Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Wed, 24 Jul 2013 01:15:39 +0300
From: Henri Salo <>
Cc:, Salvatore Bonaccorso <>
Subject: Re: CVE Request: Django: Account enumeration through
 timing attack in password verification in django.contrib.auth

On Mon, Jul 22, 2013 at 05:04:44PM +0200, Salvatore Bonaccorso wrote:
> Hi
> Cc'ing
> 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]
> A proposed patch is at [2] but not yet a commit in upstream git repository.
>  [2]
> Does this needs a CVE asignment?
> Regards,
> Salvatore

Please see comments from aaugustin

This is exemplary case of CWE-208 and similar issues have received CVEs.

Henri Salo

Download attachment "signature.asc" of type "application/pgp-signature" (199 bytes)

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.