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________________________________________________________________________________
                    Sun Microsystems, Inc. Security Bulletin

Bulletin Number:        #00209
Date:                   October 22, 2001
Cross-Ref:              CERT Vulnerability Note VU#327281
Title:                  rpc.yppasswdd
________________________________________________________________________________

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________________________________________________________________________________

1.  Bulletins Topics

    Sun announces the release of patches for Solaris(tm) 8, 7, and
    2.6 (SunOS(tm) 5.8, 5.7, and 5.6) which relate to a buffer overflow
    vulnerability in rpc.yppasswdd.

    Sun recommends that you install the patches listed in section 4
    immediately on NIS master servers running SunOS 5.8, 5.7, and 5.6.

2.  Who is Affected

        Vulnerable:                SunOS 5.8, 5.8_x86, 5.7, 5.7_x86, 5.6,
                                   and 5.6_x86
        Not vulnerable:            SunOS 5.5.1, 5.5.1_x86 and earlier
                                   SunOS versions

3.  Understanding the Vulnerability

    The rpc.yppasswdd daemon runs on all master server machines that are
    set up to use NIS.  The rpc.yppasswdd daemon handles password change
    requests from yppasswd(1).  A buffer overflow vulnerability has been
    discovered in rpc.yppasswd which may be exploited by a local or a
    remote attacker to gain root access on the NIS master server system.

    CERT Vulnerability Note VU#327281 is available from:

    https://www.kb.cert.org/vuls/id/327281

4.  List of Patches

    The following patches are available in relation to the above problems.

    OS Version                Patch ID
    __________                _________
    SunOS 5.8                111596-02
    SunOS 5.8_x86            111597-02
    SunOS 5.7                111590-02
    SunOS 5.7_x86            111591-02
    SunOS 5.6                106303-03
    SunOS 5.6_x86            106304-03
_______________________________________________________________________________

APPENDICES

A.  Patches listed in this bulletin are available to all Sun customers at:

    https://sunsolve.sun.com/securitypatch

B.  Checksums for the patches listed in this bulletin are available at:

    ftp://sunsolve.sun.com/pub/patches/CHECKSUMS

C.  Sun security bulletins are available at:

    https://sunsolve.sun.com/security

D.  Sun Security Coordination Team's PGP key is available at:

    https://sunsolve.sun.com/pgpkey.txt

E.  To report or inquire about a security problem with Sun software, contact
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        - Your local Sun answer centers
        - Your representative computer security response team, such as CERT
        - Sun Security Coordination Team. Send email to:

        security-alert@sun.com

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________________________________________________________________________________

Copyright 2001 Sun Microsystems, Inc. All rights reserved. Sun,
Sun Microsystems, Solaris and SunOS are trademarks or registered trademarks
of Sun Microsystems, Inc. in the United States and other countries. This
Security Bulletin may be reproduced and distributed, provided that this
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