A few days ago, Alexander Klink and Julian Walde showed how a flaw in 
implementation of hash tables in some programming languages can be used to 
launch DoS against some web servers. According to their paper [1], Java is 
also vulnerable.

I don't know how much Clojure relies on Java (HashMap etc.) in its own 
datastructures, therefore I don't know if it may also be vulnerable, but 
wanted to bring this to the attention of those who know...

See also the page of their talk [2] and twitter account dedicated to 
hashDos attack [3].


[1] http://www.nruns.com/_downloads/advisory28122011.pdf
[2] http://events.ccc.de/congress/2011/Fahrplan/events/4680.en.html
[3] http://twitter.com/hashDoS

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