[tbb-bugs] #25036 [Applications/Tor Browser]: Tor Browser 7.5 rejects connections to raw ipv6 addresses

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#25036: Tor Browser 7.5 rejects connections to raw ipv6 addresses
--------------------------------------+--------------------------
 Reporter:  pastly                    |          Owner:  tbb-team
     Type:  defect                    |         Status:  new
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:                            |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
--------------------------------------+--------------------------
Description changed by pastly:

Old description:

> OS X 10.11.6, Tor Browser 7.5
>
> I have to configure TB to use a socks5 proxy to reach the internet (I
> predict this is unrelated). I disabled safe logging.
>
> Attempting to go to https://[2a00:1450:401b:800::200e]/ produces the
> following Tor logs.
>
> {{{
> 1/26/18, 14:51:25.600 [NOTICE] Bootstrapped 85%: Finishing handshake with
> first hop
> 1/26/18, 14:51:48.700 [NOTICE] Bootstrapped 90%: Establishing a Tor
> circuit
> 1/26/18, 14:51:50.000 [NOTICE] Tor has successfully opened a circuit.
> Looks like client functionality is working.
> 1/26/18, 14:51:50.000 [NOTICE] Bootstrapped 100%: Done
> 1/26/18, 14:51:50.900 [NOTICE] New control connection opened from
> 127.0.0.1.
> 1/26/18, 14:51:51.000 [NOTICE] New control connection opened from
> 127.0.0.1.
> 1/26/18, 14:54:06.900 [WARN] Your application (using socks5 to port 443)
> gave Tor a malformed hostname: "2a00:1450:401b:800::200e". Rejecting the
> connection.
> 1/26/18, 14:54:06.900 [WARN] Your application (using socks5 to port 443)
> gave Tor a malformed hostname: "2a00:1450:401b:800::200e". Rejecting the
> connection.
> 1/26/18, 14:55:38.200 [WARN] Your application (using socks5 to port 443)
> gave Tor a malformed hostname: "2a00:1450:401b:800::200e". Rejecting the
> connection.
> 1/26/18, 14:55:38.200 [WARN] Your application (using socks5 to port 443)
> gave Tor a malformed hostname: "2a00:1450:401b:800::200e". Rejecting the
> connection.
> }}}
>
> https://ipv6.google.com works with every 6th circuit. I'm sure this is
> unrelated and has to do with exits half supporing ipv6 or something.

New description:

 OS X 10.11.6, Tor Browser 7.5

 I have to configure TB to use a socks5 proxy to reach the internet (I
 predict this is unrelated). I disabled safe logging.

 Attempting to go to https://[2a00:1450:401b:800::200e]/ (google) produces
 the following Tor logs.

 {{{
 1/26/18, 14:51:25.600 [NOTICE] Bootstrapped 85%: Finishing handshake with
 first hop
 1/26/18, 14:51:48.700 [NOTICE] Bootstrapped 90%: Establishing a Tor
 circuit
 1/26/18, 14:51:50.000 [NOTICE] Tor has successfully opened a circuit.
 Looks like client functionality is working.
 1/26/18, 14:51:50.000 [NOTICE] Bootstrapped 100%: Done
 1/26/18, 14:51:50.900 [NOTICE] New control connection opened from
 127.0.0.1.
 1/26/18, 14:51:51.000 [NOTICE] New control connection opened from
 127.0.0.1.
 1/26/18, 14:54:06.900 [WARN] Your application (using socks5 to port 443)
 gave Tor a malformed hostname: "2a00:1450:401b:800::200e". Rejecting the
 connection.
 1/26/18, 14:54:06.900 [WARN] Your application (using socks5 to port 443)
 gave Tor a malformed hostname: "2a00:1450:401b:800::200e". Rejecting the
 connection.
 1/26/18, 14:55:38.200 [WARN] Your application (using socks5 to port 443)
 gave Tor a malformed hostname: "2a00:1450:401b:800::200e". Rejecting the
 connection.
 1/26/18, 14:55:38.200 [WARN] Your application (using socks5 to port 443)
 gave Tor a malformed hostname: "2a00:1450:401b:800::200e". Rejecting the
 connection.
 }}}

 https://ipv6.google.com works with every 6th circuit. I'm sure this is
 unrelated and has to do with exits half supporing ipv6 or something.

--

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25036#comment:1>
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