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__________________________________________________________
The U.S. Department of Energy
Computer Incident Advisory Capability
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INFORMATION BULLETIN
SUN ftpd Vulnerability
June 17, 1998 15:00 GMT Number I-059
______________________________________________________________________________
PROBLEM: A vulnerability has been identified in the in.ftpd daemon.
PLATFORM: Solaris 2.6, 2.5.1, 2.5, 2.3 and SunOS 5.6, 5.5.1, 5.5, 5.3.
DAMAGE: The vulnerability may be exploited to launch a denial of
service attack against the ftp server.
SOLUTION: Install the patches listed below.
______________________________________________________________________________
VULNERABILITY Sun strongly recommends that you install the patches listed in
ASSESSMENT: section 4 immediately on systems running SunOS 5.6, 5.5.1, 5.5,
and 5.3 which use in.ftpd.
______________________________________________________________________________
[ Start Sun Microsystems Advisory ]
______________________________________________________________________________
Sun Microsystems, Inc. Security Bulletin
Bulletin Number:#00171
Date: June 10, 1998
Cross-Ref:
Title: ftpd
______________________________________________________________________________
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
and 2.3 (SunOS(tm) 5.6, 5.5.1, 5.5 and 5.3), which relate to a
vulnerability in ftpd.
Sun estimates that the release of patches for Solaris 2.4 (SunOS 5.4)
that relate to the same vulnerability will be available within 6 weeks
of the date of this bulletin.
Sun strongly recommends that you install the patches listed in section 4
immediately on systems running SunOS 5.6, 5.6_x86, 5.5.1, 5.5, and 5.3
which use in.ftpd.
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
The in.ftpd daemon is the Internet File Transfer Protocol (FTP) server
process. The server is invoked by the Internet daemon inetd each time
a connection to the FTP service is made. A vulnerability has been
discovered which could be exploited to launch an denial of service
attack against the ftp server.
4. List of Patches
The following patches are available in relation to the above problem.
SunOS Patch ID
_____ _________
SunOS 5.6 106301-01
SunOS 5.6_x86 106302-01
SunOS 5.5.1 103603-08
SunOS 5.5.1_x86 103604-08
SunOS 5.5 103577-08
SunOS 5.5_x86 103578-08
SunOS 5.4 101945-59 (to be released in 6 weeks)
SunOS 5.4_x86 101946-52 (to be released in 6 weeks)
SunOS 5.3 104938-02
______________________________________________________________________________
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/pub-cgi/secbul.pl>
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
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- Your local Sun answer centers
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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 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
Institutes of Health (NIH). CIAC is located at the Lawrence Livermore
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CIAC services are available to DOE, DOE contractors, and the NIH. CIAC
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For emergencies and off-hour assistance, DOE, DOE contractor sites,
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