-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 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@hp.com 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@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. -----BEGIN PGP SIGNATURE----- Version: PGP 8.1 iQA/AwUBRGza8uAfOvwtKn1ZEQL7aQCgrKhOGsb0MMEAiI3tFLqC6ICmoKAAnRHY raJ/PWSEJffGpKtSQN1nyQQ9 =FmCS -----END PGP SIGNATURE-----