[tor-bugs] #22794 [Applications/Tor Browser]: Don't open AF_INET/AF_INET6 sockets when AF_LOCAL is configured.

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#22794: Don't open AF_INET/AF_INET6 sockets when AF_LOCAL is configured.
-------------------------------------------------+-------------------------
 Reporter:  yawning                              |          Owner:
                                                 |  pospeselr
     Type:  defect                               |         Status:
                                                 |  needs_review
 Priority:  Medium                               |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-security, tbb-sandboxing,        |  Actual Points:
  TorBrowserTeam201802R                          |
Parent ID:  #20775                               |         Points:
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by teor):

 macOS legacy sandbox support has:
 {{{
      #include <sandbox.h>
 ...
      kSBXProfileNoInternet              TCP/IP networking is prohibited.
                                         DEPRECATED.

      kSBXProfileNoNetwork               All sockets-based networking is
 pro-
                                         hibited.  DEPRECATED.
 }}}

 sandbox-exec is also legacy, but it works from the command line:
 https://paolozaino.wordpress.com/2015/10/20/maximum-security-and-privacy-
 using-mac-os-sandbox-and-tor-browser-bundle/

 Unfortunately, the replacement API doesn't seem to distinguish between
 TCP/IP and unix sockets. We'd need to do some testing.
 {{{
 com.apple.security.network.client

 Network socket for connecting to other machines

 com.apple.security.network.server

 Network socket for listening for incoming connections initiated by other
 machines
 }}}
 https://developer.apple.com/library/content/documentation/Miscellaneous/Reference/EntitlementKeyReference/Chapters/EnablingAppSandbox.html#//apple_ref/doc/uid/TP40011195-CH4-SW9

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22794#comment:21>
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