From: James Morris <james.l.morris@oracle.com>
To: Patrick Ohly <patrick.ohly@intel.com>
Cc: Matthew Garrett <mjg59@google.com>,
linux-integrity <linux-integrity@vger.kernel.org>
Subject: Re: IMA appraisal master plan? (was: Re: [PATCH V6] EVM: Add support for portable signature format)
Date: Thu, 16 Nov 2017 11:02:30 +1100 (AEDT) [thread overview]
Message-ID: <alpine.LFD.2.20.1711161101360.27132@localhost> (raw)
In-Reply-To: <1510770065.5979.21.camel@intel.com>
On Wed, 15 Nov 2017, Patrick Ohly wrote:
> I have some experience with SMACK, but not with Apparmor. At least with
> SMACK the problem is that the LSM depends on integrity protection of
> the xattrs, but the integrity protection itself depends on the LSM, so
> there's a cycle. An attacker can much too easily make offline changes
> which then defeat whatever IMA policy the system might be using.
Isn't this what EVM is supposed to mitigate?
Can you explain the offline attack in this scenario?
--
James Morris
<james.l.morris@oracle.com>
next prev parent reply other threads:[~2017-11-16 0:02 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-07 15:17 [PATCH V6] EVM: Add support for portable signature format Matthew Garrett
2017-11-08 19:37 ` Mimi Zohar
2017-11-15 17:26 ` IMA appraisal master plan? (was: Re: [PATCH V6] EVM: Add support for portable signature format) Patrick Ohly
2017-11-15 17:58 ` Matthew Garrett
2017-11-15 18:21 ` Patrick Ohly
2017-11-15 18:28 ` Matthew Garrett
2017-11-16 0:02 ` James Morris [this message]
2017-11-16 0:05 ` Matthew Garrett
2017-11-16 2:13 ` Mimi Zohar
2017-11-16 9:23 ` IMA appraisal master plan? Roberto Sassu
2017-11-16 10:20 ` Patrick Ohly
2017-11-16 13:13 ` Mimi Zohar
2017-11-16 14:18 ` Roberto Sassu
2017-11-16 13:06 ` Mimi Zohar
2017-11-17 12:20 ` Roberto Sassu
2017-11-17 13:42 ` Mimi Zohar
2017-11-17 14:32 ` Roberto Sassu
2017-11-17 15:58 ` Stephen Smalley
2017-11-17 20:09 ` Safford, David (GE Global Research, US)
2017-11-18 19:29 ` Casey Schaufler
2017-11-19 20:47 ` James Morris
2017-11-20 10:20 ` Patrick Ohly
2017-11-20 14:59 ` Mimi Zohar
2017-11-20 16:15 ` Patrick Ohly
2017-11-21 10:05 ` James Morris
2017-11-21 9:33 ` Roberto Sassu
2017-11-21 14:05 ` Mimi Zohar
2017-11-21 15:25 ` Roberto Sassu
2017-11-21 15:53 ` Mimi Zohar
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