full-disclosure - Re: Another minor facebook security flaw

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Message-ID: <4E79A59F.9060604@ntlworld.com>
Date: Wed, 21 Sep 2011 09:51:43 +0100
From: Jacqui Caren-home <jacqui.caren@...world.com>
To: full-disclosure@...ts.grok.org.uk
Subject: Re: Another minor facebook security flaw

On 20/09/2011 06:04, James Fife wrote:
> I noticed a recent flaw in Facebooks security resolution process recently. After being asked to confirm my identity simply because I was using a different computer, I apparently took too long to
> identify my friends in their photos. However, I was able to try two more times before being locked out. In which case Facebook provided the exact same photos with the same selection of people to name
> in order to confirm my identity. What this means is that I could conceivably attempt to logon to a victims Facebook account from an unauthorized device to get such a prompt, and then take my time to
> research the answers.

I dont have the link but there is a really neat image search engine. You point it at an
image (file->save image as?) and it will hunt down the URLs referencing similar images.

Have seen it used to find sites using "stolen" images - not sure if it would work
with fb image archives but worth a try.

Could prolly automate the whole thing with 20 lines of perl :-)

Jacqui

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