[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Tue, 23 Jul 2013 16:33:06 +0200
From: Salvatore Bonaccorso <carnil@...ian.org>
To: oss-security@...ts.openwall.com
Cc: security@...ngoproject.com
Subject: Re: CVE Request: Django: Account enumeration through
timing attack in password verification in django.contrib.auth
Hi
On Mon, Jul 22, 2013 at 05:04:44PM +0200, Salvatore Bonaccorso wrote:
> Hi
>
> Cc'ing security@...ngoproject.com
>
> From [1] in Django accounts can be enumerated trough timing attacks:
>
> > When attempting to authenticate using django.contrib.auth, if a user does not
> > exist the authenticate() function returns None nearly instantaneously, while
> > when a user exists it takes much longer as the attempted password gets hashed
> > and compared with the stored password. This allows for an attacker to infer
> > whether or not a given account exists based upon the response time of an
> > authentication attempt. This can be seen much more clearly when the number of
> > rounds on the password hasher is set to something high like 100000.
>
> [1] https://code.djangoproject.com/ticket/20760
>
> A proposed patch is at [2] but not yet a commit in upstream git repository.
>
> [2] https://code.djangoproject.com/attachment/ticket/20760/20760_fix_hash_once.diff
>
> Does this needs a CVE asignment?
Only a update: this was now fixed in [1] in master branch, and in [2]
as backport for 1.6.x.
[1] https://github.com/django/django/commit/5dbca13f3baa2e1bafd77e84a80ad6d8a074712e
[2] https://github.com/django/django/commit/4525eab0779a2946063288224dcebb61ba382976
Regards,
Salvatore
Powered by blists - more mailing lists
Please check out the
Open Source Software Security Wiki, which is counterpart to this
mailing list.
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
