[tor-bugs] #31115 [Core Tor/Tor]: tor returns first 4 bytes of IPv6 address only when using SOCKS command "F0"

Tue Jul 9 11:38:50 UTC 2019

#31115: tor returns first 4 bytes of IPv6 address only when using SOCKS command
"F0"
--------------------------+------------------------------
 Reporter:  cypherpunks   |          Owner:  (none)
     Type:  defect        |         Status:  new
 Priority:  Medium        |      Milestone:
Component:  Core Tor/Tor  |        Version:  Tor: 0.3.5.8
 Severity:  Normal        |     Resolution:
 Keywords:                |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:
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Comment (by cypherpunks):

 example:

 SOCKS response for resolving "ipv6.google.com"
 ("2a00:1450:4007:80c::200e")

 {{{
 0x05 00 00 04 2a001450 4001
 }}}

 05 = version
 00 = resp code: succeeded
 00 = reserved
 04 = ATYP: IPv6
 2a001450

 last to bytes are "BND.PORT" as per spec but they might also be part of
 the IPv6 address
 so the answer might contain the first 6 bytes not just 4 bytes.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31115#comment:1>
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