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Sun Microsystems, Inc. Security Bulletin
Bulletin Number: #00160
Date: December 3, 1997
Cross-Ref: CERT CA-97.18
Title: at
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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,
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If any of the above provisions are held to be in violation of applicable law,
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to the extent necessary for this disclaimer to be otherwise enforceable in
such jurisdiction.
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1. Bulletins Topics
Sun announces the release of patches for Solaris 2.5.1, 2.5, 2.4, and
2.3 (SunOS 5.5.1, 5.5, 5.4, and 5.3) which relate to a vulnerability
in the at program.
Sun strongly recommends that you install the patches listed in section 4
immediately on systems running SunOS 5.5.1, 5.5, 5.4, and 5.3.
Exploit information for this vulnerability 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
Not vulnerable: All other supported versions of SunOS.
3. Understanding the Vulnerability
The at program allows users to schedule commands to be executed at a
later time. Due to insufficient bounds checking on arguments supplied to
the at program, it is possible to overwrite the internal stack space of
the at program. As the at program is setuid root, this vulnerability may
be exploited to gain root access.
4. List of Patches
The following patches are available in relation to the above problem.
OS version Patch ID
__________ ________
SunOS 5.5.1 103690-05
SunOS 5.5.1_x86 103691-05
SunOS 5.5 103723-05
SunOS 5.5_x86 103724-05
SunOS 5.4 102693-05
SunOS 5.4_x86 102694-05
SunOS 5.3 101572-08
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Sun acknowledges with thanks CERT/CC for their assistance in this matter.
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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:
security-alert@sun.com
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________________________________________________________________________________
Copyright 1997 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
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