Full Disclosure mailing list archives
Re: #warning -- DICE.COM insecure passwords
From: Jeffrey Walton <noloader () gmail com>
Date: Tue, 12 Feb 2013 18:11:54 -0500
On Tue, Feb 12, 2013 at 5:58 PM, Travis Biehn <tbiehn () gmail com> wrote:
What Tim said. I think warning was writing about the public shame from having a massive pw dump not having some neckbeard expose them over using crypt on some random industry mailing list (shudders). Here is a long article on secure password storage. It is extremely exciting: http://www.cigital.com/justice-league-blog/2012/06/11/securing-password-digests-or-how-to-protect-lonely-unemployed-radio-listeners/
I got to attend that talk given at OWASP in Northern Virginia (https://www.owasp.org/index.php/Virginia, JULY 2012). John Steven and did a great job. Jeff
On Tue, Feb 12, 2013 at 5:14 PM, Tim <tim-security () sentinelchicken org> wrote:That's assuming that they didn't do the risk analysis and decide that the effort required to fix the problem (which will probably require, among other things, having every single user change their password) is worth the effort. Given that so many places have gotten hacked and pwned that the user community response is usually "Meh. Another one", they may rightfully have concluded that risking public shaming is in fact a good business decision...Here's a bit of pseudocode for you Valdis: for each user: let user.new_hash = scrypt(user.old_crypt_hash) # now update authentication routine to use user.new_hash with new # nested hashing algorithm So really, there's actually not a good reason to keep a crappy hash database around. Just add a layer of good salted hashing on top. With that said, the unusual quirk of crypt being limited to 7 characters is an additional challenge, but you can start with the above steps (which immediately improves security), and then slowly transition to using scrypt alone or some variant that supports longer passwords.
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Current thread:
- #warning -- DICE.COM insecure passwords warning (Feb 11)
- Re: #warning -- DICE.COM insecure passwords Valdis . Kletnieks (Feb 12)
- Re: #warning -- DICE.COM insecure passwords Tim (Feb 12)
- Re: #warning -- DICE.COM insecure passwords Travis Biehn (Feb 12)
- Re: #warning -- DICE.COM insecure passwords Jeffrey Walton (Feb 12)
- Re: #warning -- DICE.COM insecure passwords Tim (Feb 12)
- Re: #warning -- DICE.COM insecure passwords Valdis . Kletnieks (Feb 12)