From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: "Roberto Sassu" <roberto.sassu@huaweicloud.com>,
"Mickaël Salaün" <mic@digikod.net>,
"Mimi Zohar" <zohar@linux.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>,
Christian Brauner <brauner@kernel.org>,
Kees Cook <keescook@chromium.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Paul Moore <paul@paul-moore.com>, Theodore Ts'o <tytso@mit.edu>,
Alejandro Colomar <alx@kernel.org>,
Aleksa Sarai <cyphar@cyphar.com>,
Andrew Morton <akpm@linux-foundation.org>,
Andy Lutomirski <luto@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
Casey Schaufler <casey@schaufler-ca.com>,
Christian Heimes <christian@python.org>,
Dmitry Vyukov <dvyukov@google.com>,
Eric Biggers <ebiggers@kernel.org>,
Eric Chiang <ericchiang@google.com>,
Fan Wu <wufan@linux.microsoft.com>,
Florian Weimer <fweimer@redhat.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
James Morris <jamorris@linux.microsoft.com>,
Jan Kara <jack@suse.cz>, Jann Horn <jannh@google.com>,
Jeff Xu <jeffxu@google.com>, Jonathan Corbet <corbet@lwn.net>,
Jordan R Abrahams <ajordanr@google.com>,
Lakshmi Ramasubramanian <nramas@linux.microsoft.com>,
Luca Boccassi <bluca@debian.org>,
Luis Chamberlain <mcgrof@kernel.org>,
"Madhavan T . Venkataraman" <madvenka@linux.microsoft.com>,
Matt Bobrowski <mattbobrowski@google.com>,
Matthew Garrett <mjg59@srcf.ucam.org>,
Matthew Wilcox <willy@infradead.org>,
Miklos Szeredi <mszeredi@redhat.com>,
Nicolas Bouchinet <nicolas.bouchinet@ssi.gouv.fr>,
Scott Shell <scottsh@microsoft.com>,
Shuah Khan <shuah@kernel.org>,
Stephen Rothwell <sfr@canb.auug.org.au>,
Steve Dower <steve.dower@python.org>,
Steve Grubb <sgrubb@redhat.com>,
Thibaut Sautereau <thibaut.sautereau@ssi.gouv.fr>,
Vincent Strubel <vincent.strubel@ssi.gouv.fr>,
Xiaoming Ni <nixiaoming@huawei.com>,
Yin Fengwei <fengwei.yin@intel.com>,
kernel-hardening@lists.openwall.com, linux-api@vger.kernel.org,
linux-fsdevel@vger.kernel.org, linux-integrity@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org
Subject: Re: [RFC PATCH v19 0/5] Script execution control (was O_MAYEXEC)
Date: Tue, 16 Jul 2024 12:12:49 -0400 [thread overview]
Message-ID: <ee1ae815b6e75021709612181a6a4415fda543a4.camel@HansenPartnership.com> (raw)
In-Reply-To: <9e3df65c2bf060b5833558e9f8d82dcd2fe9325a.camel@huaweicloud.com>
On Tue, 2024-07-16 at 17:57 +0200, Roberto Sassu wrote:
> But the Clip OS 4 patch does not cover the redirection case:
>
> # ./bash < /root/test.sh
> Hello World
>
> Do you have a more recent patch for that?
How far down the rabbit hole do you want to go? You can't forbid a
shell from executing commands from stdin because logging in then won't
work. It may be possible to allow from a tty backed file and not from
a file backed one, but you still have the problem of the attacker
manually typing in the script.
The saving grace for this for shells is that they pretty much do
nothing on their own (unlike python) so you can still measure all the
executables they call out to, which provides reasonable safety.
James
next prev parent reply other threads:[~2024-07-16 16:13 UTC|newest]
Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-04 19:01 Mickaël Salaün
2024-07-04 19:01 ` [RFC PATCH v19 1/5] exec: Add a new AT_CHECK flag to execveat(2) Mickaël Salaün
2024-07-05 0:04 ` Kees Cook
2024-07-05 17:53 ` Mickaël Salaün
2024-07-08 19:38 ` Kees Cook
2024-07-05 18:03 ` Florian Weimer
2024-07-06 14:55 ` Mickaël Salaün
2024-07-06 15:32 ` Florian Weimer
2024-07-08 8:56 ` Mickaël Salaün
2024-07-08 16:37 ` [PATCH] binfmt_elf: Fail execution of shared objects with ELIBEXEC (was: Re: [RFC PATCH v19 1/5] exec: Add a new AT_CHECK flag to execveat(2)) Florian Weimer
2024-07-08 17:34 ` [PATCH] binfmt_elf: Fail execution of shared objects with ELIBEXEC Eric W. Biederman
2024-07-08 17:59 ` Florian Weimer
2024-07-10 10:05 ` [PATCH] binfmt_elf: Fail execution of shared objects with ELIBEXEC (was: Re: [RFC PATCH v19 1/5] exec: Add a new AT_CHECK flag to execveat(2)) Mickaël Salaün
2024-07-08 16:08 ` [RFC PATCH v19 1/5] exec: Add a new AT_CHECK flag to execveat(2) Jeff Xu
2024-07-08 16:25 ` Florian Weimer
2024-07-08 16:40 ` Jeff Xu
2024-07-08 17:05 ` Mickaël Salaün
2024-07-08 17:33 ` Florian Weimer
2024-07-08 17:52 ` Jeff Xu
2024-07-09 9:18 ` Mickaël Salaün
2024-07-09 10:05 ` Florian Weimer
2024-07-09 20:42 ` Mickaël Salaün
2024-07-09 18:57 ` Jeff Xu
2024-07-09 20:41 ` Mickaël Salaün
2024-07-06 8:52 ` Andy Lutomirski
2024-07-07 9:01 ` Mickaël Salaün
2024-07-17 6:33 ` Jeff Xu
2024-07-17 8:26 ` Steve Dower
2024-07-17 10:00 ` Mickaël Salaün
2024-07-18 1:02 ` Andy Lutomirski
2024-07-18 12:22 ` Mickaël Salaün
2024-07-20 1:59 ` Andy Lutomirski
2024-07-20 11:43 ` Jarkko Sakkinen
2024-07-23 13:16 ` Mickaël Salaün
2024-07-23 13:16 ` Mickaël Salaün
2024-07-18 1:51 ` Jeff Xu
2024-07-18 12:23 ` Mickaël Salaün
2024-07-18 22:54 ` Jeff Xu
2024-07-17 10:01 ` Mickaël Salaün
2024-07-18 2:08 ` Jeff Xu
2024-07-18 12:24 ` Mickaël Salaün
2024-07-18 13:03 ` James Bottomley
2024-07-18 15:35 ` Mickaël Salaün
2024-07-19 1:29 ` Jeff Xu
2024-07-19 8:44 ` Mickaël Salaün
2024-07-19 14:16 ` Jeff Xu
2024-07-19 15:04 ` Mickaël Salaün
2024-07-19 15:27 ` Jeff Xu
2024-07-23 13:15 ` Mickaël Salaün
2024-08-05 18:35 ` Jeff Xu
2024-08-09 8:45 ` Mickaël Salaün
2024-08-09 16:15 ` Jeff Xu
2024-07-19 15:12 ` Jeff Xu
2024-07-19 15:31 ` Mickaël Salaün
2024-07-19 17:36 ` Jeff Xu
2024-07-23 13:15 ` Mickaël Salaün
2024-07-18 14:46 ` enh
2024-07-18 15:35 ` Mickaël Salaün
2024-07-04 19:01 ` [RFC PATCH v19 2/5] security: Add new SHOULD_EXEC_CHECK and SHOULD_EXEC_RESTRICT securebits Mickaël Salaün
2024-07-05 0:18 ` Kees Cook
2024-07-05 17:54 ` Mickaël Salaün
2024-07-05 21:44 ` Kees Cook
2024-07-05 22:22 ` Jarkko Sakkinen
2024-07-06 14:56 ` Mickaël Salaün
2024-07-06 17:28 ` Jarkko Sakkinen
2024-07-06 14:56 ` Mickaël Salaün
2024-07-18 14:16 ` Roberto Sassu
2024-07-18 16:20 ` Mickaël Salaün
2024-07-08 16:17 ` Jeff Xu
2024-07-08 17:53 ` Jeff Xu
2024-07-08 18:48 ` Mickaël Salaün
2024-07-08 21:15 ` Jeff Xu
2024-07-08 21:25 ` Steve Dower
2024-07-08 22:07 ` Jeff Xu
2024-07-09 20:42 ` Mickaël Salaün
2024-07-09 21:57 ` Jeff Xu
2024-07-10 9:58 ` Mickaël Salaün
2024-07-10 16:26 ` Kees Cook
2024-07-11 8:57 ` Mickaël Salaün
2024-07-16 15:02 ` Jeff Xu
2024-07-16 15:10 ` Steve Dower
2024-07-16 15:15 ` Mickaël Salaün
2024-07-16 15:18 ` Jeff Xu
2024-07-10 16:32 ` Steve Dower
2024-07-20 2:06 ` Andy Lutomirski
2024-07-23 13:15 ` Mickaël Salaün
2024-07-04 19:01 ` [RFC PATCH v19 3/5] selftests/exec: Add tests for AT_CHECK and related securebits Mickaël Salaün
2024-07-04 19:01 ` [RFC PATCH v19 4/5] selftests/landlock: Add tests for execveat + AT_CHECK Mickaël Salaün
2024-07-04 19:01 ` [RFC PATCH v19 5/5] samples/should-exec: Add set-should-exec Mickaël Salaün
2024-07-08 19:40 ` Mimi Zohar
2024-07-09 20:42 ` Mickaël Salaün
2024-07-08 20:35 ` [RFC PATCH v19 0/5] Script execution control (was O_MAYEXEC) Mimi Zohar
2024-07-09 20:43 ` Mickaël Salaün
2024-07-16 15:57 ` Roberto Sassu
2024-07-16 16:12 ` James Bottomley [this message]
2024-07-16 17:31 ` Mickaël Salaün
2024-07-18 16:21 ` Mickaël Salaün
[not found] ` <E608EDB8-72E8-4791-AC9B-8FF9AC753FBE@sempervictus.com>
2024-07-16 17:47 ` Mickaël Salaün
2024-07-17 17:59 ` Boris Lukashev
2024-07-18 13:00 ` Mickaël Salaün
2024-07-15 20:16 ` Jonathan Corbet
2024-07-16 7:13 ` Mickaël Salaün
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