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Date: Wed, 12 Dec 2018 21:13:16 +0100
From: Florian Weimer <fweimer@...hat.com>
To: James Morris <jmorris@...ei.org>
Cc: Mickaël Salaün <mic@...ikod.net>,
linux-kernel@...r.kernel.org, Al Viro <viro@...iv.linux.org.uk>,
Jonathan Corbet <corbet@....net>, Kees Cook <keescook@...omium.org>,
Matthew Garrett <mjg59@...gle.com>, Michael Kerrisk
<mtk.manpages@...il.com>, Mickaël Salaün
<mickael.salaun@....gouv.fr>, Mimi Zohar <zohar@...ux.ibm.com>, Philippe
Trébuchet <philippe.trebuchet@....gouv.fr>, Shuah Khan
<shuah@...nel.org>, Thibaut Sautereau <thibaut.sautereau@....gouv.fr>,
Vincent Strubel <vincent.strubel@....gouv.fr>, Yves-Alexis Perez
<yves-alexis.perez@....gouv.fr>, kernel-hardening@...ts.openwall.com,
linux-api@...r.kernel.org, linux-security-module@...r.kernel.org,
linux-fsdevel@...r.kernel.org
Subject: Re: [RFC PATCH v1 0/5] Add support for O_MAYEXEC
* James Morris:
> If you're depending on the script interpreter to flag that the user may
> execute code, this seems to be equivalent in security terms to depending
> on the user. e.g. what if the user uses ptrace and clears O_MAYEXEC?
The argument I've heard is this: Using ptrace (and adding the +x
attribute) are auditable events.
Florian
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