From: jwcart2 <jwcart2@tycho.nsa.gov>
To: "Burgener, Daniel" <dburgener@tresys.com>,
"selinux-refpolicy@vger.kernel.org"
<selinux-refpolicy@vger.kernel.org>
Subject: Re: [Non-DoD Source] SELint
Date: Thu, 16 Jan 2020 14:52:31 -0500 [thread overview]
Message-ID: <f0ee635f-e68f-23cb-451a-03e3066d7a67@tycho.nsa.gov> (raw)
In-Reply-To: <53806485-18fe-0cd8-ca16-9cdb495cdb92@tresys.com>
On 1/16/20 9:37 AM, Burgener, Daniel wrote:
> Hello,
>
> We have created a tool a that I think people on this list may find very
> useful as they do refpolicy related work. It's called SELint and does
> static code analysis on refpolicy style SELinux policy. You can find
> the tool on our git repo here:
>
> https://github.com/TresysTechnology/selint
>
> It currently has 13 checks for common policy issues, and we hope to add
> more going forward.
>
> I submitted a pull request to the refpolicy github this morning that
> fixes some of the issues reported by the tool, and hope to continue
> submitting more over the next few days.
>
> -Daniel
>
Interesting work. Some of the tests are similar to those in a tool I created in
2018, selpoltools (https://github.com/jwcart2/selpoltools), but I did not think
of doing a check for a potentially unescaped regex character. I like that your
tool is written in c and that you can disable individual checks with a command
line option.
A couple of comments (which you are probably aware of)
- You will need to teach your program about object_r at some point.
- I ran it on a Refpolicy source tree from earlier in the year and it complained
about system_u being a non-existent user in the fc files, even though it is
defined in users.
- I am a little bit confused by what the line out of order (C-001) wants. For
example, I get the following two warnings
ipsec.te: 118: (C): Line out of order. It is before line 124 that calls
an interface located in the kernel module. (C-001)
ipsec.te: 119: (C): Line out of order. It is before line 124 that is in a
different section. (This node is in the section for ipsec_mgmt_t rules and the
other is in the section for ipsec_t rules.) (C-001)
118 corecmd_shell_domtrans(ipsec_t, ipsec_mgmt_t)
119 allow ipsec_mgmt_t ipsec_t:fd use;
. . .
124 kernel_read_kernel_sysctls(ipsec_t)
125 kernel_rw_net_sysctls(ipsec_t)
126 kernel_* ...
I am guessing that it wants the ipsec_t rules before the ipsec_mgmt_t rules?
I wonder why there aren't similar warnings referring to lines 125-134 which also
refer to kernel interfaces. I am guessing that it recognizes line 124 as the
start of the ipsec_t section?
All in all, it looks promising.
Jim
--
James Carter <jwcart2@tycho.nsa.gov>
National Security Agency
prev parent reply other threads:[~2020-01-16 20:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-16 14:37 SELint Burgener, Daniel
2020-01-16 19:52 ` jwcart2 [this message]
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