Full Disclosure mailing list archives
Re: Flog 1.1.2 Remote Admin Password Disclosure
From: endrazine <endrazine () gmail com>
Date: Mon, 08 Jan 2007 18:41:22 +0100
Hi Vladis, Hi dear list, Valdis.Kletnieks () vt edu a écrit :
It's a pretty easy proof actually. If your password input routine allows more different passwords than there are possible hashes, you *will* have collisions. For instance, if you use a 64-bit hash, and reasonable-length passwords, you can create more than 2**64 of them, and 2 *have* to collide.
Agreed, good sense helps in some cases ;)
If you're using anything resembling a sane hash (such as MD5 or similar), what happens is that you basically ignore the hash collisions - because rather than "1234", your colliding password/phrase is probably a 32-byte or so string, which is likely not even enterable at the keyboard (it ends up being A # ctl-b 9 e alt-control-meta-$ etcetc - of the 32, likely only 10 or so of the characters are from the 96-char printable ASCII set, and there's a good chance that at least several of the bytes are ones you can't enter from the keyboard at all....)
Here again, I agree. Now, if one needs to exhaustively try every possible 32b hashes with the largest possible charset (or even bigger hashes with a smaller - like those alphanumerical keys you just mentionned), to break a password hash, the it's not a "*BIG*" security issue like mentionned earlier imho. Cheers, endrazine- _______________________________________________ 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:
- Flog 1.1.2 Remote Admin Password Disclosure corrado.liotta (Jan 05)
- Re: Flog 1.1.2 Remote Admin Password Disclosure T Biehn (Jan 05)
- Re: Flog 1.1.2 Remote Admin Password Disclosure Valdis . Kletnieks (Jan 05)
- Re: Flog 1.1.2 Remote Admin Password Disclosure wac (Jan 07)
- Re: Flog 1.1.2 Remote Admin Password Disclosure endrazine (Jan 07)
- Re: Flog 1.1.2 Remote Admin Password Disclosure Valdis . Kletnieks (Jan 08)
- Re: Flog 1.1.2 Remote Admin Password Disclosure endrazine (Jan 08)
- Re: Flog 1.1.2 Remote Admin Password Disclosure endrazine (Jan 08)
- Message not available
- Fwd: Flog 1.1.2 Remote Admin Password Disclosure T Biehn (Jan 08)
- Re: Flog 1.1.2 Remote Admin Password Disclosure Valdis . Kletnieks (Jan 05)
- Re: Flog 1.1.2 Remote Admin Password Disclosure T Biehn (Jan 05)
- Re: Flog 1.1.2 Remote Admin Password Disclosure wac (Jan 15)