[Date Prev] [Date Next] [Thread Prev] [Thread Next] Indexes: Main | Date | Thread | Author

[ba-unrev-talk] How to own the internet in your spare time

http://www.icir.org/vern/papers/cdc-usenix-sec02/index.html    (01)

"The ability of attackers to rapidly gain control of vast numbers of 
Internet hosts poses an immense risk to the overall security of the 
Internet. Once subverted, these hosts can not only be used to launch 
massive denial of service floods, but also to steal or corrupt great 
quantities of sensitive information, and confuse and disrupt use of the 
network in more subtle ways.
We present an analysis of the magnitude of the threat. We begin with a 
mathematical model derived from empirical data of the spread of Code Red I 
in July, 2001. We discuss techniques subsequently employed for achieving 
greater virulence by Code Red II and Nimda. In this context, we develop and 
evaluate several new, highly virulent possible techniques: hit-list 
scanning (which creates a Warhol worm), permutation scanning (which enables 
self-coordinating scanning), and use of Internet-sized hit-lists (which 
creates a flash worm).
We then turn to the to the threat of surreptitious worms that spread more 
slowly but in a much harder to detect "contagion" fashion. We demonstrate 
that such a worm today could arguably subvert upwards of 10,000,000 
Internet hosts. We also consider robust mechanisms by which attackers can 
control and update deployed worms.
In conclusion, we argue for the pressing need to develop a "Center for 
Disease Control" analog for virus- and worm-based threats to national 
cybersecurity, and sketch some of the components that would go into such a 
Center. "    (02)