* RFC: Is SM_SIMU_CRASH (in rpc.statd) needed?
@ 2010-06-22 10:03 Steve Dickson
0 siblings, 0 replies; 4+ messages in thread
From: Steve Dickson @ 2010-06-22 10:03 UTC (permalink / raw)
To: Linux NFS Mailing list
Hello,
Does anybody know who uses SM_SIMU_CRASH and is it
still needed? I'm getting some push back from our
security folks to plug this DoS hole up...
steved.
^ permalink raw reply [flat|nested] 4+ messages in thread
* RFC: Is SM_SIMU_CRASH (in rpc.statd) needed?
@ 2010-06-22 14:34 Chuck Lever
2010-06-22 16:33 ` Steve Dickson
0 siblings, 1 reply; 4+ messages in thread
From: Chuck Lever @ 2010-06-22 14:34 UTC (permalink / raw)
To: Steve Dickson, NFSv3 list
> Does anybody know who uses SM_SIMU_CRASH and is it
> still needed? I'm getting some push back from our
> security folks to plug this DoS hole up...
How is it a DoS? statd ignores any SM_SIMU_CRASH from a non-loopback
address that does not use a privileged port. To invoke it, you
basically have to be a privileged local user.
Right now, no one uses it, but I think we should reserve the right to
use it in the future. This could be part of a more robust interface
between lockd and statd.
--
Chuck Lever
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: RFC: Is SM_SIMU_CRASH (in rpc.statd) needed?
2010-06-22 14:34 Chuck Lever
@ 2010-06-22 16:33 ` Steve Dickson
[not found] ` <4C20E5D7.80908-AfCzQyP5zfLQT0dZR+AlfA@public.gmane.org>
0 siblings, 1 reply; 4+ messages in thread
From: Steve Dickson @ 2010-06-22 16:33 UTC (permalink / raw)
To: Chuck Lever; +Cc: NFSv3 list
On 06/22/2010 10:34 AM, Chuck Lever wrote:
>> Does anybody know who uses SM_SIMU_CRASH and is it
>> still needed? I'm getting some push back from our
>> security folks to plug this DoS hole up...
>
> How is it a DoS? statd ignores any SM_SIMU_CRASH from a non-loopback
> address that does not use a privileged port. To invoke it, you
> basically have to be a privileged local user.
It happens during an ISS scan....
>
> Right now, no one uses it, but I think we should reserve the right to
> use it in the future. This could be part of a more robust interface
> between lockd and statd.
hmm... how can having a way of bringing down a daemon, make it more robust?
steved.
^ permalink raw reply [flat|nested] 4+ messages in thread
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2010-06-22 10:03 RFC: Is SM_SIMU_CRASH (in rpc.statd) needed? Steve Dickson
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2010-06-22 14:34 Chuck Lever
2010-06-22 16:33 ` Steve Dickson
[not found] ` <4C20E5D7.80908-AfCzQyP5zfLQT0dZR+AlfA@public.gmane.org>
2010-06-22 16:58 ` Chuck Lever
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