From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
To: James Bottomley
<James.Bottomley-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
Cc: tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
linux-security-module-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Ken Goldman <kgoldman-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [RFC] tpm2-space: add handling for global session exhaustion
Date: Fri, 27 Jan 2017 16:35:13 -0700 [thread overview]
Message-ID: <20170127233513.GA28995@obsidianresearch.com> (raw)
In-Reply-To: <1485554699.3229.20.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
On Fri, Jan 27, 2017 at 02:04:59PM -0800, James Bottomley wrote:
> if I look at the code I've written, I don't know what the session
> number is, I just save sessionHandle in a variable for later use (lets
> say to v1). If I got the same session number returned at a later time
> and placed it in v2, all I'd notice is that an authorization using v1
> would fail.
Is there any way that could be used to cause an op thinking it is
using v1 to authorize something it shouldn't?
Jason
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WARNING: multiple messages have this Message-ID (diff)
From: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
To: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Ken Goldman <kgoldman@us.ibm.com>,
tpmdd-devel@lists.sourceforge.net,
linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [tpmdd-devel] [RFC] tpm2-space: add handling for global session exhaustion
Date: Fri, 27 Jan 2017 16:35:13 -0700 [thread overview]
Message-ID: <20170127233513.GA28995@obsidianresearch.com> (raw)
In-Reply-To: <1485554699.3229.20.camel@HansenPartnership.com>
On Fri, Jan 27, 2017 at 02:04:59PM -0800, James Bottomley wrote:
> if I look at the code I've written, I don't know what the session
> number is, I just save sessionHandle in a variable for later use (lets
> say to v1). If I got the same session number returned at a later time
> and placed it in v2, all I'd notice is that an authorization using v1
> would fail.
Is there any way that could be used to cause an op thinking it is
using v1 to authorize something it shouldn't?
Jason
next prev parent reply other threads:[~2017-01-27 23:35 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-18 20:48 [RFC] tpm2-space: add handling for global session exhaustion James Bottomley
2017-01-18 20:48 ` James Bottomley
[not found] ` <1484772489.2396.2.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-01-19 12:25 ` Jarkko Sakkinen
2017-01-19 12:25 ` [tpmdd-devel] " Jarkko Sakkinen
[not found] ` <20170119122533.d7h5rgatpwl3qmcl-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-01-19 12:41 ` Jarkko Sakkinen
2017-01-19 12:41 ` [tpmdd-devel] " Jarkko Sakkinen
[not found] ` <20170119124101.nw7a7m735zhiivfo-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-01-27 21:20 ` Ken Goldman
2017-01-27 21:59 ` James Bottomley
2017-01-27 21:59 ` [tpmdd-devel] " James Bottomley
2017-01-19 12:59 ` James Bottomley
2017-01-19 12:59 ` [tpmdd-devel] " James Bottomley
2017-01-20 13:40 ` Jarkko Sakkinen
2017-01-27 21:42 ` Ken Goldman
2017-01-27 22:04 ` James Bottomley
2017-01-27 22:04 ` [tpmdd-devel] " James Bottomley
[not found] ` <1485554699.3229.20.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-01-27 23:35 ` Jason Gunthorpe [this message]
2017-01-27 23:35 ` Jason Gunthorpe
[not found] ` <20170127233513.GA28995-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-01-27 23:48 ` James Bottomley
2017-01-27 23:48 ` [tpmdd-devel] " James Bottomley
2017-01-30 0:52 ` Ken Goldman
2017-01-30 0:52 ` Ken Goldman
2017-01-30 16:04 ` James Bottomley
2017-01-30 16:04 ` [tpmdd-devel] " James Bottomley
[not found] ` <1485792295.2518.23.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-01-30 21:58 ` Jarkko Sakkinen
2017-01-30 21:58 ` [tpmdd-devel] " Jarkko Sakkinen
[not found] ` <20170130215815.4lr42ob7e4cycwgi-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-01-30 22:13 ` James Bottomley
2017-01-30 22:13 ` [tpmdd-devel] " James Bottomley
[not found] ` <1485814388.2518.28.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-01-30 22:46 ` Ken Goldman
2017-01-31 13:31 ` Jarkko Sakkinen
2017-01-31 13:31 ` [tpmdd-devel] " Jarkko Sakkinen
2017-02-10 17:22 ` Kenneth Goldman
2017-01-31 19:28 ` Ken Goldman
2017-01-31 19:55 ` James Bottomley
2017-01-31 19:55 ` [tpmdd-devel] " James Bottomley
[not found] <jarkko.sakkinen@linux.intel.com>
2017-02-09 9:06 ` Dr. Greg Wettstein
[not found] ` <201702090906.v1996c6a015552-DHO+NtfOqB5PEDpkEIzg7wC/G2K4zDHf@public.gmane.org>
2017-02-09 15:19 ` Jarkko Sakkinen
[not found] ` <20170209151922.cqo32h4io5dqyvvw-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-02-09 19:04 ` Jason Gunthorpe
[not found] ` <20170209190426.GA1104-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-02-09 19:29 ` James Bottomley
[not found] ` <1486668591.2616.45.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-02-09 21:54 ` Jason Gunthorpe
2017-02-10 8:48 ` [tpmdd-devel] " Jarkko Sakkinen
[not found] ` <20170210084837.lq3mofgfwvjx623m-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-02-10 23:13 ` Kenneth Goldman
2017-02-09 20:05 ` James Bottomley
[not found] <James.Bottomley@HansenPartnership.com>
2017-02-10 10:03 ` Dr. Greg Wettstein
[not found] ` <201702101003.v1AA3plF029882-DHO+NtfOqB5PEDpkEIzg7wC/G2K4zDHf@public.gmane.org>
2017-02-10 16:46 ` James Bottomley
[not found] ` <1486745163.2502.26.camel-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
2017-02-10 21:13 ` Kenneth Goldman
2017-02-14 14:38 ` [tpmdd-devel] " Dr. Greg Wettstein
[not found] ` <20170214143829.GA28175-DHO+NtfOqB5PEDpkEIzg7wC/G2K4zDHf@public.gmane.org>
2017-02-14 16:47 ` James Bottomley
2017-02-10 21:18 ` Kenneth Goldman
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