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Revision Date Username Comment
821 Dec 2014 - 14:20ThomasMisa 
722 Jul 2014 - 17:28ThomasMisa 
625 Feb 2014 - 10:11norqu036? 
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422 Jan 2014 - 19:46norqu036? 
328 Oct 2013 - 19:30ThomasMisa(minor)  
208 Oct 2013 - 10:16norqu036? 
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SQL Slammer Worm

The SQL Slammer worm (also called the Sapphire Worm) is a computer worm known for the speed with which it spread after first being released at 5:30 UTC on January 25, 2003. Within ten minutes, the worm infected more than 75,000 hosts, about ninety percent of all those vulnerable. Though the worm contained no malicious payload, its rapid propagation caused network overloads and disabled database servers. By the morning after its release, 13,000 Bank of America ATMs were offline, the Continental Airlines was forced to use manual check-in, and Internet trading on the South Korean stock market was heavily reduced. Because it spread too quickly for any human-based response, SQL Slammer drove home the necessity of automated forms of security to combat such attacks.(1)(2)

SQL Slammer is a small piece of code, only 376 bytes of data, and infects the Microsoft SQLServer 2000 host. The worm does not actively seek to damage its host, and makes no attempt at inspecting or modifying files, nor at interfering with program execution on the infected server. Instead, the worm focuses solely on its own propagation by generating random IP addresses and sending User Datagram Protocol (UDP) packets from its host to each address. The worm exploits a buffer overflow vulnerability in the SQLServer 2000 software. Microsoft released a patch to fix the vulnerability six months earlier, but many servers had not yet installed it at the time of the worm's release. Had the worm contained a malicious payload, its effects would have been farm more severe.(3)(4)

Notes

1 , 3 : http://cacm.acm.org/magazines/2003/4/6862-on-sapphire-and-type-safe-languages/fulltext

2 , 4 : http://www.computer.org/csdl/mags/sp/2003/04/j4033-abs.html


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