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Taking Down the Internet

Taking Down the Internet. Dmitry O. Gryaznov, Sr. Research Architect. Date: Sat, 25 Jan 2003 05:34:07 GMT. South Korea “disappears” Troubles with U.S. ATMs and flights ticketing General Internet slowdown: up to 20% of IP packets lost. W32/SQLSlammer. Only 376 bytes long

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Taking Down the Internet

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  1. Taking Down the Internet Dmitry O. Gryaznov, Sr. Research Architect

  2. Date: Sat, 25 Jan 2003 05:34:07 GMT • South Korea “disappears” • Troubles with U.S. ATMs and flights ticketing • General Internet slowdown: up to 20% of IP packets lost

  3. W32/SQLSlammer • Only 376 bytes long • Exploits a buffer overflow in MS SQL Server • Spreads by sending itself to UDP port 1434 at random IP addresses

  4. Mass-mailing viruses • Send thousands of copies by E-mail • Can affect mailservers badly • Need to connect to a mailserver and follow a mail protocol • Require a user

  5. Sample SMTP session Client Server (connects to TCP port 25) 220 SMTP ready HELO mydomain.net 250 Welcome MAIL FROM:<me@mydomain.net> 250 Sender OK RCPT TO:<you@yourdomain.net> 250 Recipient OK DATA 354 Send the data (message content) . 250 Accepted for delivery QUIT 221 Bye

  6. Typical daily @mm chart

  7. CodeRed and likes • Exploit vulnerabilities in TCP servers (e.g. a buffer overflow in MS IIS) • Need to connect to a server and follow a protocol (e.g. HTTP) • Do NOT require a user • Do not affect the Internet noticeably

  8. Sample HTTP session Client Server (connects to TCP port 80) GET /us/index.asp HTTP/1.0Host: www.somewhere.net HTTP/1.1 200 OK Server: Microsoft-IIS/5.0 Last-Modified: Tue, 23 Sep 2003 00:41:05 GMT Content-Length: 43585 Content-Type: text/html Connection: close (43585 bytes of data)

  9. CodeRed.c (aka CodeRed II)

  10. Slammer • Connectionless UDP, “shoot and forget” • A single infected PC exhausts 100Mbps bandwidth – over 30,000 “shots” per second; could attack each and every computer on the Internet in less than a day • Much faster in reality – “chain reaction”; took 10-15 minutes to reach its saturation level at 100-200 thousand infected computers worldwide

  11. Slammer hits per hour

  12. Slammer hits per minute

  13. Slammer hits per 10 seconds

  14. Slammer: First 5 minutes

  15. Slammer: First 5 minutes

  16. Is it possible to take down the Internet? • 100-200 thousand Slammer-infected computers – 20% IP packets lost • 1,000,000 computers - ? • 580,000,000 Internet users worldwide • Over 14,000 different “backdoors” in Usenet in May-June 2003; millions of readers • IRC, P2P, etc.

  17. Slammer: First 5 minutes

  18. The WildList Asia Source: WildList Org.

  19. The WildListIsrael Source: WildList Org.

  20. The WildListIndia Source: WildList Org.

  21. The WildList Japan - Seiji Murakami (IPA) Source: WildList Org.

  22. The WildListKorea Source: WildList Org.

  23. The WildList Australia Source: WildList Org.

  24. The WildList Asia Source: WildList Org.

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