Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2000.035 -- CERT Summary CS-2000-01
CERT Summary
7 March 2000
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The CERT Coordination Centre has released the following summary concerning
types of attacks currently being reported. AusCERT has noted similar trends
reported within Australia and New Zealand.
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CERT Summary CS-2000-01
Tuesday, February 29, 2000
Each quarter, the CERT Coordination Center (CERT/CC) issues the CERT
Summary to draw attention to the types of attacks reported to our
incident response team, as well as other noteworthy incident and
vulnerability information. The summary includes pointers to sources of
information for dealing with the problems.
Past CERT summaries are available from
http://www.cert.org/summaries/
______________________________________________________________________
Recent Activity
Since the last regularly scheduled CERT summary, issued November 1999
(CS-99-04), we have published information on distributed
denial-of-service tools and developments. We also continue to receive
reports of intruders compromising machines by exploiting
vulnerabilities in BIND, Vixie Cron, WU-FTPD, and RPC services.
Additionally, we have published information on malicious HTML tags
embedded in client web requests.
1. Distributed Denial-of-Service Developments
We continue to receive reports of intruders compromising machines
in order to install software used for launching packet flooding
denial-of-service attacks. For more information, please see
CERT Incident Note IN-2000-01 Windows Based DDOS Agents
http://www.cert.org/incident_notes/IN-2000-01.html
CERT Advisory CA-2000-01 Denial-of-Service Developments
http://www.cert.org/advisories/CA-2000-01.html
CERT Advisory CA-99-17 Denial-of-Service Tools
http://www.cert.org/advisories/CA-99-17-denial-of-service-too
ls.html
CERT Incident Note IN-99-07 Distributed Denial of Service
Tools
http://www.cert.org/incident_notes/IN-99-07.html
Results of the Distributed-Systems Intruder Tools Workshop
http://www.cert.org/reports/dsit_workshop-final.html
2. BIND Vulnerabilities
We continue to receive reports of intruders compromising machines
by exploiting vulnerabilities in BIND. For more information,
please see
CERT Advisory CA-99-14 Multiple Vulnerabilities in BIND
http://www.cert.org/advisories/CA-99-14-bind.html
3. Multiple Vulnerabilities in Vixie Cron
Compromises involving the exploitation of several vulnerabilities
in the Vixie Cron program have recently been reported to the
CERT/CC. These vulnerabilities, including two that were first
discussed publicly in August 1999, allow local users to gain root
access. More information about these vulnerabilities, including
pointers to patch information, is available in our recently
published Vulnerability Note VN-2000-01:
CERT Vulnerability Note VN-2000-01 Multiple Vulnerabilities in
Vixie Cron
http://www.cert.org/vul_notes/VN-2000-01.html
4. Root Compromises
We continue to see root compromises as a result of vulnerabilities
in WU-FTPD, AMD, and various RPC-related services. For more
information, please see
CERT Advisory CA-99-13 Multiple Vulnerabilities in WU-FTPD
http://www.cert.org/advisories/CA-99-13-wuftpd.html
CERT Advisory CA-99-12 Buffer Overflow in amd
http://www.cert.org/advisories/CA-99-12-amd.html
CERT Incident Note 99-04 Similar Attacks Using Various RPC
Services
http://www.cert.org/incident_notes/IN-99-04.html
5. Malicious HTML Tags Embedded in Client Web Requests
The CERT/CC has published information regarding web sites that may
inadvertently include malicious HTML tags or script in a
dynamically generated page based on unvalidated input from
untrustworthy sources. For more information, please see
CERT Advisory CA-2000-02 Malicious HTML Tags Embedded in Client
Web Requests
http://www.cert.org/advisories/CA-2000-02.html
______________________________________________________________________
"CERT/CC Current Activity" Web Page
The CERT/CC Current Activity web page is a regularly updated summary
of the most frequent, high-impact types of security incidents and
vulnerabilities currently being reported to the CERT/CC. It is
available from
http://www.cert.org/current/current_activity.html
The information on the Current Activity page is reviewed and updated
as reporting trends change.
______________________________________________________________________
Year 2000 (Y2K) Information
We continue to regularly update reports on our web site to inform the
community of activity being reported to us by other response teams and
sites. We will continue to update these reports through February 29,
"leap day." For more information, please see
CERT/CC and FedCIRC Year 2000 (Y2K) Status Reports
http://www.cert.org/y2k-info/y2k-status.html
Potential Computer Behavior on February 29, 2000
http://www.cert.org/y2k-info/leapyear_est.html
______________________________________________________________________
What's New and Updated
Since the last CERT summary, we have developed new and updated
* Advisories
* CERT statistics
* Incident notes
* Tech tips/FAQs
* Y2K information
* Announcements of Training Courses
* CERT/CC annual report
* Copies of Congressional testimony by our staff
There are descriptions of these documents and links to them on our
"What's New" web page at
http://www.cert.org/nav/whatsnew.html
______________________________________________________________________
This document is available from:
http://www.cert.org/summaries/CS-2000-01.html
______________________________________________________________________
CERT/CC Contact Information
Email: cert@cert.org
Phone: +1 412-268-7090 (24-hour hotline)
Fax: +1 412-268-6989
Postal address:
CERT Coordination Center
Software Engineering Institute
Carnegie Mellon University
Pittsburgh PA 15213-3890
U.S.A.
CERT personnel answer the hotline 08:00-20:00 EST(GMT-5) / EDT(GMT-4)
Monday through Friday; they are on call for emergencies during other
hours, on U.S. holidays, and on weekends.
Using encryption
We strongly urge you to encrypt sensitive information sent by email.
Our public PGP key is available from
http://www.cert.org/CERT_PGP.key
If you prefer to use DES, please call the CERT hotline for more
information.
Getting security information
CERT publications and other security information are available from
our web site
http://www.cert.org/
To be added to our mailing list for advisories and bulletins, send
email to cert-advisory-request@cert.org and include SUBSCRIBE
your-email-address in the subject of your message.
Copyright 1999 Carnegie Mellon University.
Conditions for use, disclaimers, and sponsorship information can be
found in
http://www.cert.org/legal_stuff.html
* "CERT" and "CERT Coordination Center" are registered in the U.S.
Patent and Trademark Office.
______________________________________________________________________
NO WARRANTY
Any material furnished by Carnegie Mellon University and the Software
Engineering Institute is furnished on an "as is" basis. Carnegie
Mellon University makes no warranties of any kind, either expressed or
implied as to any matter including, but not limited to, warranty of
fitness for a particular purpose or merchantability, exclusivity or
results obtained from use of the material. Carnegie Mellon University
does not make any warranty of any kind with respect to freedom from
patent, trademark, or copyright infringement.
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This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to use any or all of this information is
the responsibility of each user or organisation, and should be done so in
accordance with site policies and procedures.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the original authors to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
http://www.auscert.org.au/Information/advisories.html
If you believe that your system has been compromised, contact AusCERT or
your representative in FIRST (Forum of Incident Response and Security
Teams).
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for emergencies.
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