Taking down the internet
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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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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

  • Exploits a buffer overflow in MS SQL Server

  • Spreads by sending itself to UDP port 1434 at random IP addresses


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


Sample SMTP session

ClientServer

(connects to TCP port 25) 220 SMTP ready

HELO mydomain.net 250 Welcome

MAIL FROM:<[email protected]> 250 Sender OK

RCPT TO:<[email protected]> 250 Recipient OK

DATA 354 Send the data

(message content) . 250 Accepted for delivery

QUIT 221 Bye


Typical daily @mm chart


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


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)


CodeRed.c (aka CodeRed II)


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


Slammer hits per hour


Slammer hits per minute


Slammer hits per 10 seconds


Slammer: First 5 minutes


Slammer: First 5 minutes


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.


Slammer: First 5 minutes


The WildList Asia

Source: WildList Org.


The WildListIsrael

Source: WildList Org.


The WildListIndia

Source: WildList Org.


The WildList Japan - Seiji Murakami (IPA)

Source: WildList Org.


The WildListKorea

Source: WildList Org.


The WildList Australia

Source: WildList Org.


The WildList Asia

Source: WildList Org.


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