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AUSCERT External Security Bulletin Redistribution
ESB-2001.542 -- Sun Security Bulletin #00213
login
18 December 2001
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AusCERT Security Bulletin Summary
---------------------------------
Product: /bin/login
Vendor: Sun Microsystems
Operating System: SunOS 5.8 (Solaris 8)
SunOS 5.7 (Solaris 7)
SunOS 5.6 (Solaris 2.6)
SunOS 5.5.1 (Solaris 2.5.1)
Platform: i386
SPARC
Impact: Root Compromise
Access Required: Remote
Ref: AL-2001.19
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________________________________________________________________________________
Sun Microsystems, Inc. Security Bulletin
Bulletin Number: #00213
Date: December 14, 2001
Cross-Ref: CERT Advisory CA-2001-34
Title: login
________________________________________________________________________________
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, 2.6,
and 2.5.1 (SunOS(tm) 5.8, 5.7, 5.6, and 5.5.1) which
relate to a buffer overflow vulnerability in /bin/login.
Sun recommends that you install the patches listed in section 4
immediately on systems running SunOS 5.8, 5.7, 5.6, and 5.5.1.
2. Who is Affected
Vulnerable: SunOS 5.8, 5.8_x86, 5.7, 5.7_x86, 5.6,
5.6_x86, 5.5.1, and 5.5.1_x86
3. Understanding the Vulnerability
The login command is used at the beginning of each terminal
session to identify oneself to the system. login is invoked
by the system when a connection is first established, after
the previous user has terminated the login shell by issuing
the exit command.
A buffer overflow has been discovered in login which may be
exploited by a local or a remote attacker to gain root access
on the affected system. This issue was discovered by ISS
X-Force who published an advisory at:
http://xforce.iss.net/alerts/advise105.php
CERT Advisory CA-2001-34 is available from:
http://www.cert.org/advisories/CA-2001-34.html
4. List of Patches
A Sun Security Bulletin is usually issued after patches are
available on SunSolve. In this case, while the patches are
not yet available, they are in the process of being pushed
to external servers and should be downloadable in a very
short time.
OS Version Patch ID
__________ _________
SunOS 5.8 111085-02
SunOS 5.8_x86 111086-02
SunOS 5.7 112300-01
SunOS 5.7_x86 112301-01
SunOS 5.6 105665-04
SunOS 5.6_x86 105666-04
SunOS 5.5.1 106160-02
SunOS 5.5.1_x86 106161-02
______________________________________________________________________________
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)
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security-alert@sun.com
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Command Information Returned/Action Taken
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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.
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