Re: Re: yahoo mail login security

["Darren Bounds" <dbounds () gmail com>]

Perhaps it's related to the server in which your account resides on.
I'm not sure. I do know that up until just recently I was always
redirected to a non-SSL site regardless of how I entered. I then had
to manually enter https: which was quite irritating.

On 5/5/06, Prakash Kailasa <pkailasa () seisint com> wrote:
> I've had my gmail account since September 2004.
>
> I've almost always logged in using https: connection, and it has been
> my experience that secure connection is maintained even after login
> and throught the session.
>
> The only time I remember logging in on non-secure connection was when
> they introduced the chat feature, which required (for a period of time)
> that I use the non-secure connection.
>
> Thanks,
> /prakash
>
> On Thu, May 04, 2006 at 08:34:53PM -0400, Darren Bounds wrote:
> > That Google SSL functionality must have just recently been
> > implemented. Back in December (when I last checked) they were
> > operating in the same fashion as Yahoo, redirecting clear text after
> > SSL-based authentication.
> >
> >
> > On 5/2/06, Damon Leung <bcdnet () myrealbox com> wrote:
> > >In Gmail, if you start with the url https://mail.google.com, then you stay
> > >in https even after authentication.
> > >
> > >-----Original Message-----
> > >From: Ace123 <flace9 () gmail com>
> > >To: "ROB DIXON" <rdixon () workforcewv org>
> > >Date: Tue, 2 May 2006 11:30:32 +0530
> > >Subject: Re: yahoo mail login security
> > >
> > >1. Would it then be wise to send the md5 hash over ssl?
> > >
> > >2. Yahoo is not alone in switching to http for email after
> > >authenticating the user, both hotmail and gmail do the same. One
> > >reason I can think of why they do this is, the various resources in
> > >their pages come from different domains (possibly 3rd party) and they
> > >can't ask for all of them to do SSL. Do you know of any other reasons?
> > >
> > >3. The cookie names these guys use are very tricky, there are usually
> > >many cookies and it is not clear why of them represents the session,
> > >so that we can take that cookie, set it in our browser and check out
> > >other's email. Ofcourse, it might be possible to set all the cookies
> > >that we see there, but I have not tried that. Has anyone done any
> > >research on what each of the cookies is used for, in
> > >yahoo/hotmail/gmail?
> > >
> > >Thanks!
> > >
> > >
> > >On 5/2/06, ROB DIXON <rdixon () workforcewv org> wrote:
> > >> exactly
> > >>
> > >> Robert L. Dixon,  CHFI
> > >> State of West Virginia's
> > >> West Virginia Office of Technology
> > >> Infrastructure Applications
> > >> Netware/GroupWise Administrator
> > >> Telephone: (304)-558-5472 ex.4225
> > >> ------------------------------------------
> > >> If you spend more on coffee than on IT security, you will be hacked.
> > >> What's more, you deserve to be hacked.
> > >> -- former White House cybersecurity czar Richard Clarke
> > >> >>> "Matt Fisher" <mfisher () spidynamics com>  >>>
> > >> Don't they revert back to HTTP after auth anyhow ?
> > >> Protect my credentials all you want, but if you give up my email on the
> > >> wire(less) I'm switching regardless.
> > >>
> > >>
> > >>
> > >> -----Original Message-----
> > >> From: ROB DIXON [mailto:rdixon () workforcewv org]
> > >> Sent: Monday, May 01, 2006 3:51 PM
> > >> To: flace9 () gmail com; vanderaj () greebo net
> > >> Cc: webappsec () securityfocus com
> > >> Subject: Re: yahoo mail login security
> > >>
> > >> If you are capturing the form submission via MITM then would SSL not be
> > >> just as trivial via Cain and Able.\
> > >>
> > >> Granted it would be obvious since the SSL cert would appear to be
> > >> invalid, but not everyone is that savy.
> > >>
> > >> Robert L. Dixon,  CHFI
> > >> State of West Virginia's
> > >> West Virginia Office of Technology
> > >> Infrastructure Applications
> > >> Netware/GroupWise Administrator
> > >> Telephone: (304)-558-5472 ex.4225
> > >> ------------------------------------------
> > >> If you spend more on coffee than on IT security, you will be hacked.
> > >> What's more, you deserve to be hacked.
> > >> -- former White House cybersecurity czar Richard Clarke
> > >> >>> Andrew van der Stock <vanderaj () greebo net>  >>>
> > >> Several reasons:
> > >>
> > >> 1. MD5 does protect the password... as long as it is salted
> > >> correctly. Unsalted MD5 hashes are trivially breakable using rainbow
> > >> attacks, and are unsuitable for most uses (despite heavy usage by
> > >> many programs in exactly this fashion).
> > >>
> > >> 2. Replay attacks on public networks. Capturing the form submission
> > >> (trivial without SSL) would allow an attacker to replay the
> > >> conversation and log on as the identity without any issues
> > >>
> > >> 3. MD5 is provably weak as a hash - see the work of Wang et al:
> > >>
> > >> http://eprint.iacr.org/2004/199.pdf
> > >>
> > >> 4. Javascript on the client is not a trusted environment. Minimizing
> > >> the trust of security weak components is a good design goal.
> > >>
> > >> 5. SSL is cheap. A certificate costs less than $100 these days and
> > >> solves many of these issues.
> > >>
> > >> Andrew
> > >>
> > >>
> > >>
> > >> On 30/04/2006, at 5:55 PM, Ace123 wrote:
> > >>
> > >> > Clicking on "Why this is secure" link on the yahoo login page gives
> > >> > this:
> > >> >
> > >> > "Yahoo! now submits your ID and password securely via SSL (Secure
> > >> > Sockets Layer) encryption. This means that your personal information
> > >> > is more secure every time you sign in.
> > >> >
> > >> > In the past, Yahoo! used a challenge-response mechanism to protect
> > >> > passwords using MD5. Passwords were scrambled using a one-way hash, so
> > >> > that they could not be converted to clear text."
> > >> >
> > >> >
> > >> > What could be the reasons why yahoo changed their login security
> > >> > mechanism?
> > >> >
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> > --
> >
> > Thank you,
> > Darren Bounds
> >
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> |                -- Bill Cosby                                         |
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--

Thank you,
Darren Bounds

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Sponsored by: Watchfire

The Twelve Most Common Application-level Hack Attacks
Hackers continue to add billions to the cost of doing business online
despite security executives' efforts to prevent malicious attacks. This
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and outlines a guideline for developing secure web applications.
Download this whitepaper today!

https://www.watchfire.com/securearea/whitepapers.aspx?id=701300000007t9r
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