__________________________________________________________
The U.S. Department of Energy
Computer Incident Advisory Center
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/ | /_\ /
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INFORMATION BULLETIN
Sun rpc.yppasswdd Security Vulnerability
[Sun Microsystems Security Bulletin #00209]
October 23, 2001 18:00 GMT Number M-008
______________________________________________________________________________
PROBLEM: A vulnerability exists in the rpc.yppasswdd daemon. This daemon
can be exploited through a buffer overflow.
PLATFORM: The following Sun operating systems are affected:
5.8
5.8_x86
5.7
5.7_x86
5.6
5.6_x86
DAMAGE: A remote or local user can obtain root access on the system.
SOLUTION: Apply the patches as specified by Sun.
______________________________________________________________________________
VULNERABILITY The risk is HIGH. This can lead to system compromise and the
ASSESSMENT: vulnerability has been publicly reported.
______________________________________________________________________________
LINKS:
CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/m-008.shtml
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[***** Start Sun Microsystems Security Bulletin #00209 *****]
________________________________________________________________________________
Sun Microsystems, Inc. Security Bulletin
Bulletin Number: #00209
Date: October 22, 2001
Cross-Ref: CERT Vulnerability Note VU#327281
Title: rpc.yppasswdd
________________________________________________________________________________
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
THIS SECURITY BULLETIN, EVEN IF SUN MICROSYSTEMS, INC. HAS BEEN ADVISED OF
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) 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:
http://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:
http://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:
http://sunsolve.sun.com/security
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
- Sun Security Coordination Team. Send email to:
security-alert@sun.com
F. 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:
Command Information Returned/Action Taken
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Note that your-email-address should be substituted
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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
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 Security Bulletin #00209 *****]
_______________________________________________________________________________
CIAC wishes to acknowledge the contributions of Sun Microsystems, Inc. for the
information contained in this bulletin.
_______________________________________________________________________________
CIAC, the Computer Incident Advisory Center, is the computer
security incident response team for the U.S. Department of Energy
(DOE) and the emergency backup response team for the National
Institutes of Health (NIH). CIAC is located at the Lawrence Livermore
National Laboratory in Livermore, California. CIAC is also a founding
member of FIRST, the Forum of Incident Response and Security Teams, a
global organization established to foster cooperation and coordination
among computer security teams worldwide.
CIAC services are available to DOE, DOE contractors, and the NIH. CIAC
can be contacted at:
Voice: +1 925-422-8193 (7x24)
FAX: +1 925-423-8002
STU-III: +1 925-423-2604
E-mail: ciac@ciac.org
Previous CIAC notices, anti-virus software, and other information are
available from the CIAC Computer Security Archive.
World Wide Web: http://www.ciac.org/
Anonymous FTP: ftp.ciac.org
PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing
communities receive CIAC bulletins. If you are not part of these
communities, please contact your agency's response team to report
incidents. Your agency's team will coordinate with CIAC. The Forum of
Incident Response and Security Teams (FIRST) is a world-wide
organization. A list of FIRST member organizations and their
constituencies can be obtained via WWW at http://www.first.org/.
This document was prepared as an account of work sponsored by an
agency of the United States Government. Neither the United States
Government nor the University of California nor any of their
employees, makes any warranty, express or implied, or assumes any
legal liability or responsibility for the accuracy, completeness, or
usefulness of any information, apparatus, product, or process
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