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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2001.323 -- CERT Advisory Public Alert about the Code Red worm 30 July 2001 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: "Code Red" Worm Impact: Denial of Service Execute Arbitrary Code/Commands Website Defacement Access Required: Remote Ref: ESB-2001.302 ESB-2001.304 ESB-2001.322 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- We the CERT/CC, along with other organizations listed below are jointly publishing this alert about a serious threat to the Internet For Immediate Release: 3:00 PM EDT July 29, 2001 A Very Real and Present Threat to the Internet: July 31 Deadline For Action Summary: The Code Red Worm and mutations of the worm pose a continued and serious threat to Internet users. Immediate action is required to combat this threat. Users who have deployed software that is vulnerable to the worm (Microsoft IIS Versions 4.0 and 5.0) must install, if they have not done so already, a vital security patch. How Big Is The Problem? On July 19, the Code Red worm infected more than 250,000 systems in just 9 hours. The worm scans the Internet, identifies vulnerable systems, and infects these systems by installing itself. Each newly installed worm joins all the others causing the rate of scanning to grow rapidly. This uncontrolled growth in scanning directly decreases the speed of the Internet and can cause sporadic but widespread outages among all types of systems. Code Red is likely to start spreading again on July 31st, 2001 8:00 PM EDT and has mutated so that it may be even more dangerous. This spread has the potential to disrupt business and personal use of the Internet for applications such as electronic commerce, email and entertainment. Who Must Act? Every organization or person who has Windows NT or Windows 2000 systems AND the IIS web server software may be vulnerable. IIS is installed automatically for many applications. If you are not certain, follow the instructions attached to determine whether you are running IIS 4.0 or 5.0. If you are using Windows 95, Windows 98, or Windows Me, there is no action that you need to take in response to this alert. What To Do If You Are Vulnerable? a. To rid your machine of the current worm, reboot your computer. b. To protect your system from re-infection: Install Microsoft?s patch for the Code Red vulnerability problem: * Windows NT version 4.0: http://www.microsoft.com/Downloads/Release.asp?ReleaseID=30833 * Windows 2000 Professional, Server and Advanced Server: http://www.microsoft.com/Downloads/Release.asp?ReleaseID=30800 Step-by-step instructions for these actions are posted at www.digitalisland.com/codered Microsoft's description of the patch and its installation, and the vulnerability it addresses is posted at: http://www.microsoft.com/technet/treeview/default.asp?url=/technet/security/bulletin/MS01-033.asp Because of the importance of this threat, this alert is being made jointly by: Microsoft The National Infrastructure Protection Center Federal Computer Incident Response Center (FedCIRC) Information Technology Association of America (ITAA) CERT Coordination Center SANS Institute Internet Security Systems Internet Security Alliance - -----BEGIN PGP SIGNATURE----- Version: PGP 6.5.8 iQCVAwUBO2RpCgYcfu8gsZJZAQGFrAP/TzyQ7lyshdKb7XeNNaVTFAZzO1hB1vKG CZsaPxzqF2/GMgAQJ8HNum43QBSzr+H96f/5c7Op9ac1SefzuyWs14z+BhBXr6mf Io9vClcL3h9saqV/J1Bkv0psYhhImTgLvAWZIYneYMuvY39zjxLC2/jkKLw8dWze lcdFPH5j9vE= =3biQ - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to email@example.com and we will forward your request to the appropriate person. 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: firstname.lastname@example.org 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). 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