Sun Security Bulletin #00154

[aleph1 () DFW NET (Aleph One)]

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________________________________________________________________________________
                   Sun Microsystems, Inc. Security Bulletin

Bulletin Number:        #00154
Date:                   September 17, 1997
Cross-Ref:
Title:                  libX11
________________________________________________________________________________
Permission is granted for the redistribution of this Bulletin, so long as
the Bulletin is not edited and is attributed to Sun Microsystems. Portions
may also be excerpted for re-use in other security advisories so long as
proper attribution is included.

Any other use of this information without the express written consent of
Sun Microsystems is prohibited. Sun Microsystems expressly disclaims all
liability for any misuse of this information by any third party.
________________________________________________________________________________

1.  Bulletins Topics

    Sun announces the release of patches for Solaris 2.5.1, 2.5, 2.4, 2.3,
    (SunOS 5.5.1, 5.5, 5.4, 5.3), SunOS 4.1.4, and 4.1.3_U1, which relate
    to vulnerabilities in libX11.

    Sun strongly recommends that you install the patches listed in section 4
    immediately on systems running SunOS 5.5.1, 5.5, 5.4, 5.3, 4.1.4, and
    4.1.3_U1. Exploit information is publicly available.

2.  Who is Affected

    Vulnerable:  SunOS versions 5.5.1, 5.5.1_x86, 5.5, 5.5_x86,
                                5.4, 5.4_x86, 5.3, 4.1.4, and 4.1.3_U1

    The vulnerabilities are fixed in Solaris 2.6.

3.  Understanding the Vulnerabilities

    libX11 is a library in the X Windows system. There are several buffers
    in libX11 that may be overflowed. The buffer overflow vulnerabilities may
    be exploited through setuid and setgid programs that link libX11 to
    increase privileges, including root privileges.

4.  List of Patches

    The vulnerabilities in libX11 are fixed by the following patches:

    OS version          Patch ID
    __________          ________
    SunOS 5.5.1         103566-21
    SunOS 5.5.1_x86     104241-03
    SunOS 5.5           103210-21
    SunOS 5.5_x86       104242-02
    SunOS 5.4           102057-41
    SunOS 5.4_x86       103185-02
    SunOS 5.3           101362-51
    SunOS 4.1.4         100899-03
    SunOS 4.1.3_U1      100899-03

5.  Checksum Table

    The checksum table below shows the BSD checksums (SunOS 4.1.x: /bin/sum;
    SunOS 5.x: /usr/ucb/sum), SVR4 checksums (SunOS 4.1.x: /usr/5bin/sum;
    SunOS 5.x: /usr/bin/sum), and the MD5 digital signatures for the
    above-mentioned patches that are available from:

        <URL:ftp://sunsolve1.sun.com/pub/patches/patches.html>

    These checksums may not apply if you obtain patches from your answer
    centers.

File Name         BSD         SVR4         MD5
_______________   _________   __________   ________________________________
103566-21.tar.Z   58014 3555  65069 7109   9957BF7423D147E9CFAF877DF637A603
104241-03.tar.Z   11512 1450  52051 2899   C33B8EFD96A7BD22E07582E3C575669D
103210-21.tar.Z   13372 3651  11073 7301   619130609DBE46F7FFECAE89631E3A52
104242-02.tar.Z   55147 1415  30132 2830   83988AADB844139C744D3B81D4B2774F
102057-41.tar.Z   55014 2668  32935 5335   FDE4A6372ACA7CFD62F22DE4F424DEB2
103185-02.tar.Z   59698 1010  62623 2019   23B70F3AEBD6F0462053042FFC29E806
101362-51.tar.Z   26563 6475  50012 12949  B1F06E68F57745CC27328CFB88273349
100899-03.tar.Z   58461 417   51033 833    08C7D7AFFDE39C809F540BD907AA660B
_______________________________________________________________________________
Sun acknowledges with thanks Marko Laakso (University of Oulu, Finland)
for his assistance in the preparation of this bulletin.
_______________________________________________________________________________
APPENDICES

A.  Patches listed in this bulletin are available to all Sun customers via
    World Wide Web at:

        <URL:ftp://sunsolve1.sun.com/pub/patches/patches.html>

    Customers with Sun support contracts can also obtain patches from local
    Sun answer centers and SunSITEs worldwide.

B.  Sun security bulletins are available via World Wide Web at:

        <URL:http://sunsolve1.sun.com/sunsolve/secbulletins>

C.  Sun Security Coordination Team's PGP key is available via World Wide Web
    at:

        <URL:http://sunsolve1.sun.com/sunsolve/secbulletins/SunSCkey.txt>

D.  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
        - Sun Security Coordination Team. Send email to:

                security-alert () sun com

E.  To receive information or subscribe to our CWS (Customer Warning System)
    mailing list, send email to:

                security-alert () sun com

    with a subject line (not body) containing one of the following commands:

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                        Team's PGP key

        send topic      A short status summary or bulletin. For example, to
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                                send #138

        subscribe       Sender is added to our mailing list.  To subscribe,
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________________________________________________________________________________



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