TUCoPS :: SunOS/Solaris :: ciaci048.txt

SunOS Mountd Vulnerability

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             __________________________________________________________

                       The U.S. Department of Energy
                    Computer Incident Advisory Capability
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             __________________________________________________________

                             INFORMATION BULLETIN

                           SunOS mountd Vulnerability

April 29, 1998 21:00 GMT                                          Number I-048
______________________________________________________________________________
PROBLEM:       A vulnerability has been identified in mountd, an RPC server
               that handles the NFS file system mount requests.
PLATFORM:      SunOS 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.
DAMAGE:        If exploited, this vulnerability may allow an attacker to
               obtain information about any file that exists on the NFS server
               even though the file in question is not a part of the NFS
               exported file system.
SOLUTION:      Apply patches listed below in Section 4.
______________________________________________________________________________
VULNERABILITY  Sun Microsystems HIGHLY recommends that the patches be applied
ASSESSMENT:    as soon as possible.
______________________________________________________________________________

[  Start Sun Microsystems Advisory..]

______________________________________________________________________________
                   Sun Microsystems, Inc. Security Bulletin
               
Bulletin Number:#00168
Date:           April 29, 1998
Cross-Ref:             
Title:          mountd
______________________________________________________________________________

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______________________________________________________________________________

1.  Bulletins Topics

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

    Sun recommends that you install the patches listed in section 4
    immediately on systems running SunOS 5.6, 5.5.1, 5.5, 5.4, and 5.3.
   
2.  Who is Affected
       
    Vulnerable:  SunOS 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

    mountd is an RPC server that handles NFS file system mount requests. 
    A vulnerability has been discovered with mountd which, if exploited,
    allows the attacker to obtain information about any file that exists
    on the NFS server even though the file in question is not a part of
    the NFS exported file system.
       
4.  List of Patches

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

    SunOS               Patch ID       
    _____               _________

    SunOS 5.6           105615-03              
    SunOS 5.6_x86       105616-03
    SunOS 5.5.1         104220-03
    SunOS 5.5.1_x86     104221-03
    SunOS 5.5           104223-02
    SunOS 5.5_x86       104224-02
    SunOS 5.4           102685-02
    SunOS 5.4_x86       102686-02
    SunOS 5.3           102654-02
   
______________________________________________________________________________
APPENDICES

A.  Patches listed in this bulletin are available to all Sun customers via
    World Wide Web at:
   
        <URL:http://sunsolve.sun.com/sunsolve/pubpatches/patches.html>

B.  Checksums for the patches listed in this bulletin are available via
    World Wide Web at:

        <URL:http://sunsolve.sun.com/sunsolve/pubpatches/patches.html>

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

        <URL:http://sunsolve.sun.com/sunsolve/secbulletins>
       
D.  Sun Security Coordination Team's PGP key is available via World Wide Web
    at:

        <URL:http://sunsolve.sun.com/sunsolve/secbulletins/SunSCkey.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
        - Sun Security Coordination Team. Send email to:
        
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Copyright 1998 Sun Microsystems, Inc. All rights reserved. Sun,
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[  End Sun Microsystems Advisory..]

______________________________________________________________________________

CIAC wishes to acknowledge the contributions of Sun Microsystems, Inc. for the
information contained in this bulletin.
______________________________________________________________________________


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