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Date: Wed, 24 Jan 2018 12:02:47 -0800 (PST)
From: Roger Marquis <marquis@roble.com>
To: =?ISO-8859-15?Q?Dag-Erling_Sm=F8rgrav?= <des@des.no>
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Subject: Re: Malicious URL ? https://[::]/
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Dag-Erling Sm?rgrav wrote:
> Hang on a sec ? localhost should be [::1], not [::], which is the
> equivalent of 0.0.0.0.  My guess is a software bug.  Jails look a little
> weird from the inside unless you use a fully virtualized network stack.
> The proxy probably doesn't have sufficient error checking around
> getpeername() or something like that.

Another intermediate URL-checker reports that the plugin in question
(CanvasBlocker) is requesting https://[::]/ directly.  If a bug this is
the first I've seen of it's kind.  If not the question is what threat
profile [::]:443 might expose.  (Other than the obvious jail vector
which really should be fixed.  FreeBSD Foundation where are you?)

Karl's reference to RFC 4291 indicates it is a protocol violation as
well.

The symptom has been reported to Mozilla.

Roger