[security bulletin] HPSBUX02117 SSRT2400 rev.1 - HP-UX Running BINDv4 Domain Name Server (DNS) Remote Unauthorized Access, Denial of Service (DoS)
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SUPPORT COMMUNICATION - SECURITY BULLETIN
Document ID: c00668546
Version: 1
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
VULNERABILITY SUMMARY
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
(DoS).
References: CERT VU#457875, HPSBGN01156
SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.
HP-UX B.11.00.
BACKGROUND
For a PGP signed version of this security bulletin please write to:
security-alert@xxxxxx
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.
AFFECTED VERSIONS
HP-UX B.11.00
=============
InternetSrvcs.INETSVCS-RUN
action: add "options no-recursion" to /etc/named.boot
END AFFECTED VERSIONS
RESOLUTION
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.
MANUAL ACTIONS: Yes - NonUpdate
add "options no-recursion" to /etc/named.boot
PRODUCT SPECIFIC INFORMATION
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?productNumber=B6834AA
HISTORY
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@xxxxxxx It is
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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.
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