[PATCH 0/2] audit: log binding and unbinding to netlink multicast socket

[PATCH 0/2] audit: log binding and unbinding to netlink multicast socket

[Steve Grubb]

Hello,

I am resurrecting this old patch. Its been cleaned up by adding a simple task 
logging function which should, in the future, serve almost all kernel logging 
needs. The cleaned up bind and unbind functions call it to create the preamble 
and then finish with specific data items for bind/unbinding.

In essence, this patch logs connecting and unconnecting to the audit netlink 
multicast socket. This is needed so that during investigations a security 
officer can tell who or what had access to the audit trail. This helps to meet 
the FAU_SAR.2 SFR for Common Criteria.

Sample output:

type=UNKNOWN[1329] msg=audit(1437683193.897:725): pid=10068 uid=0 auid=4325 
tty=pts0 ses=1 subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 
comm="test" exe="/home/sgrubb/test/multicast/test" nlnk-grp=1 op=connect res=1
type=UNKNOWN[1329] msg=audit(1437683308.055:741): pid=10068 uid=0 auid=4325 
tty=pts0 ses=1 subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 
comm="test" exe=(null) nlnk-grp=1 op=disconnect res=1

Signed-off-by: Steve Grubb <sgrubb@redhat.com>

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Re: [PATCH 0/2] audit: log binding and unbinding to netlink multicast socket

[Paul Moore]

On Thu, Jul 23, 2015 at 4:45 PM, Steve Grubb <sgrubb@redhat.com> wrote:
> Hello,
>
> I am resurrecting this old patch. Its been cleaned up by adding a simple task
> logging function which should, in the future, serve almost all kernel logging
> needs. The cleaned up bind and unbind functions call it to create the preamble
> and then finish with specific data items for bind/unbinding.
>
> In essence, this patch logs connecting and unconnecting to the audit netlink
> multicast socket. This is needed so that during investigations a security
> officer can tell who or what had access to the audit trail. This helps to meet
> the FAU_SAR.2 SFR for Common Criteria.

Hi Steve,

I knew we would get you writing kernel patches eventually ;)

A little birdie mentioned to me offlist that there are issues with
application bind/unbind events not being audited based on how they do
the audit, have you run into this in your testing of this patch?

-- 
paul moore
www.paul-moore.com

[PATCH 0/2] audit: log binding and unbinding to netlink multicast socket

[Steve Grubb]

Hello,

I am resurrecting this old patch. Its been cleaned up by adding a simple task 
logging function which should, in the future, serve almost all kernel logging 
needs. The cleaned up bind and unbind functions call it to create the preamble 
and then finish with specific data items for bind/unbinding.

In essence, this patch logs connecting and disconnecting to the audit netlink 
multicast socket. This is needed so that during investigations a security 
officer can tell who or what had access to the audit trail. This helps to meet 
the FAU_SAR.2 SFR for Common Criteria.

Sample output:
type=UNKNOWN[1330] audit(1480532106.644:2): pid=1 uid=0 auid=4294967295 
tty=(none) ses=4294967295 subj=kernel comm="systemd" exe="/usr/lib/systemd/
systemd" nlnk-grp=1 op=connect res=1

Signed-off-by: Steve Grubb <sgrubb@redhat.com>

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