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fedcirc.97.26.txt

fedcirc.97.26.txt
Posted Sep 23, 1999

fedcirc.97.26.txt

SHA-256 | 84ec5d9711bf26ef8a5660ea6cd9da9385421e25a42d0c13feea0e7384cfa9bb

fedcirc.97.26.txt

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A D V I S O R Y

97.26
******************************************************************************
Topic: CERT* Summary CS-97.04 - SPECIAL EDITION
Source: CERT/CC

Creation Date: August 4, 1997
Last Updated:


To aid in the wide distribution of essential security information, FedCIRC is
forwarding the following information from CERT/CC Summary CS-97.04. FedCIRC
urges you to act on this information as soon as possible.

If you have any questions, please contact FedCIRC:

Telephone: +1 888 282 0870
Email: fedcirc@fedcirc.gov



=======================FORWARDED TEXT STARTS HERE============================

-----BEGIN PGP SIGNED MESSAGE-----

- ---------------------------------------------------------------------------
CERT* Summary CS-97.04 - SPECIAL EDITION
August 4, 1997

This special edition of the CERT Summary highlights large-scale attacks
involving a vulnerability in certain implementations of IMAP. This
vulnerability and corrective actions are described in

ftp://info.cert.org/pub/cert_advisories/CA-97.09.imap_pop

Because attacks have been occurring since the release of this advisory, we
urge you to take immediate action to address this vulnerability.

The vulnerability lies in the implementation of this particular IMAP server,
not with the protocol.

Preliminary data from one current incident indicates that probes were made to
thousands of hosts, and approximately 40% of those hosts appear to be
vulnerable. In addition to this large incident, we have been receiving
numerous reports of root compromises as a result of this vulnerability.

If you discover that your site has been probed for this vulnerability, we
encourage you to check your systems for signs of compromise using our Intruder
Detection Checklist, available at

ftp://info.cert.org/pub/tech_tips/intruder_detection_checklist

This document will help you methodically check your systems for signs of
compromise and offers pointers to other resources and suggestions on how to
proceed in the event of a compromise.

On one machine where large-scale scans were launched, the intruders installed
a Trojan Horse identd server. This Trojan identd allowed intruders to connect
to the identd server and obtain root access. If you are running identd, we
encourage you to verify the integrity of your identd executable with the
distribution.

If you discover that you have suffered a root compromise as a result, we
encourage you to recover by taking the steps outlined in

ftp://info.cert.org/pub/tech_tips/root_compromise

This will help you recover from the incident, and offers pointers to other
resources that may help you secure your systems against future compromise.

If, during the course of your investigation, you discover evidence indicating
that other sites are involved, we encourage you to contact those sites
directly and to include cert@cert.org on the CC line of any messages you
exchange.

If you are represented by another incident response team in the Forum of
Incident Response and Security Teams (FIRST), we encourage you to follow up
with that team. More information about FIRST can be found at

http://www.first.org/

Due to the large volume of messages we anticipate, we will not be able to
respond to each report individually. However, your reports will help us
determine the scope of the problem and coordinate activity in response.

Past CERT Summaries are available from
ftp://info.cert.org/pub/cert_summaries/

- ---------------------------------------------------------------------------
How to Contact the CERT Coordination Center

Email cert@cert.org

Phone +1 412-268-7090 (24-hour hotline)
CERT personnel answer 8:30-5:00 p.m. EST
(GMT-5)/EDT(GMT-4), and are on call for
emergencies during other hours.

Fax +1 412-268-6989

Postal address
CERT Coordination Center
Software Engineering Institute
Carnegie Mellon University
Pittsburgh PA 15213-3890
USA

To be added to our mailing list for CERT advisories and bulletins, send your
email address to
cert-advisory-request@cert.org
In the subject line, type
SUBSCRIBE your-email-address

CERT advisories and bulletins are posted on the USENET news group
comp.security.announce

CERT publications, information about FIRST representatives, and other
security-related information are available for anonymous FTP from
http://www.cert.org/
ftp://info.cert.org/pub/

If you wish to send sensitive incident or vulnerability information to CERT
staff by electronic mail, we strongly advise you to encrypt your message.
We can support a shared DES key or PGP. Contact the CERT staff for more
information.

Location of CERT PGP key
ftp://info.cert.org/pub/CERT_PGP.key

- ---------------------------------------------------------------------------
Copyright 1997 Carnegie Mellon University
This material may be reproduced and distributed without permission provided
it is used for noncommercial purposes and credit is given to the CERT
Coordination Center.

* Registered U.S. Patent and Trademark Office.

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========================FORWARDED TEXT ENDS HERE=============================

The National Institute of Standards and Technology (NIST) has
established a Federal Computer Incident response Capability (FedCIRC)
to assist federal civilians agencies in their incident handling
efforts by providing proactive and reactive computer security related
services. FedCIRC is a partnership among NIST, the Computer Incident
Advisory Capability (CIAC), and the CERT* Coordination Center
(CERT/CC).

If you believe that your system has been compromised, please contact
FedCIRC:

Telephone: +1 888 282 0870
Email: fedcirc@fedcirc.gov
Web Server: http://www.fedcirc.gov/

* Registered in U.S. Patent and Trademark Office

The CERT Coordination Center is part of the Software Engineering
Institute. The Software Engineering Institute is sponsored by the
U.S. Department of Defense.

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
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.

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
disclosed, or represents that its use would not infringe privately
owned rights. Reference herein to any specific commercial products,
process, or service by trade name, trademark, manufacturer, or
otherwise, does not necessarily constitute or imply its endorsement,
recommendation or favoring by the United States Government or the
University of California. The views and opinions of authors expressed
herein do not necessarily state or reflect those of the United States
Government or the University of California, and shall not be used for
advertising or product endorsement purposes.
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