From: Paul Moore <paul@paul-moore.com>
To: Fan Wu <wufan@linux.microsoft.com>
Cc: Bagas Sanjaya <bagasdotme@gmail.com>,
corbet@lwn.net, zohar@linux.ibm.com, jmorris@namei.org,
serge@hallyn.com, tytso@mit.edu, ebiggers@kernel.org,
axboe@kernel.dk, agk@redhat.com, snitzer@kernel.org,
eparis@redhat.com, linux-doc@vger.kernel.org,
linux-integrity@vger.kernel.org,
linux-security-module@vger.kernel.org, fsverity@lists.linux.dev,
linux-block@vger.kernel.org, dm-devel@lists.linux.dev,
audit@vger.kernel.org, linux-kernel@vger.kernel.org,
Deven Bowers <deven.desai@linux.microsoft.com>
Subject: Re: [PATCH v18 20/21] Documentation: add ipe documentation
Date: Tue, 14 May 2024 15:50:09 -0400 [thread overview]
Message-ID: <CAHC9VhQewDL4cWXSiAgzvrHa8N5rd6TbhSCM3jRp29=Kmr3m-Q@mail.gmail.com> (raw)
In-Reply-To: <ab7054cd-affd-47c3-bd98-2cf47d6a6376@linux.microsoft.com>
On Sat, May 4, 2024 at 4:13 PM Fan Wu <wufan@linux.microsoft.com> wrote:
> On 5/4/2024 1:04 AM, Bagas Sanjaya wrote:
> > On Fri, May 03, 2024 at 03:32:30PM -0700, Fan Wu wrote:
> >> +IPE does not mitigate threats arising from malicious but authorized
> >> +developers (with access to a signing certificate), or compromised
> >> +developer tools used by them (i.e. return-oriented programming attacks).
> >> +Additionally, IPE draws hard security boundary between userspace and
> >> +kernelspace. As a result, IPE does not provide any protections against a
> >> +kernel level exploit, and a kernel-level exploit can disable or tamper
> >> +with IPE's protections.
> >
> > So how to mitigate kernel-level exploits then?
>
> One possible way is to use hypervisor to protect the kernel integrity.
> https://github.com/heki-linux is one project on this direction. Perhaps
> I should also add this link to the doc.
I wouldn't spend a lot of time on kernel exploits in the IPE
documentation as it is out of scope for IPE. In face, I would say
just that in the last sentence in the paragraph above:
"As a result, kernel-level exploits are considered outside the scope
of IPE and mitigation is left to other mechanisms."
(or something similar)
--
paul-moore.com
next prev parent reply other threads:[~2024-05-14 19:50 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-03 22:32 [PATCH v18 00/21] Integrity Policy Enforcement LSM (IPE) Fan Wu
2024-05-03 22:32 ` [PATCH v18 01/21] security: add ipe lsm Fan Wu
2024-05-03 22:32 ` [PATCH v18 02/21] ipe: add policy parser Fan Wu
2024-05-03 22:32 ` [PATCH v18 03/21] ipe: add evaluation loop Fan Wu
2024-05-03 22:32 ` [PATCH v18 04/21] ipe: add LSM hooks on execution and kernel read Fan Wu
2024-05-03 22:32 ` [PATCH v18 05/21] initramfs|security: Add a security hook to do_populate_rootfs() Fan Wu
2024-05-03 22:32 ` [PATCH v18 06/21] ipe: introduce 'boot_verified' as a trust provider Fan Wu
2024-05-03 22:32 ` [PATCH v18 07/21] security: add new securityfs delete function Fan Wu
2024-05-03 22:32 ` [PATCH v18 08/21] ipe: add userspace interface Fan Wu
2024-05-03 22:32 ` [PATCH v18 09/21] uapi|audit|ipe: add ipe auditing support Fan Wu
2024-05-03 22:32 ` [PATCH v18 10/21] ipe: add permissive toggle Fan Wu
2024-05-03 22:32 ` [PATCH v18 11/21] block,lsm: add LSM blob and new LSM hooks for block device Fan Wu
2024-05-03 22:32 ` [PATCH v18 12/21] dm: add finalize hook to target_type Fan Wu
2024-05-08 17:17 ` Mikulas Patocka
2024-05-08 22:30 ` Fan Wu
2024-05-09 17:07 ` Mikulas Patocka
2024-05-17 19:13 ` Fan Wu
2024-05-20 12:31 ` Mikulas Patocka
2024-05-21 21:42 ` Fan Wu
2024-05-03 22:32 ` [PATCH v18 13/21] dm verity: expose root hash digest and signature data to LSMs Fan Wu
2024-05-03 22:32 ` [PATCH v18 14/21] ipe: add support for dm-verity as a trust provider Fan Wu
2024-05-03 22:32 ` [PATCH v18 15/21] security: add security_inode_setintegrity() hook Fan Wu
2024-05-03 22:32 ` [PATCH v18 16/21] fsverity: expose verified fsverity built-in signatures to LSMs Fan Wu
2024-05-14 19:55 ` Paul Moore
2024-05-03 22:32 ` [PATCH v18 17/21] ipe: enable support for fs-verity as a trust provider Fan Wu
2024-05-03 22:32 ` [PATCH v18 18/21] scripts: add boot policy generation program Fan Wu
2024-05-03 22:32 ` [PATCH v18 19/21] ipe: kunit test for parser Fan Wu
2024-05-03 22:32 ` [PATCH v18 20/21] Documentation: add ipe documentation Fan Wu
2024-05-04 8:04 ` Bagas Sanjaya
2024-05-04 20:13 ` Fan Wu
2024-05-05 0:15 ` Bagas Sanjaya
2024-05-14 19:50 ` Paul Moore [this message]
2024-05-03 22:32 ` [PATCH v18 21/21] MAINTAINERS: ipe: add ipe maintainer information Fan Wu
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