SSRT3487 Potential Security Vulnerability in tftpd

SSRT3487 Potential Security Vulnerability in tftpd

Post by Security Ale » Sat, 21 Jun 2003 01:59:03



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 Source: HEWLETT-PACKARD COMPANY
 SECURITY BULLETIN: HPSBUX0306-266
 Originally issued: 18 June 2003
 SSRT3487 Potential Security Vulnerability in tftpd
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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.

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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

SOLUTION: Install a preliminary patch as described below.

MANUAL ACTIONS: Yes - NonUpdate
                Install a preliminary patch.

AVAILABILITY: The preliminary patches are available now.
 -----------------------------------------------------------------
 A. Background

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

 B. Recommended solution

     AFFECTED VERSIONS

     The following is a list by HP-UX revision of
     affected filesets and the fileset revision or
     patch containing the fix.  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
     a fixed revision or the applicable patch is
     installed.

     HP-UX B.11.00
     =============
     InternetSrvcs.INETSVCS-BOOT
     InternetSrvcs.INET-ENG-A-MAN
     InternetSrvcs.INETSVCS-INC
     fix: Install PHNE_29129.depot

     HP-UX B.11.11
     =============
     InternetSrvcs.INETSVCS-BOOT
     fix: Install PHNE_29081.depot

     HP-UX B.11.22
     =============
     InternetSrvcs.INETSVCS2-BOOT
     fix: Install PHNE_29130.depot

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

        System:    hprc.external.hp.com  (192.170.19.51)
        Login:     tftpd
        Password:  tftpd

        FTP Access: ftp://tftpd:tf...@hprc.external.hp.com/
                or: ftp://tftpd:tf...@192.170.19.51/
                or: ftp hprc.external.hp.com

        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.11.00 -  PHNE_29129.text
                    PHNE_29129.depot
         B.11.11 -  PHNE_29081.text
                    PHNE_29081.depot
         B.11.22 -  PHNE_29130.text
                    PHNE_29130.depot

    2. Verify the cksum or md5 sum.

      cksum:
      3402850731 133120 PHNE_29129.depot
      3440857655 7076 PHNE_29129.text
      280396358 61440 PHNE_29081.depot
      3068789316 2986 PHNE_29081.text
      1912985866 102400 PHNE_29130.depot
      1515060965 2885 PHNE_29130.text

      MD5 (PHNE_29129.depot) = 91c5b0ed548b131cb8d5e0d7566e5555
      MD5 (PHNE_29129.text) = 83299cf3e2504b5527b4b02f8958438b
      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:
               HPSBUX9408-016
               Patch sums and the MD5 program
     Note: Using your itrc account security bulletins can be
          found here:
     http://itrc.hp.com/cki/bin/doc.pl/screen=ckiSecurityBulletin

      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.

 C. To subscribe to automatically receive future NEW HP Security
    Bulletins from the HP IT Resource Center via electronic
    mail, do the following:

    Use your browser to get to the HP IT Resource Center page
    at:

       http://itrc.hp.com

    Use the 'Login' tab at the left side of the screen to login
    using your ID and password.  Use your existing login or the
    "Register" button at the left to create a login, in order to
    gain access to many areas of the ITRC.  Remember to save the
    User ID assigned to you, and your password.

    In the left most frame select "Maintenance and Support".

    Under the "Notifications" section (near the bottom of
    the page), select "Support Information Digests".

    To -subscribe- to future HP Security Bulletins or other
    Technical Digests, click the check box (in the left column)
    for the appropriate digest and then click the "Update
    Subscriptions" button at the bottom of the page.

    or

    To -review- bulletins already released, select the link
    (in the middle column) for the appropriate digest.

    NOTE: Using your itrc account security bulletins can be
          found here:
    http://itrc.hp.com/cki/bin/doc.pl/screen=ckiSecurityBulletin

    To -gain access- to the Security Patch Matrix, select
    the link for "The Security Bulletins Archive".  (near the
    bottom of the page)  Once in the archive the third link is
    to the current Security Patch Matrix. Updated daily, this
    matrix categorizes security patches by platform/OS release,
    and by bulletin topic.  Security Patch Check completely
    automates the process of reviewing the patch matrix for
    11.XX systems.  Please note that installing the patches
    listed in the Security Patch Matrix will completely
    implement a security bulletin _only_ if the MANUAL ACTIONS
    field specifies "No."

    The Security Patch Check tool can verify that a security
    bulletin has been implemented on HP-UX 11.XX systems providing
    that the fix is completely implemented in a patch with no
    manual actions required.  The Security Patch Check tool cannot
    verify fixes implemented via a product upgrade.

    For information on the Security Patch Check tool, see:
    http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/
    displayProductInfo.pl?productNumber=B6834AA

    The security patch matrix is also available via anonymous
    ftp:

    ftp://ftp.itrc.hp.com/export/patches/hp-ux_patch_matrix/

    On the "Support Information Digest Main" page:
    click on the "HP Security Bulletin Archive".

    The PGP key used to sign this bulletin is available from
    several PGP Public Key servers.  The key identification
    information is:

       2D2A7D59
       HP Security Response Team (Security Bulletin signing only)
       <security-al...@hp.com>
       Fingerprint =
         6002 6019 BFC1 BC62 F079 862E E01F 3AFC 2D2A 7D59

    If you have problems locating the key please write to
    security-al...@hp.com.  Please note that this key is
    for signing bulletins only and is not the key returned
    by sending 'get key' to security-al...@hp.com.

 D. To report new security vulnerabilities, send email to

    security-al...@hp.com

    Please encrypt any exploit information using the
    security-alert PGP key, available from your local key
    server, or by sending a message with a -subject- (not body)
    of 'get key' (no quotes) to security-al...@hp.com.

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(c)Copyright 2003 Hewlett-Packard Company
Hewlett-Packard Company shall not be liable for technical or
editorial errors or omissions contained herein. The information
in this document is subject to change without notice.
Hewlett-Packard Company and the names of HP products referenced
herein are trademarks and/or service marks of Hewlett-Packard
Company.  Other product and company names mentioned herein may be
trademarks and/or service marks of their respective owners.

 ________________________________________________________________

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

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