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Document ID: c01123426
Version: 2

HPSBUX02251 SSRT071449 rev.2 - HP-UX Running BIND, Remote DNS Cache Poisoning

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

Release Date: 2007-08-01
Last Updated: 2007-09-10

Potential Security Impact: Remote DNS cache poisoning

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

A potential vulnerability has been identified with HP-UX running BIND. The
vulnerability could be exploited remotely to cause DNS cache poisoning.

References: CVE-2007-2926

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.
HP-UX B.11.11, B.11.23, B.11.31 running BIND v9.2 or BIND v9.3


To determine if a system has an affected version, search the output of "swlist
-a revision -l fileset" for an affected fileset. Then determine if the
recommended patch or update is installed.


For BIND v9.2.0

HP-UX B.11.11
- ->action: install BIND920_v10.depot

HP-UX B.11.23
- ->action: install PHNE_36973 or subsequent

For BIND v9.3.2

HP-UX B.11.11
- ->action: install revision C. or subsequent

HP-UX B.11.23
- ->action: install revision C. or subsequent

HP-UX B.11.31
action: install named binary file


HP has provided the following software updates and patches to resolve the

The patch is available from

The updates are available from

- ->BIND v9.2.0
 HP-UX B.11.11
 contact HP Support to receive BIND920_v10.depot or upgrade to BIND v9.3.2
revision C. or subsequent
- ->BIND v9.2.0
 HP-UX B.11.23
 install PHNE_36973 or subsequent
- ->BIND v9.3.2
 HP-UX B.11.11
 install revision C. or subsequent
- ->BIND v9.3.2
 HP-UX B.11.23
 install revision C. or subsequent
BIND v9.3.2
 HP-UX B.11.31
 install named as discussed below

Until a patch or upgrade is released for HP-UX B.11.31, HP has made binary files
available to resolve the vulnerability. Please use the following process to
download and install the binary file.

1. Download the appropriate named file from this ftp site into a secure

2. Unpack using gunzip and verify the cksum or md5sum:

1406468692 4225172 named_9.3.2_11.31IA
400611368 2269184 named_9.3.2_11.31PA

MD5 (named_9.3.2_11.31IA) = 9bd93b513fde895ebc32602824db3341
MD5 (named_9.3.2_11.31PA) = 81041c98b5699d90e0d90cca14f90d18

3. Stop the DNS server:

If named is normally started and stopped during system reboot, use this command:
/sbin/init.d/named stop

If rndc is in use, from the managing server issue ths command:
rndc stop

If not using rndc enter this command as root on the system running named:
sig_named kill

4. Confirm that named is no longer running:

ps -ef | grep named
Ignore any lines containing 'grep named'.

5. Replace named with the appropriate downloaded file.

Confirm that the downloaded file has permissions/ower/group of '544 bin bin'.
Set the ownership and permissions if necessary.

cp <downloaded file> /usr/sbin/named

6. Restart named

If named is normally started during the system reboot: /sbin/init.d/named start

Otherwise, restart named using procedures established for the system.

BIND v9.2.0 HP-UX B.11.11 - contact HP Support or upgrade to BIND v9.3.2
BIND v9.3.2 HP-UX B.11.31 - install named file


HP-UX Software Assistant: HP-UX Software Assistant is an enhanced application
that replaces HP-UX Security Patch Check. It analyzes all HP-issued Security
Bulletins and lists recommended actions that may apply to a specific HP-UX
system. It can also download patches and create a depot automatically. For more
information see:

Version: 1 (rev.1) - 1 August 2007 Initial release
Version: 2 (rev.2) - 10 September 2007 patch and updates available

Third Party Security Patches:
Third party security patches which are to be installed on systems running HP
software products should be applied in accordance with the customer's patch
management policy.

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:
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:
  Subject: get key

Subscribe: To initiate a subscription to receive future HP Security Bulletins
via Email:
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:
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:

* 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
NS = HP NonStop Servers
PI = HP Printing & Imaging
ST = HP Storage SW
TL = HP Trusted Linux
TU = HP Tru64 UNIX
VV = HP VirtualVault

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

"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

ęCopyright 2007 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 or 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.
Version: PGP 8.1


Yours truly,
HP S/W Security Team
WTEC Cupertino, California


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