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REXML Vulnerability

25 Aug 2008

Jan bracht me (en de rest van de wereld) deze morgen op de hoogte van een DoS vulnerability in REXML.

There is a DoS vulnerability in the REXML library used by Rails to parse incoming XML requests. A so-called “XML entity explosion” attack technique can be used for remotely bringing down (disabling) any application which parses user-provided XML.

De oplossing:

sudo gem install rexml-expansion-fix

en in je Rails app (of andere)

require "rexml-expansion-fix"

Een gewaarschuwd man is er 2 waard.

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