netdev - Re: [Security] inet_diag insufficient validation?

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Date:	Wed, 15 Jun 2011 10:35:24 -0400
From:	Dan Rosenberg <drosenberg@...curity.com>
To:	Eugene Teo <eugeneteo@...nel.sg>
Cc:	davem@...emloft.net, kuznet@....inr.ac.ru, netdev@...r.kernel.org,
	security@...nel.org, Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: Re: [Security] inet_diag insufficient validation?

On Fri, 2011-06-03 at 14:55 +0800, Eugene Teo wrote:
> Cc'ed acme.
> 
> On Wed, Jun 1, 2011 at 11:40 PM, Dan Rosenberg <drosenberg@...curity.com> wrote:
> > It seems to me that the auditing performed by inet_diag_bc_audit() is
> > insufficient to prevent pathological INET_DIAG bytecode from doing bad
> > things.
> >
> > Firstly, it's possible to cause an infinite loop in inet_diag_bc_audit()
> > with a INET_DIAG_BC_JMP opcode with a "yes" value of 0.  The valid_cc()
> > function, also called from here, seems suspicious as well.
> >

Any chance of getting this fixed?  I have a reproducer available if
necessary.

-Dan

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