical:ubuntu_linux:5.04, cpe:/o:canonical:ubuntu_linux:5.10

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

Patch Publication Date: 2006/02/17

Vulnerability Publication Date: 2006/02/06

Reference Information

CVE: CVE-2006-0677

OSVDB: 23244

USN: 253-1