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Re: Password validation security issue

References (7 earlier) <roy-5B94F1.15010902032014@news.panix.com> <5313d7fe$0$29985$c3e8da3$5496439d@news.astraweb.com> <mailman.7618.1393814245.18130.python-list@python.org> <53140749$0$2923$c3e8da3$76491128@news.astraweb.com> <CAPTjJmoDRUwDXAFg23pPQqHFhY_N-3dddD_0c8qE0VihD3SnHg@mail.gmail.com>
From Ian Kelly <ian.g.kelly@gmail.com>
Date 2014-03-02 23:50 -0700
Subject Re: Password validation security issue
Newsgroups comp.lang.python
Message-ID <mailman.7625.1393829478.18130.python-list@python.org> (permalink)

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On Sun, Mar 2, 2014 at 10:44 PM, Chris Angelico <rosuav@gmail.com> wrote:
> Of course, the whole concept depends on being able to use long
> memorable passwords. Any system that sets a maximum password length of
> anything less than about 30-40 characters is causing its users
> problems. There's almost never any reason to set a maximum at all.

Well, there's usually *some* reason.  If you allow your users to set a
100-MB password then your system has to accept and attempt to verify
any 100-MB passwords that might get passed in, which opens you up to a
certain DoS attack.  Setting the limit at 8 characters though is
absurd and a probable indication of bad password handling.

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Thread

Password validation security issue Renato <rvernucio@gmail.com> - 2014-03-01 09:49 -0800
  Re: Password validation security issue Chris Angelico <rosuav@gmail.com> - 2014-03-02 05:11 +1100
  Re: Password validation security issue Christian Heimes <christian@python.org> - 2014-03-01 19:31 +0100
  Re: Password validation security issue Tim Chase <python.list@tim.thechases.com> - 2014-03-01 12:38 -0600
  Re: Password validation security issue Chris Angelico <rosuav@gmail.com> - 2014-03-02 05:43 +1100
  Re: Password validation security issue Chris Angelico <rosuav@gmail.com> - 2014-03-02 05:45 +1100
  Re: Password validation security issue Christian Heimes <christian@python.org> - 2014-03-01 20:54 +0100
    Re: Password validation security issue Roy Smith <roy@panix.com> - 2014-03-01 15:25 -0500
      Re: Password validation security issue Christian Heimes <christian@python.org> - 2014-03-01 23:07 +0100
      Re: Password validation security issue Chris Angelico <rosuav@gmail.com> - 2014-03-02 09:13 +1100
  Re: Password validation security issue Chris Angelico <rosuav@gmail.com> - 2014-03-02 07:11 +1100
  Re: Password validation security issue Christian Heimes <christian@python.org> - 2014-03-02 20:25 +0100
    Re: Password validation security issue Roy Smith <roy@panix.com> - 2014-03-02 15:01 -0500
      Re: Password validation security issue Chris Angelico <rosuav@gmail.com> - 2014-03-03 07:32 +1100
      Re: Password validation security issue Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-03-03 01:16 +0000
        Re: Password validation security issue Ian Kelly <ian.g.kelly@gmail.com> - 2014-03-02 18:52 -0700
          Re: Password validation security issue Steven D'Aprano <steve@pearwood.info> - 2014-03-03 04:38 +0000
            Re: Password validation security issue Chris Angelico <rosuav@gmail.com> - 2014-03-03 16:44 +1100
            Re: Password validation security issue Ian Kelly <ian.g.kelly@gmail.com> - 2014-03-02 23:50 -0700
        Re: Password validation security issue Chris Angelico <rosuav@gmail.com> - 2014-03-03 13:56 +1100
          Re: Password validation security issue Roy Smith <roy@panix.com> - 2014-03-03 08:41 -0500
            Re: Password validation security issue Chris Angelico <rosuav@gmail.com> - 2014-03-04 00:55 +1100
              Re: Password validation security issue Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-03-03 16:46 +0000
                Re: Password validation security issue Chris Angelico <rosuav@gmail.com> - 2014-03-04 05:46 +1100
            Re: Password validation security issue MRAB <python@mrabarnett.plus.com> - 2014-03-03 16:29 +0000
            Re: Password validation security issue Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-03-03 17:41 +0000
  Re: Password validation security issue Renato <rvernucio@gmail.com> - 2014-03-02 15:10 -0800
    Re: Password validation security issue Ian Kelly <ian.g.kelly@gmail.com> - 2014-03-02 18:49 -0700
    Re: Password validation security issue Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-03-03 02:30 +0000

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