K-010: Solaris Snoop Buffer Overflow Vulnerability

PROBLEM:       A buffer overflow vulnerability has been identified in the
               network utility program snoop when processing requests to the
               rquotad rpc service.
PLATFORM:      SunOS 5.7, 5.7_x86, 5.6, 5.6_x86, 5.5.1, 5.5.1_x86, 5.5_x86,
               5.4, 5.4_x86, and 5.3.
DAMAGE:        A buffer overflow may be exploited to gain root access.
SOLUTION:      Apply the available patches.
VULNERABILITY  The risk is HIGH. Buffer overflow attacks are common and easy
ASSESSMENT:    to execute.

[  Start SUN Security Bulletin  ]


                   Sun Microsystems, Inc. Security Bulletin

Bulletin Number:        #00190
Date:           December 9, 1999
Cross-Ref:      ISS Security Advisory, December 9, 1999
Title:          snoop
____________________________________________________________________________

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1.  Bulletins Topics

    Sun announces the release of patches for Solaris(tm) 7, 2.6, 2.5.1,
    2.5, 2.4, and 2.3 (SunOS(tm) 5.7, 5.6, 5.5.1, 5.5, 5.4 and 5.3), which
    relate to a vulnerability with snoop.

    Sun recommends that you install the patches listed in section 4
    immediately on systems running SunOS 5.7, 5.6, 5.5.1, 5.5, 5.4, and 5.3.

2.  Who is Affected

    Vulnerable:     SunOS 5.7, 5.7_x86, 5.6, 5.6_x86, 5.5.1, 5.5.1_x86,
                          5.5, 5.5_x86, 5.4, 5.4_x86, and 5.3.

    Not vulnerable: All other supported versions of SunOS.

3.  Understanding the Vulnerability

    The snoop program captures packets from the network and displays their
    contents. A buffer overflow vulnerability has been discovered which may
    be exploited by a remote attacker to execute arbitrary instructions
    and gain root access. The buffer overflow occurs when snoop analyzes
    certain types of large requests to the rquotad rpc service.

4.  List of Patches

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

    OS Version          Patch ID
    __________          _________
    SunOS 5.7           108482-01
    SunOS 5.7_x86               108483-01
    SunOS 5.6           108492-01
    SunOS 5.6_x86               108493-01
    SunOS 5.5.1         104960-02
    SunOS 5.5.1_x86     104961-02
    SunOS 5.5           108501-01
    SunOS 5.5_x86               108502-01
    SunOS 5.4           108490-01
    SunOS 5.4_x86               108491-01
    SunOS 5.3           108489-01

_____________________________________________________________________________
Sun acknowledges, with thanks, Internet Security Systems (ISS) for bringing
this vulnerability to our attention.
_____________________________________________________________________________



APPENDICES

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

http://sunsolve.sun.com/pub-cgi/show.pl?target=patches/patch-license&na
http://sunsolve.sun.com/pub-cgi/show.pl?target=patches/patch-license&nav=pub
-patches

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:

    http://sunsolve.sun.com/pub-cgi/secBulletin.pl

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

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

E.  To report or inquire about a security problem with Sun software, contact
    one or more of the following:

        - Your local Sun answer centers
        - Your representative computer security response team, such as CERT
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Copyright 1999 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
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[  End SUN Security Bulletin  ]

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