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[tor-bugs] #31889 [Circumvention/Snowflake]: Rebuild and redeploy broker and bridge using Go 1.12.10+ / 1.13.1+

#31889: Rebuild and redeploy broker and bridge using Go 1.12.10+ / 1.13.1+
-----------------------------------------+--------------------
     Reporter:  dcf                      |      Owner:  (none)
         Type:  defect                   |     Status:  new
     Priority:  Medium                   |  Milestone:
    Component:  Circumvention/Snowflake  |    Version:
     Severity:  Normal                   |   Keywords:
Actual Points:                           |  Parent ID:
       Points:                           |   Reviewer:
      Sponsor:                           |
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 https://groups.google.com/d/msg/golang-announce/cszieYyuL9Q/g4Z7pKaqAgAJ
 > We have just released Go 1.13.1 and Go 1.12.10 to address a recently
 reported security issue. We recommend that all affected users update to
 one of these releases (if you’re not sure which, choose Go 1.13.1).
 >
 > net/http (through net/textproto) used to accept and normalize invalid
 HTTP/1.1 headers with a space before the colon, in violation of RFC 7230.
 If a Go server is used behind an uncommon reverse proxy that accepts and
 forwards but doesn't normalize such invalid headers, the reverse proxy and
 the server can interpret the headers differently. This can lead to filter
 bypasses or [https://portswigger.net/blog/http-desync-attacks-request-
 smuggling-reborn request smuggling], the latter if requests from separate
 clients are multiplexed onto the same upstream connection by the proxy.
 Such invalid headers are now rejected by Go servers, and passed without
 normalization to Go client applications.
 >
 > The issue is CVE-2019-16276 and Go issue https://golang.org/issue/34540.

 It doesn't look like this is urgent for us, given the details of our
 deployment.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31889>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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