From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: platform-driver-x86@vger.kernel.org, x86@kernel.org,
linux-kernel@vger.kernel.org, Borislav Petkov <bp@suse.de>,
"David S. Miller" <davem@davemloft.net>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Grzegorz Andrejczuk <grzegorz.andrejczuk@intel.com>,
Haim Cohen <haim.cohen@intel.com>, Ingo Molnar <mingo@kernel.org>,
Janakarajan Natarajan <Janakarajan.Natarajan@amd.com>,
Jim Mattson <jmattson@google.com>,
Kan Liang <Kan.liang@intel.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Kyle Huey <me@kylehuey.com>, Len Brown <len.brown@intel.com>,
"open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
"open list:FILESYSTEMS (VFS and infrastructure)"
<linux-fsdevel@vger.kernel.org>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Paolo Bonzini <pbonzini@redhat.com>,
Piotr Luc <piotr.luc@intel.com>,
Radim Kr??m???? <rkrcmar@redhat.com>,
Randy Dunlap <rdunlap@infradead.org>,
Sean Christopherson <sean.j.christopherson@intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Tom Lendacky <thomas.lendacky@amd.com>,
Vikas Shivappa <vikas.shivappa@linux.intel.com>
Subject: Re: [PATCH v6 00/11] Intel SGX Driver
Date: Wed, 20 Dec 2017 01:33:46 +0200 [thread overview]
Message-ID: <1513726426.2206.18.camel@linux.intel.com> (raw)
In-Reply-To: <20171212140750.GA19663@localhost>
On Tue, 2017-12-12 at 15:07 +0100, Pavel Machek wrote:
> On Sat 2017-11-25 21:29:17, Jarkko Sakkinen wrote:
> > Intel(R) SGX is a set of CPU instructions that can be used by applications to
> > set aside private regions of code and data. The code outside the enclave is
> > disallowed to access the memory inside the enclave by the CPU access control.
> > In a way you can think that SGX provides inverted sandbox. It protects the
> > application from a malicious host.
>
> Would you list guarantees provided by SGX?
>
> For example, host can still observe timing of cachelines being
> accessed by "protected" app, right? Can it also introduce bit flips?
>
> Pavel
I'll give a more proper response to this now that all the reported major
issues in the code have been fixed in v9.
Yes, SGX is vulnerable to the L1 cacheline timing attacks. Jethro
Beekman wrote a great summary about this on early March:
https://jbeekman.nl/blog/2017/03/sgx-side-channel-attacks/
The counter measures are the same as without SGX. It really does not
add or degrade security in this area.
/Jarkko
next prev parent reply other threads:[~2017-12-19 23:34 UTC|newest]
Thread overview: 85+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-25 19:29 [PATCH v6 00/11] Intel SGX Driver Jarkko Sakkinen
2017-11-25 19:29 ` [PATCH v6 01/11] intel_sgx: updated MAINTAINERS Jarkko Sakkinen
2017-11-25 20:19 ` Joe Perches
2017-11-26 10:41 ` Bjørn Mork
2017-11-26 15:33 ` Jarkko Sakkinen
2017-11-25 19:29 ` [PATCH v6 02/11] x86: add SGX definition to cpufeature Jarkko Sakkinen
2017-11-25 19:29 ` [PATCH v6 03/11] x86: define IA32_FEATURE_CONTROL.SGX_ENABLE Jarkko Sakkinen
2017-11-28 17:13 ` Sean Christopherson
2017-11-28 20:47 ` Jarkko Sakkinen
2017-11-25 19:29 ` [PATCH v6 04/11] x86: define IA32_FEATUE_CONTROL.SGX_LC Jarkko Sakkinen
2017-11-28 17:16 ` Sean Christopherson
2017-11-28 18:28 ` Sean Christopherson
2017-11-28 20:53 ` Jarkko Sakkinen
2017-11-28 21:24 ` Jarkko Sakkinen
2017-11-28 21:33 ` Sean Christopherson
2017-11-28 21:55 ` Jarkko Sakkinen
2017-11-28 22:00 ` Sean Christopherson
2017-11-28 22:21 ` Jarkko Sakkinen
2017-11-29 15:38 ` Jarkko Sakkinen
2017-11-30 3:05 ` Kai Huang
2017-11-30 16:44 ` Jarkko Sakkinen
2017-11-28 21:40 ` Jarkko Sakkinen
2017-11-28 21:44 ` Sean Christopherson
2017-11-28 22:03 ` Jarkko Sakkinen
2017-11-28 22:11 ` Jarkko Sakkinen
2017-11-28 20:51 ` Jarkko Sakkinen
2017-11-25 19:29 ` [PATCH v6 05/11] x86: add SGX MSRs to msr-index.h Jarkko Sakkinen
2017-11-28 17:22 ` Sean Christopherson
2017-11-28 20:48 ` Jarkko Sakkinen
2017-11-25 19:29 ` [PATCH v6 06/11] intel_sgx: driver for Intel Software Guard Extensions Jarkko Sakkinen
2017-11-26 17:33 ` Jarkko Sakkinen
2017-11-26 18:46 ` Jarkko Sakkinen
2017-11-26 19:01 ` Jarkko Sakkinen
2017-11-29 18:02 ` Jarkko Sakkinen
2017-11-28 19:07 ` Sean Christopherson
2017-11-30 17:32 ` Sean Christopherson
2017-12-04 8:59 ` Jarkko Sakkinen
2017-11-25 19:29 ` [PATCH v6 07/11] intel_sgx: ptrace() support Jarkko Sakkinen
2017-11-26 15:44 ` Jarkko Sakkinen
2017-11-26 15:50 ` Joe Perches
2017-11-26 16:53 ` Jarkko Sakkinen
2017-11-26 17:01 ` Jarkko Sakkinen
2017-11-25 19:29 ` [PATCH v6 08/11] intel_sgx: in-kernel launch enclave Jarkko Sakkinen
2017-11-27 9:58 ` Till Smejkal
2017-11-28 20:17 ` Jarkko Sakkinen
2017-11-28 22:38 ` Jarkko Sakkinen
2017-12-04 9:23 ` Jarkko Sakkinen
2017-11-25 19:29 ` [PATCH v6 09/11] fs/pipe.c: export create_pipe_files() and replace_fd() Jarkko Sakkinen
2017-11-28 14:35 ` Christoph Hellwig
2017-11-28 20:42 ` Jarkko Sakkinen
2017-11-28 21:05 ` Christoph Hellwig
2017-11-28 21:57 ` Jarkko Sakkinen
2017-11-29 23:13 ` Christoph Hellwig
2017-11-30 16:43 ` Jarkko Sakkinen
2017-11-30 18:38 ` James Bottomley
2017-12-04 9:00 ` Jarkko Sakkinen
2017-12-07 17:37 ` Jarkko Sakkinen
2017-12-08 13:05 ` Jarkko Sakkinen
2017-11-25 19:29 ` [PATCH v6 10/11] intel_sgx: glue code for in-kernel LE Jarkko Sakkinen
2017-12-13 23:34 ` Christopherson, Sean J
2017-11-25 19:29 ` [PATCH v6 11/11] intel_sgx: driver documentation Jarkko Sakkinen
2017-12-12 14:07 ` [PATCH v6 00/11] Intel SGX Driver Pavel Machek
2017-12-14 11:18 ` Jarkko Sakkinen
2017-12-19 23:33 ` Jarkko Sakkinen [this message]
2017-12-20 13:18 ` Jarkko Sakkinen
2018-01-04 14:17 ` Cedric Blancher
2018-01-04 14:27 ` Greg Kroah-Hartman
2018-01-04 19:18 ` Ozgur
2018-01-04 15:08 ` James Bottomley
2018-01-09 14:27 ` Jarkko Sakkinen
2018-02-08 8:46 ` Pavel Machek
2018-02-08 13:48 ` Jarkko Sakkinen
2017-12-27 10:30 Dr. Greg Wettstein
2017-12-27 20:46 ` Pavel Machek
2018-01-03 0:59 Dr. Greg Wettstein
2018-01-03 2:00 ` Christian Stroetmann
2018-01-03 9:48 ` Pavel Machek
2018-01-04 8:02 Dr. Greg Wettstein
2018-01-04 9:20 ` Christian Stroetmann
2018-01-04 9:06 Dr. Greg Wettstein
2018-01-09 14:25 ` Jarkko Sakkinen
2018-01-04 21:09 Dr. Greg Wettstein
2018-01-05 9:50 Dr. Greg Wettstein
2018-01-09 21:50 Dr. Greg Wettstein
2018-01-10 16:16 ` Jarkko Sakkinen
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