full-disclosure - Re: Google Accounts Security Vulnerability

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Message-ID: <CA+twzKV-iw8LkwBk07PSBRUjjmXESBteJr0fjoXgTEJsyurxEg@mail.gmail.com>
Date: Tue, 15 May 2012 15:20:37 -0400
From: Mateus Felipe Tymburibá Ferreira
	<mateustymbu@...il.com>
To: "Thor (Hammer of God)" <thor@...merofgod.com>
Cc: "full-disclosure@...ts.grok.org.uk" <full-disclosure@...ts.grok.org.uk>,
	"Michael J. Gray" <mgray@...tcode.com>
Subject: Re: Google Accounts Security Vulnerability

I'm just copying the original message's part that probably answer your
question (I did not test it...):

">From there, I attempted to log-in to my Google account with the same
> username and password.
>
> To my surprise, I was not presented with any questions to confirm my
> identity.
>
> This completes the steps required to bypass this account hijacking
> counter-measure."


Mateus Felipe Tymburibá Ferreira, M. Sc. student at
UFAM<http://portal.ufam.edu.br>
  CISSP <https://www.isc2.org/cissp/default.aspx>,
OSCP<http://www.offensive-security.com/information-security-certifications/oscp-offensive-security-certified-professional/>,
OSCE<http://www.offensive-security.com/information-security-certifications/osce-offensive-security-certified-expert/>,
OSWP<http://www.offensive-security.com/information-security-certifications/oswp-offensive-security-wireless-professional/>

<https://www.isc2.org/cissp/default.aspx>
<http://www.offensive-security.com/information-security-certifications/oscp-offensive-security-certified-professional/><http://www.offensive-security.com/information-security-certifications/osce-offensive-security-certified-expert/><http://www.offensive-security.com/information-security-certifications/oswp-offensive-security-wireless-professional/>


2012/5/15 Thor (Hammer of God) <thor@...merofgod.com>

> I'm not sure I understand the issue here - the requirement for someone
> "happening to come across your username and password" is a pretext.
>
> Logging on to the web interface where you can change password and other
> personal information as well as verify existing site cookies affords the
> service the ability to check these sorts of things.  But you logged on via
> IMAP, which is its own service just like POP3 or SMTP.   These services
> can't check where you are or for the existence of a cookie, so I'm not
> really sure what your expectation is, or why this is being presented as an
> issue.   Am I missing something?
>
> Timothy "Thor"  Mullen
> www.hammerofgod.com
> Thor's Microsoft Security Bible
>
>
>
> -----Original Message-----
> From: full-disclosure-bounces@...ts.grok.org.uk [mailto:
> full-disclosure-bounces@...ts.grok.org.uk] On Behalf Of Jason Hellenthal
> Sent: Saturday, May 12, 2012 9:32 AM
> To: Michael J. Gray
> Cc: full-disclosure@...ts.grok.org.uk
> Subject: Re: [Full-disclosure] Google Accounts Security Vulnerability
>
>
> LMFAO!
>
> On Sat, May 12, 2012 at 04:22:30AM -0700, Michael J. Gray wrote:
> > Effective since May 1, 2012.
> >
> > Products Affected: All Google account based services
> >
> >
> >
> > Upon attempting to log-in to my Google account while away from home, I
> > was presented with a message that required me to confirm various
> > details about my account in order to ensure I was a legitimate user
> > and not just someone who came across my username and password. Unable
> > to remember what my phone number from 2004 was, I looked for a way
> around it.
> >
> > The questions presented to me were:
> >
> >     Complete the email address: a******g@...il.com
> >
> >     Complete the phone number: (425) 4**-***7
> >
> >
> >
> > Since this was presented to me, I was certain I had my username and
> > password correct.
> >
> > >From there, I simply went to check my email via IMAP at the new
> location.
> >
> > I was immediately granted access to my email inboxes with no trouble.
> >
> >
> >
> > >From there, I attempted to log-in to my Google account with the same
> > username and password.
> >
> > To my surprise, I was not presented with any questions to confirm my
> > identity.
> >
> > This completes the steps required to bypass this account hijacking
> > counter-measure.
> >
> >
> >
> > This just goes to show that even the largest corporations that employ
> > teams of security experts, can also overlook very simple issues.
> >
>
> > _______________________________________________
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>
> --
>
>  - (2^(N-1))
>
> _______________________________________________
> Full-Disclosure - We believe in it.
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> _______________________________________________
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