AUSCERT External Security Bulletin Redistribution

        SSRT2330 Potential Security Vulnerability in rpc.yppasswdd
                             14 February 2003


        AusCERT Security Bulletin Summary

Product:                rpc.yppasswdd
Vendor:                 Hewlett-Packard
Operating System:       HP-UX 11.22
                        HP-UX 11.11
                        HP-UX 11.00
                        HP-UX 10.20
                        HP-UX 10.10
Platform:               HP 9000 Series 700 and 800
Impact:                 Denial of Service
                        Root Compromise
Access Required:        Remote

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 Originally issued: 12 February 2003
 SSRT2330 Potential Security Vulnerability in rpc.yppasswdd

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 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
          For 11.00 install PHNE_28102.
          For 11.11 install PHNE_28103.

                For 10.20 and 11.22,
                install the appropriate file:
                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.
 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
          write to security-alert@hp.com for more information.

    For 11.00 install PHNE_28102.
    For 11.11 install PHNE_28103.

    For 10.20 and 11.22 the following preliminary fixes
    are available:

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

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

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

               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  (
        Login:     yppass
        Password:  yppass

        FTP Access: ftp://bind:bind1@hprc.external.hp.com/
                or: ftp://bind:bind1@


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

         /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

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 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)
    of 'get key' (no quotes) to security-alert@hp.com.


(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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