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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 INTERNET THREAT UPDATE for 03-28-2002 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. TELNET: We have received recent reports that a new exploit for the telnet daemon on the Linux platform is circulating. The exploit purports to be a remote root exploit for Linux. CISCO: The CallManager, which is a Cisco proprietary application, running version 3.1 has a memory leak in the CTI (Call Telephony Integration) that may allow an attacker to crash the server by initiating a Denial of Service (DoS) attack. VIRUSES/WORMS: WORM_CERVIVEC.A propagates by sending a copy of itself to all of the infected user's ICQ contacts. Its non-destructive payload displays worm-like lines in the screen of the infected system. ******************************************** RECOMMENDATIONS ******************************************** Telnet: We would re-iterate to network administrators to block port 23 from externally facing networks and use up to date versions of the more secure SSH transport for remote administration of Linux and Unix. For the Cisco Advisory, please see: http://www.cisco.com/warp/public/707/callmanager-ctifw-leak-pub.shtml For information regarding the WORM_CERVIVEC.A please see: <http://www.antivirus.com/vinfo/virusencyclo/default5.asp?VName=WORM_C ERVIVEC.A> Information regarding viruses and worms please see: <https://gtoc.iss.net/viruses.php> ******************************************** FACTOID: A Gartner Group study says it's likely that two out of five small and medium-size businesses (SMBs) that experience a disaster will go out of business within five years because they lack adequate disaster-recovery plans. Up to 65 percent of SMBs globally lack a disaster recovery and business continuity plan to deal with crises--such as industrial sabotage or fire--that can seriously disrupt service, according to the report. ******************************************** ATTACK SIGNATURE RANKING - global IDS, midnight - midnight, previous Day, % of total ******************************************** Protocol Decode 42.72% Suspicious Activity 31.72% Unauthorized Access Attempt 15.76% Denial Of Service 06.57% Pre-Attack Probe 03.22% Back Door 00.01% ******************************************** 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) 76.30% 161 (SNMP) 10.54% 21 (ftp) 05.12% 25 (smtp) 02.11% 23 (telnet) 01.68% 162 (SNMPTrap) 01.22% 139 (NetBIOS) 00.95% 22 (ssh) 00.79% 443 (ssl) 00.73% 1500 (vlsi-lm) 00.56% ******************************************** 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/AwUBPKMrVZG41ROSQPncEQLooQCg4wNu+cF45KKt2wekAKJhQRtJDhsAmgL1 Me7OXu+Q2HAWwU375HMJNhT9 =4pEm -----END PGP SIGNATURE-----
