SSRT3487 rev.4 remote denial of service in tftpd

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**REVISED 04**
 Originally issued: 18 June 2003
 Last revised: 8 August 2004
 SSRT3487 rev.4 remote denial of service in tftpd

NOTICE: There are no restrictions for distribution of this
Bulletin provided that it remains complete and intact.

The information in the following Security Bulletin should be
acted upon as soon as possible.  Hewlett-Packard Company will
not be liable for any consequences to any customer resulting
from customer's failure to fully implement instructions in this
Security Bulletin as soon as possible.

PROBLEM: Potential Security Vulnerability in tftpd.

IMPACT: Potential denial of service, remotely exploitable.

          HP-UX B.11.04, HP-UX B.11.11, HP-UX B.11.22

**REVISED 04**
SOLUTION: B.11.00 - Install PHNE_28828 or subsequent.
          B.11.04 - Install PHNE_30589 or subsequent.
 -->      B.11.11 - Remove preliminary patch and
 -->                install the general release patch.
          B.11.22 - Install a preliminary patch as
                    described below.

                B.11.22 - Install a preliminary patch.
 -->            B.11.11 - Remove the preliminary patch
 -->                      PHNE_29081.depot then install
 -->                      PHNE_28762 or subsequent.
 -->            B.11.00, B.11.04 - No manual actions.

AVAILABILITY: The B.11.0, B.11.04, and B.11.11 patches are
              available now on

CHANGE SUMMARY: Rev.1 - added 11.00 patch.
                        Modified Section C with instructions for
                        Subscriber's Choice and other changes.
                Rev.2 - added B.11.04 and B.11.11 patches.
                Rev.3 - restored B.11.11 preliminary patch.
                Rev.4 - added B.11.11 patch.
 A. Background

    Certain network traffic can potentially cause tftpd to
    become unresponsive resulting in a denial of service.


     Note: 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.

     HP-UX B.11.00
     action: Install PHNE_28828 or subsequent.

     HP-UX B.11.04
     action: Install PHNE_30589 or subsequent.

**REVISED 04**
     HP-UX B.11.11
 --> action: See MANUAL ACTIONS section of bulletin

     HP-UX B.11.22
     action: Install PHNE_29130.depot


 B. Recommended solution

**REVISED 04**
    HP-UX B.11.00 - Install PHNE_28828 or subsequent.
    HP-UX B.11.04 - Install PHNE_30589 or subsequent.
 -->HP-UX B.11.11 - See the MANUAL ACTIONS section for details.

    HP-UX B.11.22:

 -->1. Write to to recieve PHNE_29130.depot.

    2. Verify the cksum or md5 sum.

      1515060965 2885 PHNE_29130.text

      MD5 (PHNE_29130.text) = aa2a5b0f9e63fd797015be64f569c9e7

      3. Install PHNE_29130.depot using swinstall.

         Note:  This preliminary patch must be removed before
                installing the general release patch when it
                becomes available.

C: Support, Subscription, and Reporting Information

SUPPORT:  For further information, contact HP Services support

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


On the web page:
  "Driver and Support Alerts/Notifications Sign-up:
  Product Selection"
   Under "Step 1:  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.
   Complete the form and "Save".

To update an existing subscription:


  Log in on the web page
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  On the Web page:
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      use "Edit Profile" to update appropriate sections.

Note:  In addition to the individual alerts/notifications for the
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automatically receive one copy of alerts for non-operating system
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system alerts will only receive one copy of all the non-operating
system alerts).

To review previously published Security Bulletins for HP-UX:

The HP-UX Security Patch Matrix is available here:
< ?

Or via anonymous ftp:

The HP-UX Security Patch Matrix, updated daily, categorizes
security patches by platform/OS release, and by Bulletin topic.
The Security Patch Check tool completely automates the process of
reviewing the Security Patch Matrix for HP-UX 11.XX Versions.

NOTE:  Installing patches listed in the Security Patch Matrix will
completely implement the RESOLUTION in the Security Bulletin
_only_ if there are no MANUAL ACTIONS included.

The Security Patch Check tool can also verify that a Security
Bulletin RESOLUTION has been implemented on HP-UX 11.XX Versions
provided that no MANUAL ACTIONS were included.  The Security Patch
Check tool cannot verify patches implemented via product upgrade.

For information on the Security Patch Check tool, see:

REPORT:  To report a potential security vulnerability with any HP
supported product, send email to:

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
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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
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respective owners.

Version: PGP 8.0.2


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


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