From: Daniel J Walsh <dwalsh@redhat.com>
To: Eric Paris <eparis@redhat.com>, Steve Grubb <sgrubb@redhat.com>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org, linux-audit@redhat.com,
selinux@tycho.nsa.gov, jamal@mojatatu.com, davem@davemloft.net
Subject: Re: [PATCH 0/6][v2] audit: implement multicast socket for journald
Date: Wed, 23 Apr 2014 09:40:34 -0400 [thread overview]
Message-ID: <5357C2D2.5060700@redhat.com> (raw)
In-Reply-To: <1398225475.750.7.camel@localhost>
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?
On 04/22/2014 11:57 PM, Eric Paris wrote:
> On Tue, 2014-04-22 at 22:25 -0400, Steve Grubb wrote:
>> On Tuesday, April 22, 2014 09:31:52 PM Richard Guy Briggs wrote:
>>> This is a patch set Eric Paris and I have been working on to add a
>>> restricted capability read-only netlink multicast socket to kernel audit to
>>> enable userspace clients such as systemd/journald to receive audit logs, in
>>> addition to the bidirectional auditd userspace client.
>> Do have the ability to separate of secadm_r and sysadm_r? By allowing this, we
>> will leak to a sysadmin that he is being audited by the security officer. In a
>> lot of cases, they are one in the same person. But for others, they are not. I
>> have a feeling this will cause problems for MLS systems.
> Why? This requires CAP_AUDIT_READ. Just don't give CAP_AUDIT_READ to
> places you don't want to have read permission. Exactly the same as you
> don't give CAP_AUDIT_CONTROL to sysadm_r. (If we are giving
> CAP_AUDIT_CONTROL to sysadm_r and you think that any file protections
> on /var/log/audit/audit.log are adequate we are fooling ourselves!)
>
>> Also, shouldn't we have an audit event for every attempt to connect to this
>> socket? We really need to know where this information is getting leaked to.
> We certainly can. What would you like to see in that event?
>
> -Eric
>
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next prev parent reply other threads:[~2014-04-23 13:40 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-21 16:39 [PATCH] netlink: have netlink per-protocol bind function return an error code Richard Guy Briggs
2014-03-23 4:50 ` David Miller
2014-03-24 14:38 ` Richard Guy Briggs
2014-03-24 18:34 ` Richard Guy Briggs
2014-03-24 18:35 ` [PATCH][v3] " Richard Guy Briggs
2014-03-24 19:37 ` [PATCH][v4] " Richard Guy Briggs
2014-03-24 20:59 ` [PATCH][v5] " Richard Guy Briggs
2014-03-26 19:52 ` David Miller
2014-03-26 20:09 ` v6 superceded it [was: Re: [PATCH][v5] netlink: have netlink per-protocol bind function return an error code.] Richard Guy Briggs
2014-03-25 12:50 ` [PATCH][v6] netlink: have netlink per-protocol bind function return an error code Richard Guy Briggs
2014-03-26 20:46 ` David Miller
2014-03-26 23:13 ` Patrick McHardy
2014-03-25 13:11 ` unbind [was: Re: [PATCH] netlink: have netlink per-protocol bind function return] " Richard Guy Briggs
2014-04-01 14:14 ` [PATCH 0/3] netlink: per-protocol bind fixup/enhancement set Richard Guy Briggs
2014-04-01 14:14 ` [PATCH 1/3] netlink: simplify nfnetlink_bind Richard Guy Briggs
2014-04-01 14:14 ` [PATCH 2/3][v7] netlink: have netlink per-protocol bind function return an error code Richard Guy Briggs
2014-04-01 14:14 ` [PATCH 3/3] netlink: implement unbind to netlink_setsockopt NETLINK_DROP_MEMBERSHIP Richard Guy Briggs
2014-04-01 21:33 ` [PATCH 0/3] netlink: per-protocol bind fixup/enhancement set David Miller
2014-04-01 22:12 ` Richard Guy Briggs
2014-04-01 22:21 ` David Miller
2014-04-18 17:34 ` [PATCH 0/6] audit: implement multicast socket for journald Richard Guy Briggs
2014-04-18 17:34 ` [PATCH 1/6] netlink: simplify nfnetlink_bind Richard Guy Briggs
2014-04-18 17:34 ` [PATCH 2/6] netlink: have netlink per-protocol bind function return an error code Richard Guy Briggs
2014-04-22 20:19 ` David Miller
2014-04-23 1:30 ` Richard Guy Briggs
2014-04-23 1:31 ` [PATCH 0/6][v2] audit: implement multicast socket for journald Richard Guy Briggs
2014-04-23 1:31 ` [PATCH 1/6][v2] netlink: simplify nfnetlink_bind Richard Guy Briggs
2014-04-23 1:31 ` [PATCH 2/6][v2] netlink: have netlink per-protocol bind function return an error code Richard Guy Briggs
2014-04-23 1:31 ` [PATCH 3/6][v2] netlink: implement unbind to netlink_setsockopt NETLINK_DROP_MEMBERSHIP Richard Guy Briggs
2014-04-23 1:31 ` [PATCH 4/6][v2] audit: add netlink audit protocol bind to check capabilities on multicast join Richard Guy Briggs
2014-04-23 1:31 ` [PATCH 5/6][v2] audit: add netlink multicast group for log read Richard Guy Briggs
2014-04-23 1:31 ` [PATCH 6/6][v2] audit: send multicast messages only if there are listeners Richard Guy Briggs
2014-04-23 1:43 ` [PATCH 0/6][v2] audit: implement multicast socket for journald David Miller
2014-04-23 1:49 ` Richard Guy Briggs
2014-04-23 3:55 ` David Miller
2014-04-23 2:25 ` Steve Grubb
2014-04-23 3:57 ` Eric Paris
2014-04-23 13:40 ` Daniel J Walsh [this message]
2014-04-23 14:42 ` Eric Paris
2014-04-23 15:36 ` Daniel J Walsh
2014-04-23 15:37 ` Eric Paris
2014-04-23 15:52 ` Daniel J Walsh
2014-04-24 13:22 ` Eric Paris
2014-04-24 14:59 ` Daniel J Walsh
2014-04-24 15:03 ` Eric Paris
2014-04-24 16:03 ` Daniel J Walsh
2014-04-18 17:34 ` [PATCH 3/6] netlink: implement unbind to netlink_setsockopt NETLINK_DROP_MEMBERSHIP Richard Guy Briggs
2014-04-18 17:34 ` [PATCH 4/6] audit: add netlink audit protocol bind to check capabilities on multicast join Richard Guy Briggs
2014-04-18 17:34 ` [PATCH 5/6] audit: add netlink multicast group for log read Richard Guy Briggs
2014-04-18 17:34 ` [PATCH 6/6] audit: send multicast messages only if there are listeners Richard Guy Briggs
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