https://issues.apache.org/bugzilla/show_bug.cgi?id=40676

--- Comment #21 from Glenn Adams <[email protected]> ---
(In reply to comment #18)
> Created attachment 28988 [details]
> patch to disallow multiple image filters
> 
> Adobe Reader fails to display the submitted examples when the raw png image
> loader is used, even though they seem valid according to the spec, and are
> correctly displayed by evince, ghostscript and Preview (Mac OS X PDF
> viewer). The Adobe Reader issue only happens if the filter flate is turned
> on and seems to be due to the fact that Adobe Reader may not like more than
> one filter applied to an image. Multiple filters applied to a stream are
> valid, but are also used by PDF malware exploits (like zip bombs). I suspect
> this is the reason why Adobe Reader does not like them.
> 
> The patch fixes this problem by only using one image filter even when the
> default flate filter is turned on.

patch applied at http://svn.apache.org/viewvc?rev=1353303&view=rev

thanks luis!

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