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UNIRAS Brief - 327/04 - HP - SSRT4741 rev.0 DCE for HP Tru64 UNIX Potential RPC Buffer Overrun Attack


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   UNIRAS (UK Govt CERT) Briefing Notice - 327/04 dated 25.06.04  Time: 12:53  
  UNIRAS is part of NISCC (National Infrastructure Security Co-ordination Centre)
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  UNIRAS material is also available from its website at www.uniras.gov.uk and
         Information about NISCC is available from www.niscc.gov.uk
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SSRT4741 rev.0 DCE for HP Tru64 UNIX Potential RPC Buffer Overrun Attack


Hash: SHA1


 HPSBTU01051     REVISION: 0

 SSRT4741 rev.0 DCE for HP Tru64 UNIX Potential
 RPC Buffer Overrun Attack

 There are no restrictions for distribution of this Bulletin  provided that it remains complete and intact.  The information in this Security bulletin should be acted upon  as soon as possible.

 INITIAL RELEASE:    21 June 2004

 POTENTIAL SECURITY IMPACT: Buffer overflow denial of service

           HP Software Security Response Team

REFERENCES: VU#259796, VU#568148, VU#326746, VU#377804

A problem has been detected where an exploit program sends invalid packet data which causes a buffer overflow in DCE servers and could create a denial of service.

SUPPORTED SOFTWARE VERSIONS*:  ONLY impacted versions are listed. All versions of DCE/DFS for Tru64 UNIX are vulnerable v4.1.4 (ifspec), v4.1.5, v4.2 and v4.3

A problem has been detected where an exploit program sends invalid packet data which causes a buffer overflow in DCE servers. After numerous attacks, the server will not respond to normal DCE requests. This buffer overflow may also affect DCE clients: If DCE clients have any open associations to a server, the overrun attack could hit that association and also cause it to overflow.

As of December 31, 2003, remedial support for DCE has been transferred to Entegrity Solutions for all HP Tru64 DCE/DFS products. See the Entegrity Solutions support http://support.entegrity.com  for details.

For a listing of all HP Tru64 UNIX security patch kits please visit the following web site: http://h30097.www3.hp.com/unix/security-download.html 

 Visit the Entegrity Solutions support site for details on  obtaining the security patches:  http://support.entegrity.com

 NOTE: If you are using a version of HP Tru64 DCE/DFS not  mentioned, contact Entegrity Technical Support.  support@xxxxxxxxxxxxx

 o Follow the instructions to download the software.

 o Install the software (follow the instructions in the  Installation and Configuration Guide included in the  documentation download and posted on the online  Documentation Library).

SUPPORT: For further information, contact HP Services support channel.

SUBSCRIBE: To initiate a subscription to receive future HP Security Bulletins via Email: http://h30046.www3.hp.com/driverAlertProfile.php?regioncode=NA&lang
On the web page: Driver and Support Alerts/Notifications Sign-up: Product Selection Under Step1: your products 1. Select product category: - a minimum of servers must be selected. 2. Select product family or search: - a minimum of one product must be selected. 3. Add a product: - a minimum of one product must be added. In Step 2: your operating system(s) - check ALL operating systems for which alerts are required. 4. Complete the form 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.

Note: In addition to the individual alerts/notifications for the selected operating systems/products, subscribers will automatically receive one copy of alerts for non-operating system categories (i.e., a subscriber who signs up for all six operating system alerts will only receive one copy of all the non-operating system alerts).

To review previously published Security Bulletins visit: http://itrc.hp.com/cki/bin/doc.pl/screen=ckiSecurityBulletin 

REPORT: To report a potential security vulnerability with any HP supported product, send Email to: security-alert@xxxxxxx It is strongly recommended that security related information being communicated to HP be encrypted using PGP, especially exploit information.  To obtain the security-alert PGP key please send an e-mail message to security-alert@xxxxxx with the Subject of 'get key' (no quotes). 

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 2004 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 8.0.2


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UNIRAS wishes to acknowledge the contributions of Hewlett-Packard Development 
Company for the information contained in this Briefing. 
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This Briefing contains the information released by the original author. Some 
of the information may have changed since it was released. If the vulnerability 
affects you, it may be prudent to retrieve the advisory from the canonical site 
to ensure that you receive the most current information concerning that problem.

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with the usage of information contained within this notice.

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and has contacts with other international Incident Response Teams (IRTs) in 
order to foster cooperation and coordination in incident prevention, to prompt 
rapid reaction to incidents, and to promote information sharing amongst its 
members and the community at large. 
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<End of UNIRAS Briefing>

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