Re: EXT :Re: CD Burner Auditing
On Apr 22, 2014, at 6:11 PM, Steve Grubb <sgrubb(a)redhat.com> wrote:
On Wednesday, April 23, 2014 08:00:47 AM Burn Alting wrote:
> Steve,
>
> The main challenge for this solution is the definition of all audit
> events that imply removable media has been attached.
These are all hotplug events. Udev should see them all.
While not exactly targeting the same data egress vector, we utilize a set of udev scripts
to monitor USB device insertions while having the usb_storage module removed.
You can find more information https://github.com/RedHatGov/rhel6-hardening/pull/1
I haven’t done any investigation when a USB CD/DVD Writer is inserted though. Nor have I
investigated what events are triggered when a blank CD is inserted in to a CD writer.
Thought this might help.
-josh
> Juraj's example of monitoring for mount system calls covers the edge case of
> copying to/from mounted devices (given you also identify removable devices
> mounted as opposed to say network mounts), but it would not cover the
> edge case of say dd'ing to a raw umounted device.
>
> By the way, linking to
> http://people.redhat.com/sgrubb/audit/reactive/reactive-audit-thesis.pdf
> results in
Fixed. Thanks.
-Steve
> On Tue, 2014-04-22 at 16:39 -0400, Steve Grubb wrote:
>> On Tuesday, April 22, 2014 04:06:05 PM Steve Grubb wrote:
>>> On Tuesday, April 22, 2014 03:44:45 PM Boyce, Kevin P. wrote:
>>>> Does the audit subsystem have the ability to dynamically create new
>>>> auditing rules using another event as the trigger?
>>>
>>> There was a patch for a reactive plugin sent to the list a number of
>>> years
>>> ago. The patch was too big and bounced, but I was cc'ed and have a copy.
>>> I
>>> have not had the time to review it to see if its maintainable,
>>> supportable,
>>> and exactly what I'd want. It's actually pretty well documented. I
could
>>> probably make it available off my people page since its too large for
>>> the
>>> mail list.
>>
>> http://people.redhat.com/sgrubb/audit/reactive/
>>
>> I have not reviewed the patch. I don't know if it still compiles or needs
>> changes. I am very interested in the topic of being able to load more
>> rules to watch something closer when certain things occur. If you look at
>> the pdf, one of the use cases it assists in is auditing files on
>> removable media.
>>
>> I would like to hear feedback on this patch to see what others think.
>>
>> -Steve
>>
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