On Sat, Aug 24, 2013 at 07:18:20AM -0000, cheater wrote:
> bear in mind ssh has the same policy about ignoring "insecure" files.

Incorrect. ssh has a policy of disallowing insecure files on the *server*
side: insecure permissions on the .ssh directory of the target user mean the
server cannot trust the integrity of those files.  But that does not prevent
ssh from using a world-readable identity file on the *client* side, which is
the security equivalent of what we're talking about here.

The reason for this is that sometimes the client really *does* want the
private key to be shared, and ssh shouldn't get in the way of that; and once
the file has been made public any other user can copy it to a mode 0600
file of their own and use it there: the cat's already out of the bag, so
there's no point in trying to enforce "security" on the client.

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https://bugs.launchpad.net/bugs/321442

Title:
  NM ignores "system"-level connections if files are world-readable

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