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[security bulletin] HPSBTU02095 SSRT051007 rev.3 - HP Tru64 UNIX Running DNS BIND4/BIND8 as Forwarders: Remote Unauthorized Privileged Access
From: security-alert () hp com
Date: Thu, 20 Apr 2006 10:10:00 -0700

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SUPPORT COMMUNICATION - SECURITY BULLETIN

Document ID: c00595837
Version: 3

HPSBTU02095 SSRT051007 rev.3 - HP Tru64 UNIX Running DNS
BIND4/BIND8 as Forwarders: Remote Unauthorized Privileged Access

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

Release Date: 2006-04-18
Last Updated: 2006-04-19

Potential Security Impact: Remote unauthorized privileged access

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

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

References: CVE-2006-0527

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.

Note: The ERP kits binaries are the same as Revision 2 of this
bulletin except for the addition of nslookup and nslookup manpage
which support internationalization (I18N).

The ERP kits distribute the following items:

    * The BIND9 release
    * BIND9 manpages
    * /usr/bin/nslookup
    * nslookup manpage
    * 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=T64KIT1000505-V51BB26-ES-20060406
Name: T64KIT1000505-V51BB26-ES-20060406
MD5 Checksum: 5298ff7f96d97339b13b0354705a3625

HP Tru64 UNIX Version 5.1B-2/PK4 ERP Kit
Location: http://www.itrc.hp.com/service/patch/patchDetail.do?
patchid=T64KIT1000504-V51BB25-ES-20060406
Name: T64KIT1000504-V51BB25-ES-20060406
MD5 Checksum: 185b66169f0d74a7ac5edea5bbecbf11

HP Tru64 UNIX Version 5.1A PK6 ERP Kit
Location: http://www.itrc.hp.com/service/patch/patchDetail.do?
patchid=T64KIT1000519-V51AB24-ES-20060410
Name: T64KIT1000519-V51AB24-ES-20060410
MD5 Checksum: 00a95acde76a408842f6c49f81d8d605

HP Tru64 UNIX Version 4.0G PK4 ERP Kit
Location: http://www.itrc.hp.com/service/patch/patchDetail.do?
patchid=T64KIT1000521-V40GB22-ES-20060410
Name: T64KIT1000521-V40GB22-ES-20060410
MD5 Checksum: ab3cfd38b91a884b02ee2f263b0dd5b0

HP Tru64 UNIX Version 4.0F PK8 ERP Kit
Location: http://www.itrc.hp.com/service/patch/patchDetail.do?
patchid=DUXKIT1000520-V40FB22-ES-20060410
Name: DUXKIT1000520-V40FB22-ES-20060410
MD5 Checksum: 2cf4adb87454f2c391afa126f0805fd0

HISTORY
Version: 1 (rev.1) 25 January 2006 Initial release
Version: 2 (rev.2)  6 February 2006 Added additional information
Version: 3 (rev.3) 18 April 2006 Updated information, nslookup was
added supporting internationalization (I18N)


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 () hp com   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 () hp com
  Subject: get key

Subscribe: To initiate a subscription to receive future HP
Security Bulletins via Email:
http://h30046.www3.hp.com/driverAlertProfile.php?regioncode=NA&;
langcode=USENG&jumpid=in_SC-GEN__driverITRC&topiccode=ITRC

On the web page: ITRC security bulletins and patch sign-up
Under Step1: your ITRC security bulletins and patches
  - check ALL categories for which alerts are required and
    continue.
Under Step2: your ITRC operating systems
  - verify your operating system selections are checked and
    save.

To update an existing subscription:
http://h30046.www3.hp.com/subSignIn.php
Log in on the web page:
  Subscriber's choice for Business: sign-in.
On the web page:
  Subscriber's Choice: your profile summary
    - use Edit Profile to update appropriate sections.

To review previously published Security Bulletins visit:
http://www.itrc.hp.com/service/cki/secBullArchive.do

* 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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