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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
______________________________________________________________________________
The information contained in this Security Bulletin is provided "AS IS."
Sun makes no warranties of any kind whatsoever with respect to the information
contained in this Security Bulletin. ALL EXPRESS OR IMPLIED CONDITIONS,
REPRESENTATIONS AND WARRANTIES, INCLUDING ANY WARRANTY OF NON-INFRINGEMENT OR
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE
HEREBY DISCLAIMED AND EXCLUDED TO THE EXTENT ALLOWED BY APPLICABLE LAW.
IN NO EVENT WILL SUN MICROSYSTEMS, INC. BE LIABLE FOR ANY LOST REVENUE,
PROFIT OR DATA, OR FOR DIRECT, SPECIAL, INDIRECT, CONSEQUENTIAL, INCIDENTAL
OR PUNITIVE DAMAGES HOWEVER CAUSED AND REGARDLESS OF ANY THEORY OF LIABILITY
ARISING OUT OF THE USE OF OR INABILITY TO USE THE INFORMATION CONTAINED IN
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THE POSSIBILITY OF SUCH DAMAGES.
If any of the above provisions are held to be in violation of applicable law,
void, or unenforceable in any jurisdiction, then such provisions are waived
to the extent necessary for this disclaimer to be otherwise enforceable in
such jurisdiction.
______________________________________________________________________________
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
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security-alert@sun.com
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______________________________________________________________________________
Copyright 1998 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
Security Bulletin is not modified in any way and is attributed to
Sun Microsystems, Inc. and provided that such reproduction and distribution
is performed for non-commercial purposes.
[ End Sun Microsystems Advisory..]
______________________________________________________________________________
CIAC wishes to acknowledge the contributions of Sun Microsystems, Inc. for the
information contained in this bulletin.
______________________________________________________________________________
CIAC, the Computer Incident Advisory Capability, is the computer
security incident response team for the U.S. Department of Energy
(DOE) and the emergency backup response team for the National
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