SSRT3487 rev.5 remote denial of service in tftpd

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**REVISED 05**
 Originally issued: 18 June 2003
 Last revised: 10 January 2005
 SSRT3487 rev.5 remote denial of service in tftpd
 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.
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 05**
SOLUTION: B.11.00 - Install PHNE_28828 or subsequent.
          B.11.04 - Install PHNE_30589 or subsequent.
 -->      B.11.11 - Install PHNE_32449 or subsequent.
          B.11.22 - Install a preliminary patch as
                    described below.

                B.11.22 - Install a preliminary patch.
 -->            B.11.11, 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.
                Rev.5 - changed 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 05**
     HP-UX B.11.11
 --> action: Install PHNE_32449 or subsequent.

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


 B. Recommended solution

**REVISED 05**
    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 - Install PHNE_32449 or subsequent.

    HP-UX B.11.22:

    1. Write to to receive 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.

* The software product category that this Security Bulletin
  relates to is represented by the 5th and 6th characters of the
  Bulletin number: GN=General, MA=Management Agents,
  MI=Misc. 3rd party, MP=HP-MPE/iX, NS=HP NonStop Servers,
  OV=HP OpenVMS, PI=HP Printing & Imaging, ST=HP Storage,
  TU=HP Tru64 UNIX, TL=Trusted Linux, UX=HP-UX, VV=Virtual Vault

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Version: PGP 8.1


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


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