Messages in this thread | | | Date | Wed, 16 Dec 2009 16:59:38 +0100 | From | Andi Kleen <> | Subject | Re: [PATCH] Security: Add prctl(PR_{GET,SET}_NETWORK) interface. |
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On Wed, Dec 16, 2009 at 10:32:43AM -0500, Michael Stone wrote: > Daniel Bernstein has observed [1] that security-conscious userland processes > may benefit from the ability to irrevocably remove their ability to create, > bind, connect to, or send messages except in the case of previously connected > sockets or AF_UNIX filesystem sockets. We provide this facility by implementing > support for a new prctl(PR_SET_NETWORK) flag named PR_NETWORK_OFF. > > This facility is particularly attractive to security platforms like OLPC > Bitfrost [2] and to isolation programs like Rainbow [3] and Plash [4].
What would stop them from ptracing someone else running under the same uid who still has the network access? If you ptrace you can do arbitary system calls.
-Andi
-- ak@linux.intel.com -- Speaking for myself only.
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