exploit the possibilities

sms.193.ddos

sms.193.ddos
Posted Jan 6, 2000

Sun Microsystems Advisory #193 - Distributed denial service tools.

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sms.193.ddos

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________________________________________________________________________________
Sun Microsystems, Inc. Security Bulletin

Bulletin Number: #00193
Date: January 5, 2000
Cross-Ref: CERT Advisory CA-2000-01
Title: Distributed Denial-of-Service Tools
________________________________________________________________________________

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. Background

Several Sun Microsystems customers have expressed concern about
security issues raised in the recent "SANS Flash Alert For Solaris"
message posted to several security mailing lists in the last few
days. The issues cited in the posting have also been reported by
CERT, NIPC and other key organizations.

The issues raised in these advisories and postings are not new, and
no new vulnerabilities are involved. Also, no "virus"- or
"worm"-like software is involved. Further, there is no related "Y2K"
issue. (All of these possibilities have been proposed by concerned
customers.)

Rather, the problems described in these advisories are caused by
software tools that are deliberately installed on machines which
have already been compromised. The tools may then be subsequently
used to launch denial-of-service attacks. The tools (known as
Trinoo, TFN, TFN2K, and Stacheldraht) are not capable of spreading
on their own, but do make use of already compromised hosts as
"client" machines to flood networks or targeted systems, causing
denial-of-service conditions.

Sun and other organizations, such as CERT, believe that many of the
hosts used as attack "clients" have been compromised via
exploitation of known vulnerabilities such as:

o rpc.statd port bounce
o rpc.cmsd buffer overflows
o tooltalk buffer overflows

Sun patches are currently available for each of these
vulnerabilities. (For details, see "Recommendations" section below.)
Again: the new attack methods do not exploit new vulnerabilities.

The pertinent CERT advisory is at:

http://www.cert.org/advisories/CA-2000-01.html


2. Recommendations

Sun recommends that you install all applicable security patches listed
in Sun security bulletins #00186 and #00188 to prevent exploitation of
the rpc.statd and rpc.cmsd vulnerabilities. Sun also recommends that
you keep your systems current on security patches and install all
applicable patches listed at:

http://sunsolve.sun.com/pub-cgi/show.pl?target=patches/patch-license&nav=pub-p

_______________________________________________________________________________
APPENDICES

A. Patches listed in this bulletin are available to all Sun customers at:

http://sunsolve.sun.com/pub-cgi/show.pl?target=patches/patch-license&nav=pub-patches

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/pub-cgi/secBulletin.pl

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
_______ _________________________________

help An explanation of how to get information

key Sun Security Coordination Team's PGP key

list A list of current security topics

query [topic] The email is treated as an inquiry and is forwarded to
the Security Coordination Team

report [topic] The email is treated as a security report and is
forwarded to the Security Coordination Team. Please
encrypt sensitive mail using Sun Security Coordination
Team's PGP key

send topic A short status summary or bulletin. For example, to
retrieve a Security Bulletin #00138, supply the
following in the subject line (not body):

send #138

subscribe Sender is added to our mailing list. To subscribe,
supply the following in the subject line (not body):

subscribe cws your-email-address

Note that your-email-address should be substituted
by your email address.

unsubscribe Sender is removed from the CWS mailing list.
________________________________________________________________________________

Copyright 2000 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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