full-disclosure - Re: Facebook Attach EXE Vulnerability

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Date: Fri, 28 Oct 2011 19:38:00 +0100
From: Dave <mrx@...pergander.org.uk>
To: full-disclosure@...ts.grok.org.uk
Subject: Re: Facebook Attach EXE Vulnerability

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> I think they need a better way to sift the wheat from the chaff.

Numbers can be magic and eight bytes is enough of a taste to tell honey from vinegar.


Nice find
Dave





On 28/10/2011 18:56, Pablo Ximenes wrote:
> I see. I have seen this kinda behavior from vendors too often. I supose the reason for this is the flood of false positives. I think they
> need a better way to sift the wheat from the chaff.
> 
> Congrats for your work!
> 
> 2011/10/28 Nathan Power <np@...uritypentest.com>
> 
>> I was basically told that Facebook didn't see it as an issue and I was puzzled by that. Ends up the Facebook security team had issues
>> reproducing my work and that's why they initially disgarded it. After publishing, the Facebook security team re-examined the issue and by
>> working with me they seem to have been able to reproduce the bug.
>> 
>> 
>> Nathan Power www.securitypentest.com
>> 
>> 
>> On Fri, Oct 28, 2011 at 11:18 AM, Pablo Ximenes <pablo@...en.es> wrote:
>> 
>>> Not fixed yet. At least not yesterday when I checked.
>>> 
>>> Nathan, didn't Facebook ask for some time to fix this bug after they have acknowledged it?
>>> 
>>> 
>>> Pablo Ximenes <http://ximen.es/>http://ximen.es/ <http://twitter.com/pabloximenes>http://twitter.com/pabloximenes
>>> 
>>> Em 27/10/2011, às 19:29, Joshua Thomas < <rappercrazzy@...il.com> rappercrazzy@...il.com> escreveu:
>>> 
>>> can't believe such was on FB  .... wahahaha !!! lol ....rofl ...
>>> 
>>> When was this discovered and fixed ?
>>> 
>>> 
>>> On Thu, Oct 27, 2011 at 1:02 AM, Nathan Power < <np@...uritypentest.com><np@...uritypentest.com> np@...uritypentest.com> wrote:
>>> 
>>>> 
>>>> --------------------------------------------------------------------------------- 1. Summary:
>>>> 
>>>> When using the Facebook 'Messages' tab, there is a feature to attach a file. Using this feature normally, the site won't allow a user
>>>> to attach an executable file. A bug was discovered to subvert this security mechanisms. Note, you do NOT have to be friends with the
>>>> user to send them a message with an attachment.
>>>> 
>>>> 
>>>> ---------------------------------------------------------------------------------
>>>> 
>>>> Read the rest of this advisory here:
>>>> 
>>>> <http://www.securitypentest.com/2011/10/facebook-attach-exe-vulnerability.html><http://www.securitypentest.com/2011/10/facebook-attach-exe-vulnerability.html>
>>>>
>>>> 
http://www.securitypentest.com/2011/10/facebook-attach-exe-vulnerability.html
>>>> 
>>>> 
>>>> Enjoy :)
>>>> 
>>>> 
>>>> Nathan Power <http://www.securitypentest.com> <http://www.securitypentest.com> www.securitypentest.com
>>>> 
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>>> 
>>> _______________________________________________ Full-Disclosure - We believe in it. Charter:
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>> 
> 
> 
> 
> _______________________________________________ Full-Disclosure - We believe in it. Charter:
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