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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 INTERNET THREAT UPDATE for 03-14-2002 ISS X-Force Internet Threat Intelligence Center www.iss.net - Click on AlertCon logo for more information. ******************************************** ALERTCON 1 Projected: AlertCon 1 ******************************************** ALERTCON 1 - AlertCon 1 reflects the malicious, determined, global, 24 x 7 attacks experienced by all networks. LINUX: A buffer overflow in a library common to all Linux systems could cause a serious security hole that would let those systems be remotely attacked and taken over. The flaw is in a system library called zlib, used for file decompression in the Linux kernel--so it affects all Linux distributions. OpenSSH: Versions 2.0-3.0.2 have a vulnerability in previous existing user accounts. This could allow root access. An ssh server compromised by an attack could use this exploit against connecting vulnerable clients. VIRUSES/WORMS: WORM_FBOUND.B This worm mass-mails itself to all email addresses listed in the infected user's Windows Address Book (WAB). It arrives in an email with a subject that it randomly selects from a group of Japanese language phrases if the email address of the recipient ends with .jp. Otherwise, the subject is "Important." The name of the attachment it arrives with is PATCH.EXE. ******************************************** RECOMMENDATIONS ******************************************** With respect to zlib, although no exploits for this issue or these packages are currently known to exist, this is a serious vulnerability that could be locally or remotely exploited. All users should upgrade affected packages immediately. http://www.gzip.org/zlib With respect to the OpenSSH vulnerability, ISS X-Force recommends that you upgrade to version 3.1 or apply the patch: <http://www.openssh.com> For information on the FBOUND.B worm, please see: <http://www.antivirus.com/vinfo/virusencyclo/default5.asp?VName=WORM_F BOUND.B> Information regarding viruses and worms please see: <https://gtoc.iss.net/viruses.php> ******************************************** ATTACK SIGNATURE RANKING - global IDS, midnight - midnight, previous Day, % of total ******************************************** Protocol Decode 34.41% Unauthorized Access Attempt 32.31% Suspicious Activity 20.49% Denial Of Service 08.75% Pre-Attack Probe 04.03% Back Door 00.02% ******************************************** TOP TEN ATTACK DESTINATION PORTS - global IDS, midnight - midnight, previous day, % of top ten (ports found at) http://www.networkice.com/Advice/Exploits/Ports/default.htm ******************************************** 80 (http) 59.39% 161 (SNMP) 15.99% 23 (telnet) 07.09% 21 (ftp) 07.06% 25 (smtp) 06.39% 162 (SNMPTrap) 01.63% 22 (ssh) 00.78% 443 (ssl) 00.57% 1500 (vlsi-lm) 00.57% 139 (NetBIOS) 00.52% ******************************************** BACKGROUND, COPYRIGHT NOTICE, and DISCLAIMER ******************************************** Background. We provide this information in the spirit of PDD 63 to help security professionals wage the war against Internet threats more effectively. Information in this update derived primarily from global, real time, 24 x 7 IDS feeds, ISS X-Force R&D Team research, and professional liaison. Other sources as noted. AlertCon 1 reflects the global, malicious, determined, 24 x 7 attacks experienced by all networks. AlertCon 2 means increased vigilance/action recommended due to a specific threat or concern. AlertCon 3 means increased attacks against specific targets or vulnerabilities on a scale that is unusually high, action required. AlertCon 4 reflects an Internet emergency for a target or group of targets whose business continuity may depend on some sort of immediate, decisive action. All summaries cover 24 hours the previous workday, GMT. Monday summaries may cover some weekend activity. Copyright 2001 Internet Security Systems, Inc. Permission is granted for the redistribution of the Internet Threat Update electronically. It is not to be sold or edited in any way without express consent of ISS. Refer comments or questions to: [EMAIL PROTECTED] or [EMAIL PROTECTED] Disclaimer: This information is subject to change without notice. Use of this information constitutes acceptance for use in an 'as is' condition. There are no warranties with regard to this information. In no event shall the author be liable for any damages whatsoever arising out of or in connection with the use or spread of this information. Any use of this information is at the user's own risk. No other use authorized. FOIA Exemption 4. You can download the public key from MIT's PGP key server and PGP.com's key server. Patrick Gray Manager, X-Force Internet Threat Intelligence Center Internet Security Systems 6303 Barfield Road Atlanta, GA 30328 -----BEGIN PGP SIGNATURE----- Version: PGP 7.0 iQA/AwUBPJC9aJG41ROSQPncEQLQjQCgw5t7NkBtxtrWfeijVsdY7aWU3GwAoJZ7 QrA3ytv7PbdchvrIP6GFCAGq =kiuG -----END PGP SIGNATURE-----
