From ciac@rumpole.llnl.gov Sat Apr 1 04:54:42 2000 From: CIAC Mail User Resent-From: mea culpa To: ciac-bulletin@rumpole.llnl.gov Resent-To: jericho@attrition.org Date: Fri, 31 Mar 2000 12:35:41 -0800 (PST) Subject: CIAC Bulletin K-032: DDOS Mediation Action List [ For Public Release ] -----BEGIN PGP SIGNED MESSAGE----- __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN DDoS Mediation Action List March 31, 2000 15:00 GMT Number K-032 ______________________________________________________________________________ PROBLEM: Distributed Denial of Service attacks have drawn attention to fundamental flaws in the present implementation of the TCP/IP stack. PLATFORM: Any Platform using the TCP/IP stack. DAMAGE: Both the intermediary and victim of this attack may suffer degraded network performance to the point of no access. SOLUTION: Apply the workarounds to help prevent, mediate the effects of, and forensics after an attack. ______________________________________________________________________________ VULNERABILITY The risk is medium. Failure to act on the recommended action ASSESSMENT: items will not lead to a compromise, but will aid in the attack's ability to go unresolved. ______________________________________________________________________________ http://www.ciac.org/ciac/bulletins/k-032.shtml 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. CIAC services are available to DOE, DOE contractors, and the NIH. CIAC can be contacted at: Voice: +1 925-422-8193 FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@llnl.gov For emergencies and off-hour assistance, DOE, DOE contractor sites, and the NIH may contact CIAC 24-hours a day. During off hours (5PM - 8AM PST), use one of the following methods to contact CIAC: 1. Call the CIAC voice number 925-422-8193 and leave a message, or 2. Call 888-449-8369 to send a Sky Page to the CIAC duty person or 3. Send e-mail to 4498369@skytel.com, or 4. Call 800-201-9288 for the CIAC Project Leader. Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ (or http://ciac.llnl.gov -- they're the same machine) Anonymous FTP: ftp.ciac.org (or ciac.llnl.gov -- they're the same machine) Modem access: +1 (925) 423-4753 (28.8K baud) +1 (925) 423-3331 (28.8K baud) PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing communities receive CIAC bulletins. If you are not part of these communities, please contact your agency's response team to report incidents. Your agency's team will coordinate with CIAC. The Forum of Incident Response and Security Teams (FIRST) is a world-wide organization. A list of FIRST member organizations and their constituencies can be obtained via WWW at http://www.first.org/. 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. LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) K-022: FreeBSD - Asmon/Ascpu Vulnerability K-023: FreeBSD - Delegate Proxy Server Vulnerability K-024: Microsoft Systems Management Server Vulnerability K-025: MySQL Password Authentication Vulnerability K-026: Microsoft SQL Server Admin Login Encryption Vulnerability K-027: Microsoft SQL Server and MSDE Malicious Query Vulnerability K-028: FreeBSD - Port Exploits for mh/nmh, Lynx, and mtr K-029: Microsoft "Registry Permissions" Vulnerability K-030: SGI - Vulnerability in the objectserver daemon K-031: Mobile Malicious Code -----BEGIN PGP SIGNATURE----- Version: 4.0 Business Edition iQCVAwUBOOUIULnzJzdsy3QZAQE8KwP9E/kZAWLz65A5dhMDKtV0/Gyzr0fQzNUk j/B8w4CG0fZVs/O7W5xlqkh+5a3tGZQuwqO4KS+GsW9BWGMeIzPz8Gz8iy2Nyk+U Viu3+GjMG+Agw38gSAm+UxyZZ6Yp7gxi/lFnmkOX1dVLqoRxCU1i7Ul4tJV3+9h7 vjlNhszfiXQ= =4VX8 -----END PGP SIGNATURE-----