SSRT3487 Rev.1 remote denial of service in tftpd

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**REVISED 01**
 Originally issued: 18 June 2003
 Last revised: 18 March 2004
 SSRT3487 Rev.1 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.

PLATFORM: HP-UX B.11.00, HP-UX B.11.11, HP-UX B.11.22

**REVISED 01**
SOLUTION: B.11.00 - Install PHNE_28828 or subsequent.
 -->      B.11.11 and B.11.22 - Install a preliminary patch as
          described below.

 -->            B.11.11 and B.11.22 - Install a preliminary patch.
 -->            B.11.00 - No manual actions.

AVAILABILITY: The B.11.00 patch is available now on

CHANGE SUMMARY: Rev.1 - added 11.00 patch.
                        Modified Section C with instructions for
                        Subscriber's Choice and other changes.
 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.

**REVISED 01**
     HP-UX B.11.00
 --> action: Install PHNE_28828 or subsequent.

     HP-UX B.11.11
     action: Install PHNE_29081.depot

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


 B. Recommended solution

**REVISED 01**
 -->HP-UX B.11.00 - Install PHNE_28828 or subsequent.

 -->HP-UX B.11.11 and HP-UX B.11.22:

    1. Download the appropriate preliminary patch from the
       following ftp site:

        System:  (
        Login:     tftpd
        Password:  tftpd

        FTP Access:
                or: ftp://tftpd:tftpd@
                or: ftp

        Note: There is an ftp defect in IE5 that may result in
               a browser hang.  To work around this:
        - Select Tools -> Internet Options -> Advanced
        - Un-check the option:
                  [ ] Enable folder view for FTP sites

         B.11.11 -  PHNE_29081.text
         B.11.22 -  PHNE_29130.text

    2. Verify the cksum or md5 sum.

      280396358 61440 PHNE_29081.depot
      3068789316 2986 PHNE_29081.text
      1912985866 102400 PHNE_29130.depot
      1515060965 2885 PHNE_29130.text

      MD5 (PHNE_29081.depot) = 0d95e24a8a65f64b3af34775bb216df4
      MD5 (PHNE_29081.text) = 791a03c155f263e5ed648d6c0e7ef9d1
      MD5 (PHNE_29130.depot) = a26acbf0cc0edcd7094c8c02e98dbb50
      MD5 (PHNE_29130.text) = aa2a5b0f9e63fd797015be64f569c9e7

     Note: If you wish to verify the md5 sum and you do not
           have a copy of md5, please refer to:
               Patch sums and the MD5 program
     Note: Using your itrc account security bulletins can be
          found here:

      3. Install the appropriate depot file using swinstall.

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

**REVISED 01**
 -->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
   "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 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
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 - not licensed for commercial use:


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


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