Re: SAX characters event and external entities
David Megginson <david@m...> writes: > K. Ari Krupnikov writes: > > > Would you report it as a (perhaps recoverable) error? Braking > > character data into multiple events would defy the purpose of this > > filter (to relieve content handlers from the need to do that > > themselves) and do nothing to solve the security issue. > > Here's an easy attack -- send you a start tag, then just keep sending > random alphanumeric characters until your system chokes. An arbitrary > limit -- even a very high one, like a few gigabytes -- would be useful. I see your point - introducing the potential for memory exhaustion in an API that otherwise does not deal with memory allocation. But since some memory will likely be allocated to store information from chunks of the document (you can't always stream /everything/), you could as easily choke my system by sending me empty start tags in the right position in the document. I did not originally have streaming applications with large character content sections in mind. Thank you for pointing out a limit to this filter's application domain -- I shall include it in the documentation. Ari.
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