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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 INTERNET RISK UPDATE for 05-30-2002 ISS X-Force Internet Threat Intelligence Center www.iss.net - Click on the AlertCon logo for more information. ******************************************** ALERTCON 1 Projected: AlertCon 1 ******************************************** ALERTCON 1 - We are at AlertCon 1, the usual chaotic state of the Internet. Vulnerabilities: There is a flaw in the way Exchange 2000 handles certain malformed RFC message attributes on received mail. Upon receiving a message containing such a malformation, the flaw causes the Store service to consume 100% of the available CPU in processing the message. A security vulnerability results because it is possible for an attacker to seek to exploit this flaw and mount a denial of service attack. An attacker could attempt to levy an attack by connecting directly to the Exchange server and passing a raw, handcrafted mail message with a specially malformed attribute. When the message was received and processed by the Store service, the CPU would spike to 100%. The effects of the attack would last as long as it took for the Exchange Store service to process the message. Neither restarting the service nor rebooting the server would remedy the denial of service. VIRUSES/WORMS: MS SQL Worm: We continue to observe a strong presence of this worm. An analysis confirms that there are two separate worms with distinctively different data packages actively propagating via port 1433. Once a system is compromised by using the default administrator settings in SQL Server 7.0 and 2000, it adds a temporary account to the local group administrator's list and then executes a Java Script using a third party e-mail program which sends a password file and then the victims network configuration settings to [EMAIL PROTECTED] ******************************************** RECOMMENDATIONS For information on the Microsoft advisory, please refer to: http://www.microsoft.com/technet/treeview/default. asp?url=/technet/security/bulletin/MS02-025.asp> For a list of current vulnerabilities, please see: https://gtoc.iss.net/vulnerabilities.php For information on the MY SQL Worm, please refer to: http://www.antivirus.com/vinfo/virusencyclo/defaul t5.asp?VName=BAT_SQLSPIDA.B Information regarding viruses and worms please see: https://gtoc.iss.net/viruses.php ******************************************** FACTOID: South African authorities report arresting six individuals in connection with the Nigerian e-mail scams. We applaud the South Africans for hopefully ridding us of these particular scams. ******************************************** ATTACK SIGNATURE RANKING - global IDS, midnight - midnight, previous Day, % of total ******************************************** Protocol Decode 47.25% Suspicious Activity 21.02% Denial Of Service 15.47% Unauthorized Access Attempt 13.28% Pre-Attack Probe 02.95% Back Door 00.03% ******************************************** TOP TEN ATTACK DESTINATION PORTS - global IDS, midnight - midnight, previous day, % of top ten (ports found at) http://www.neohapsis.com/neolabs/neo-ports/neo-por ts.html ******************************************** 80 (http) 71.25% 1433 (SQL) 11.03% 23 (telnet) 06.70% 25 (smtp) 03.83% 161 (SNMP) 02.63% 1214 (KAZAA) 01.34% 69 (tftp) 01.17% 53 (DNS) 00.86% 21 (ftp) 00.61% 139 (NetBIOS) 00.58% ******************************************** 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 2002 Internet Security Systems, Inc. Permission is granted for the redistribution of the Internet Risk 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 7.0.4 iQA/AwUBPPZFIpG41ROSQPncEQL5JwCdG9a66f1p8xFTLeDkNTbZq62ZTTUAoJ2V 8ITQfgWWtSFw4WeEvCe99nhO =K3/2 -----END PGP SIGNATURE-----
