Full Disclosure mailing list archives
Re: Google Accounts Security Vulnerability
From: Ferenc Kovacs <tyra3l () gmail com>
Date: Tue, 15 May 2012 20:37:28 +0200
"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." I didn't verified, but from the report it seems that those additional steps of verification can be bypassed, if you first log in with the credentials via IMAP. I would guess that the successfull login on IMAP adds that new IP address to the trusted IP list, hence the web login will skip the additional verification. On Tue, May 15, 2012 at 7:57 PM, Thor (Hammer of God) <thor () hammerofgod com>wrote:
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 () lists grok org uk [mailto: full-disclosure-bounces () lists grok org uk] On Behalf Of Jason Hellenthal Sent: Saturday, May 12, 2012 9:32 AM To: Michael J. Gray Cc: full-disclosure () lists 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 wayaround it.The questions presented to me were: Complete the email address: a******g () gmail 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 newlocation.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 sameusername 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._______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/-- - (2^(N-1)) _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/ _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
-- Ferenc Kovács @Tyr43l - http://tyrael.hu
_______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
Current thread:
- Google Accounts Security Vulnerability Michael J. Gray (May 12)
- Re: Google Accounts Security Vulnerability Jason Hellenthal (May 13)
- Re: Google Accounts Security Vulnerability Thor (Hammer of God) (May 15)
- Re: Google Accounts Security Vulnerability Ferenc Kovacs (May 15)
- Re: Google Accounts Security Vulnerability Mateus Felipe Tymburibá Ferreira (May 16)
- Re: Google Accounts Security Vulnerability Thor (Hammer of God) (May 15)
- Re: Google Accounts Security Vulnerability Ferenc Kovacs (May 15)
- Re: Google Accounts Security Vulnerability Shreyas Zare (May 15)
- Re: Google Accounts Security Vulnerability Michael J. Gray (May 16)
- Re: Google Accounts Security Vulnerability Jason Hellenthal (May 16)
- Re: Google Accounts Security Vulnerability Gage Bystrom (May 16)
- Re: Google Accounts Security Vulnerability Thor (Hammer of God) (May 15)
- Re: Google Accounts Security Vulnerability Jason Hellenthal (May 13)
- <Possible follow-ups>
- Re: Google Accounts Security Vulnerability Michael J. Gray (May 16)
- Re: Google Accounts Security Vulnerability Mike Hearn (May 17)