linux-kernel - Re: [PATCH 0/6][v2] audit: implement multicast socket for journald

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Date:	Thu, 24 Apr 2014 10:59:04 -0400
From:	Daniel J Walsh <dwalsh@...hat.com>
To:	Eric Paris <eparis@...isplace.org>
CC:	Linux Netdev List <netdev@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Eric Paris <eparis@...hat.com>,
	LSM List <linux-security-module@...r.kernel.org>,
	linux-audit@...hat.com, SE-Linux <selinux@...ho.nsa.gov>,
	jamal@...atatu.com, Steve Grubb <sgrubb@...hat.com>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH 0/6][v2] audit: implement multicast socket for journald

I don't disagree.  I would think the real solution to this would be to
not allow sysadm_t to get to SystemHigh, where all of the logging data
will be stored.

On 04/24/2014 09:22 AM, Eric Paris wrote:
> They would be equivalent if and only if journald had CAP_AUDIT_READ.
>
> I suggest you take CAP_AUDIT_READ away from journald on systems which
> need the secadm/sysadmin split (which is a ridiculously stupid split
> anyway, but who am I to complain?)
>
> On Wed, Apr 23, 2014 at 11:52 AM, Daniel J Walsh <dwalsh@...hat.com> wrote:
>> Meaning looking at the journal would be equivalent to looking at
>> /var/log/audit/audit.log.
>>
>>
>> On 04/23/2014 11:37 AM, Eric Paris wrote:
>>> On Wed, 2014-04-23 at 11:36 -0400, Daniel J Walsh wrote:
>>>> I guess the problem would be that the sysadm_t would be able to look at
>>>> the journal which would now contain the audit content.
>>> right.  so include it in the sysadm_secadm bool
>>>
>>>> On 04/23/2014 10:42 AM, Eric Paris wrote:
>>>>> On Wed, 2014-04-23 at 09:40 -0400, Daniel J Walsh wrote:
>>>>>> Here are the capabilities we currently give to sysadm_t with
>>>>>> sysadm_secadm    1.0.0    Disabled
>>>>>>
>>>>>>    allow sysadm_t sysadm_t : capability { chown dac_override
>>>>>> dac_read_search fowner fsetid kill setgid setuid setpcap linux_immutable
>>>>>> net_bind_service net_broadcast net_admin net_raw ipc_lock ipc_owner
>>>>>> sys_rawio sys_chroot sys_ptrace sys_pacct sys_admin sys_boot sys_nice
>>>>>> sys_resource sys_time sys_tty_config mknod lease audit_write setfcap } ;
>>>>>>    allow sysadm_t sysadm_t : capability { setgid setuid sys_chroot }
>>>>>>
>>>>>>    allow sysadm_t sysadm_t : capability2 { syslog block_suspend } ;
>>>>>>
>>>>>> cap_audit_write might be a problem?
>>>>> cap_audit_write is fine.
>>>>>
>>>>> syslogd_t (aka journal) is going to need the new permission
>>>>> cap_audit_read.  Also, as steve pointed out, someone may be likely to
>>>>> want to be able to disable that permission easily.
>>>>>
>>>>> -Eric
>>>>>
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