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[security bulletin] SSRT051007 rev.2 - HP Tru64 UNIX Running DNS BIND4/BIND8 with Forwarders: Remote Unauthorized Privileged Access Feb 09 2006 08:39PM
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SUPPORT COMMUNICATION - SECURITY BULLETIN

Document ID: c00595837
Version: 2

HPSBTU02095 SSRT051007 rev.2 - HP Tru64 UNIX Running DNS
BIND4/BIND8 with Forwarders: Remote Unauthorized Privileged Access

NOTICE: The information in this Security Bulletin should be acted
upon as soon as possible.

Release Date: 2006-02-06
Last Updated: 2006-02-08

Potential Security Impact: Remote unauthorized privileged access

Source: Hewlett-Packard Company,
HP Software Security Response Team

VULNERABILITY SUMMARY
A potential vulnerability has been identified on the HP Tru64 UNIX
operating system running DNS BIND4 or BIND8 when used by DNS
Forwarders. The vulnerability could be exploited remotely to gain
unauthorized privileged access to the DNS clients.

References: http://isc.org/sw/bind/bind8.php

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.
The following supported versions of HP Tru64 UNIX are affected:

* HP Tru64 UNIX 5.1B-3
* HP Tru64 UNIX 5.1B-2/PK4
* HP Tru64 UNIX 5.1A PK6
* HP Tru64 UNIX 4.0G PK4
* HP Tru64 UNIX 4.0F PK8

BACKGROUND

The Internet Software Consortium's (isc.org) Berkeley Internet
Name Domain (BIND) is a popular DNS server used on many operating
systems including Tru64 UNIX.

- From the Internet Software Consortium's web site
http://www.isc.org:

BIND4/BIND8 Unsuitable for Forwarder Use

If a nameserver -- any nameserver, whether BIND or otherwise --
is configured to use "forwarders", then none of the target
forwarders can be running BIND4 or BIND8. Upgrade all
nameservers used as "forwarders" to BIND9. There is a current,
wide scale Kashpureff-style DNS cache corruption attack which
depends on BIND4 and BIND8 as "forwarders" targets.

Due to architectural limitations BIND4/BIND8 will never be
suitable for use as a forwarder target. BIND9 should be used
instead.

RESOLUTION

HP has released the following Early Release Patch kits (ERPs)
publicly for use by any customer. The ERP kits use dupatch to
install and will not install over any Customer Specific Patches
(CSPs) that have file intersections with the ERP.

The ERP kits distribute the following items:

* The BIND9 release
* BIND9 manpages
* Upgraded bindconfig application to support BIND9
(5.1B-3, 5.1B-2/PK4, and 5.1A PK6 only)

HP Tru64 UNIX Version 5.1B-3 ERP Kit
Location: http://www.itrc.hp.com/service/patch/patchDetail.do?
patchid=T64KIT1000207-V51BB26-ES-20051212
Name: T64KIT1000207-V51BB26-ES-20051212
MD5 Checksum: b4cc5c0dd9dbec8d644444e8036f44dc

HP Tru64 UNIX Version 5.1B-2/PK4 ERP Kit
Location: http://www.itrc.hp.com/service/patch/patchDetail.do?
patchid=T64KIT1000208-V51BB25-ES-20051213
Name: T64KIT1000208-V51BB25-ES-20051213
MD5 Checksum: 6b388a0067f3e26a3a161edf28506769

HP Tru64 UNIX Version 5.1A PK6 ERP Kit
Location: http://www.itrc.hp.com/service/patch/patchDetail.do?
patchid=T64KIT1000209-V51AB24-ES-20051213
Name: T64KIT1000209-V51AB24-ES-20051213
MD5 Checksum: 02b95600c15c35ad2991ec247c3cd9fb

HP Tru64 UNIX Version 4.0G PK4 ERP Kit
Location: http://www.itrc.hp.com/service/patch/patchDetail.do?
patchid=T64KIT1000211-V40GB22-ES-20051210
Name: T64KIT1000211-V40GB22-ES-20051210
MD5 Checksum: 6f44f115dc564d67c073fa56989634c1

HP Tru64 UNIX Version 4.0F PK8 ERP Kit
Location: http://www.itrc.hp.com/service/patch/patchDetail.do?
patchid=DUXKIT1000210-V40FB22-ES-20051210
Name: DUXKIT1000210-V40FB22-ES-20051210
MD5 Checksum: db6ce0a77906512ba45bc10cc8c518a7

UPDATE HISTORY
Version: 1 (rev.1) 25 January 2006 Initial release
Version: 2 (rev.2) 6 February 2006 Added additional information

Support: For further information, contact normal HP Services
support channel.

Report: To report a potential security vulnerability with any HP
supported product, send Email to: security-alert (at) hp (dot) com. [email concealed] It is
strongly recommended that security related information being
communicated to HP be encrypted using PGP, especially exploit
information. To get the security-alert PGP key, please send an
e-mail message as follows:
To: security-alert (at) hp (dot) com [email concealed]
Subject: get key

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To review previously published Security Bulletins visit:
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* The Software Product Category that this Security Bulletin
relates to is represented by the 5th and 6th characters of the
Bulletin number in the title:

GN = HP General SW,
MA = HP Management Agents,
MI = Misc. 3rd party SW,
MP = HP MPE/iX,
NS = HP NonStop Servers,
OV = HP OpenVMS,
PI = HP Printing & Imaging,
ST = HP Storage SW,
TL = HP Trusted Linux,
TU = HP Tru64 UNIX,
UX = HP-UX,
VV = HP Virtual Vault

System management and security procedures must be reviewed
frequently to maintain system integrity. HP is continually
reviewing and enhancing the security features of software products
to provide customers with current secure solutions.

"HP is broadly distributing this Security Bulletin in order to
bring to the attention of users of the affected HP products the
important security information contained in this Bulletin. HP
recommends that all users determine the applicability of this
information to their individual situations and take appropriate
action. HP does not warrant that this information is necessarily
accurate or complete for all user situations and, consequently, HP
will not be responsible for any damages resulting from user's use
or disregard of the information provided in this Bulletin. To the
extent permitted by law, HP disclaims all warranties, either
express or implied, including the warranties of merchantability
and fitness for a particular purpose, title and non-infringement."

(c)Copyright 2006 Hewlett-Packard Development Company, L.P.
Hewlett-Packard Company shall not be liable for technical or
editorial errors or omissions contained herein. The information
provided is provided "as is" without warranty of any kind. To the
extent permitted by law, neither HP nor its affiliates,
subcontractors or suppliers will be liable for incidental, special
or consequential damages including downtime cost; lost profits;
damages relating to the procurement of substitute products or
services; or damages for loss of data, or software restoration.
The information in this document is subject to change without
notice. Hewlett-Packard Company and the names of Hewlett-Packard
products referenced herein are trademarks of Hewlett-Packard
Company in the United States and other countries. Other product
and company names mentioned herein may be trademarks of their
respective owners.

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