[security bulletin] HPSBUX02117 SSRT2400 rev.1 - HP-UX Running BINDv4 Domain Name Server (DNS) Remote Unauthorized Access, Denial of Service (DoS) May 19 2006 01:04PM
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HPSBUX02117 SSRT2400 rev.1 - HP-UX Running BINDv4 Domain Name Server (DNS) Remote Unauthorized Access, Denial of Service (DoS)

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

Release Date: 2006-05-09
Last Updated: 2006-05-12

Potential Security Impact: Remote unauthorized access, Denial of Service (DoS)

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

A potential security vulnerability has been identified with HP-UX running the
BINDv4 Domain Name Server (DNS). The vulnerability could be exploited to
poison the DNS cache leading to remote unauthorized access or Denial of Service

References: CERT VU#457875, HPSBGN01156

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.
HP-UX B.11.00.

For a PGP signed version of this security bulletin please write to: security-alert (at) hp (dot) com [email concealed]

CERT VU#457875 ( http://www.kb.cert.org/vuls/id/457875) reports a potential security
vulnerability in the BINDv4 Domain Name Server (DNS).

HP-UX B.11.00 may be affected by this vulnerability if the BINDv4 Domain Name Server
(DNS) is configured to do both of the following:

* support recursive requests and cache the results
* respond to DNS requests made by untrusted systems

To determine if an HP-UX system has an affected version, search the output of
"swlist -a revision -l fileset" for one of the filesets listed below. For affected
systems verify that the recommended action has been taken.


HP-UX B.11.00
action: add "options no-recursion" to /etc/named.boot


The potential vulnerability may be avoided by blocking access to the system from
untrusted systems or by disabling DNS recursion.

To disable DNS recursion, add the following to /etc/named.boot:

options no-recursion

The option will take effect when named is restarted.

Note: This issue has been previously reported in HPSBGN01156 SSRT2400 rev.0 (7 August 2003). HPSBGN01156 did not have the Affected Versions for the HP-UX Security Patch Check. The Affected Versions information is contained in this Security Bulletin.

add "options no-recursion" to /etc/named.boot

HP-UX Security Patch Check: Security Patch Check revision B.02.00 analyzes all HP-issued Security Bulletins to provide a subset of recommended actions that potentially affect a specific HP-UX system. For more information: http://software.hp.com/portal/swdepot/displayProductInfo.do?productNumbe

Version: 1 (rev.1) - 15 May 2006 Initial release

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
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information. To get the security-alert PGP key, please send an
e-mail message as follows:
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* The Software Product Category that this Security Bulletin
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MI = Misc. 3rd party SW,
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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
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(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
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extent permitted by law, neither HP nor its affiliates,
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or consequential damages including downtime cost; lost profits;
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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
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and company names mentioned herein may be trademarks of their
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Version: PGP 8.1


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