[tor-bugs] #17562 [Tor]: DataDirectory permissions are too restrictive when using CapabilityBoundingSet or SELinux

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#17562: DataDirectory permissions are too restrictive when using
CapabilityBoundingSet or SELinux
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 Reporter:  jamielinux  |          Owner:
     Type:  defect      |         Status:  needs_review
 Priority:  Medium      |      Milestone:  Tor: 0.2.8.x-final
Component:  Tor         |        Version:  Tor: unspecified
 Severity:  Normal      |     Resolution:
 Keywords:  tor-core    |  Actual Points:
Parent ID:              |         Points:
  Sponsor:              |
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Comment (by jamielinux):

 I've also realised that CAP_CHOWN and CAP_FOWNER are required (or the
 equivalent SELinux capabilities chown and fowner) if creating a
 ControlSocket.

 The parent directory for the socket (eg, /var/run/tor) must only be
 writable by the default GID. However, Tor tries to create the Unix socket
 before dropping root permissions and so the root user is trying to
 chown/chmod files that it doesn't have access to.

 What do you think about this third patch to fix this issue? It seems to
 work, but I'll admit I don't know what the repercussions may be or whether
 I've broken something else.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/17562#comment:10>
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