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landonfuller's profile
Landon Fuller
Landon Fuller
Landon Fuller
@landonfuller

Landon Fuller

@landonfuller

CEO and software developer at http://www.plausible.coop , your friendly neighborhood employee-owned software co-operative. Moonlighting FreeBSD kernel developer.

Joined December 2008
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    1. Michael Tsai ‏@mjtsai Feb 28

      Apple Blacklists Own Ethernet Driver: http://mjtsai.com/blog/2016/02/28/apple-blacklists-own-ethernet-driver/ … #mjtsaiblog

      0 replies 5 retweets 1 like
    2. Landon Fuller ‏@landonfuller Feb 28

      @mjtsai Presumably intended for >= 10.11.4, where Yukon2/BCM driver updates appear to fix local vulnerabilities in IOUserClient interface.

      0 replies 1 retweet 0 likes
    3. Landon Fuller ‏@landonfuller Feb 28

      @mjtsai Dockmod seems have shipped a valid signed kext that allowed root to bypass SIP and inject code into processes (like the Dock).

      0 replies 0 retweets 0 likes
    4. Landon Fuller ‏@landonfuller Feb 28

      @mjtsai That seems to have resulted in getting their signing cert revoked, and a blacklist entry added for their existing kext.

      0 replies 0 retweets 0 likes
    5. Gwynne Raskind ‏@ameaijou Feb 28

      @landonfuller @mjtsai Good call IMO. Injecting userland code into Apple-owned processes from kernelspace is a rather horrid security fail.

      0 replies 0 retweets 0 likes
    6. Landon Fuller ‏@landonfuller Feb 28

      @ameaijou @mjtsai I agree; I've got no love SIP, but from what I saw in IDA, that was was __way__ too hoary to be sitting in the kernel.

      0 replies 0 retweets 0 likes
    7. Landon Fuller ‏@landonfuller Feb 28

      @ameaijou @mjtsai er, that implementation was too hoary, and warranted blacklisting. Uncomfortable with the total cert revoke, though.

      0 replies 0 retweets 0 likes
    8. Gwynne Raskind ‏@ameaijou Feb 28

      @landonfuller @mjtsai Slightly disagree. IMO bad code in kernelspace should be strongly discouraged regardless of issues with SIP etc.

      0 replies 0 retweets 0 likes
      Landon Fuller ‏@landonfuller Feb 28

      @ameaijou @mjtsai I'm just wary of locking people out of the kernel forever because of bad (not malicious) code.

      • Like 1
      • Michael Tsai
      4:57 PM - 28 Feb 2016
      0 replies 0 retweets 1 like
        1. Michael Tsai ‏@mjtsai Feb 28

          @landonfuller @ameaijou Was it because of the code or because they were not honest when applying for the cert?

          0 replies 0 retweets 0 likes
        2. Show more
      2. Gwynne Raskind ‏@ameaijou Feb 28

        @landonfuller @mjtsai Agreed, but responsible use of something as powerful as kext loading is important 😕 I’m not sure how I feel overall.

        0 replies 0 retweets 2 likes

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