SSRT2330 Potential Security Vulnerability in rpc.yppasswdd

SSRT2330 Potential Security Vulnerability in rpc.yppasswdd

Post by Security Ale » Fri, 14 Feb 2003 05:19:45



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 Source: HEWLETT-PACKARD COMPANY
 SECURITY BULLETIN: HPSBUX0302-242
 Originally issued: 12 February 2003
 SSRT2330 Potential Security Vulnerability in rpc.yppasswdd
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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 rpc.yppasswdd

IMPACT: Potential denial of service, unauthorized access.

PLATFORM: HP 9000 Series 700 and 800 running HP-UX 10.10, 10.20,
          11.00, 11.11, 11.22 using rpc.yppasswdd.

SOLUTION: For 10.20 and 11.22, until a patch is available install
          the appropriate rpc.yppasswdd from the ftp site listed
          below.
          For 11.00 install PHNE_28102.
          For 11.11 install PHNE_28103.

MANUAL ACTIONS: Yes - NonUpdate
                For 10.20 and 11.22,
                install the appropriate file:
                rpc.yppasswdd_10.20,
                rpc.yppasswdd_11.22_IA.
                For 11.00 install PHNE_28102, no manual action.
                For 11.11 install PHNE_28103, no manual action.

AVAILABILITY:  The preliminary files are available now.
               This bulletin will be revised when patches
               are available.
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 A. Background
    A potential buffer overflow has been reported in rpc.yppasswdd.

    The SSRT thanks LSD Research Group (http://lsd-pl.net) for
    reporting this potential vulnerability to HP.

 B. Recommended solution
    Note: Customers running HP-UX revision 10.10 should

    For 11.00 install PHNE_28102.
    For 11.11 install PHNE_28103.

    For 10.20 and 11.22 the following preliminary fixes
    are available:

      rpc.yppasswdd_10.20
        cksum rpc.yppasswdd_10.20
        575931685 28672 rpc.yppasswdd_10.20
        MD5 (rpc.yppasswdd_10.20) =
               cf362f855dbb9493282686cf4823afec

        rpc.yppasswdd_11.22_IA
          cksum rpc.yppasswdd_11.22_IA
          2820469843 43836 rpc.yppasswdd_11.22_IA
          MD5 (rpc.yppasswdd_11.22_IA) =
                 65124c969cc6ca3ab4ed04fe08b2ca94

         If you wish to verify the md5 sum please refer to:

               HPSBUX9408-016
               Patch sums and the MD5 program

     Download the appropriate files from the ftp site.
     These files are temporary and will be deleted when
     patches are available.

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





         Copy the appropriate file to a protected directory
         (called "<new_rpc.yppasswdd_path>" below) and rename it
         "rpc.yppasswdd".

         /sbin/rc2.d/S410nis.server stop
         cd  /usr/lib/netsvc/yp
         cp  rpc.yppasswdd rpc.yppasswdd.orig
         cp /<new_rpc.yppasswdd_path>/rpc.yppasswdd rpc.yppasswdd
         /sbin/rc2.d/S410nis.server stop

 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.

    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".

 D. To report new security vulnerabilities, send email to


    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)

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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