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Originally published in Queue vol. 11, no. 1
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Comments

(newest first)

Paul Pathiakis | Sun, 31 Mar 2013 17:23:09 UTC

Robert,

Informative (very), well-written, well-presented and quite incisive. It makes me want to understand MAC framework on a deeper level. The history and future of the MAC framework seems to be quite robust and comprehensive. Although the two vendors of note, Apple and Juniper, are mentioned to be using it and contributing back to the community, are there any other of the known, large corporate vendors (EMC's Isilon, NetApp, Cisco, etc) doing the same? How much overhead does this level of object control come with? (It seems that it would impose quite a bit, however, due to the 'options MAC' allowing you to pick and choose the modules to be kernel loaded at boot time, an administrator or security manager could impose restrictions on only certain functionality/objects, true?) Also, for readers who are not aware of the basics: www.freebsd.org/doc/handbook/mac-initial.html


blymn | Thu, 31 Jan 2013 12:33:42 UTC

Just a minor historical note - the Junos signed binary execution was based on the verifiedexec feature from NetBSD. Juniper ported the code from NetBSD to FreeBSD and extended the capabilities to change the system from a executable validation system into one that supported signed binaries - something that NetBSD could not do at the time for lack of a BSD licenced crypto framework due to the framework having to be embedded into the kernel and all kernel code having to be BSD licenced.


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