From owner-freebsd-security@freebsd.org  Tue Jan 23 22:18:31 2018
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From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no>
To: Roger Marquis <marquis@roble.com>
Cc: freebsd-security@freebsd.org
Subject: Re: Malicious URL ? https://[::]/
References: <nycvar.OFS.7.76.1801220930100.41328@mx.roble.com>
 <86wp08fcil.fsf@desk.des.no>
Date: Tue, 23 Jan 2018 23:18:29 +0100
In-Reply-To: <86wp08fcil.fsf@desk.des.no> ("Dag-Erling =?utf-8?Q?Sm=C3=B8r?=
 =?utf-8?Q?grav=22's?= message of
 "Tue, 23 Jan 2018 23:14:58 +0100")
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Dag-Erling Sm=C3=B8rgrav <des@des.no> writes:
> Basically the IPv6 equivalent of https://127.0.0.1/.  =E2=80=9C[::]=E2=80=
=9D is the
> bracketed literal representation of the IPv6 localhost address.

Hang on a sec =E2=80=94 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.

DES
--=20
Dag-Erling Sm=C3=B8rgrav - des@des.no