[tor-bugs] #31890 [Circumvention/meek]: Redeploy meek-server instances using Go 1.12.10+ / 1.13.1+

Tor Bug Tracker & Wiki blackhole at torproject.org
Thu Oct 10 21:36:19 UTC 2019


#31890: Redeploy meek-server instances using Go 1.12.10+ / 1.13.1+
--------------------------------+--------------------------
 Reporter:  dcf                 |          Owner:  inf0
     Type:  task                |         Status:  assigned
 Priority:  High                |      Milestone:
Component:  Circumvention/meek  |        Version:
 Severity:  Normal              |     Resolution:
 Keywords:                      |  Actual Points:
Parent ID:                      |         Points:
 Reviewer:                      |        Sponsor:
--------------------------------+--------------------------
Changes (by dcf):

 * owner:  dcf => inf0


Old description:

> 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.
>
> We need to redeploy the following servers:
>  * cymrubridge02 (backend for meek-azure, run by inf0)
>  * ~~BridgeDB Moat (run by phw)~~
>  * starman (throttled meek.bamsoftware.com, run by dcf)
>  * maenad (unthrottled meek.bamsoftware.com, run by dcf)
>  * GAEuploader (gaeuploader.meek.bamsoftware.com, run by dcf)
>
> The Moat configuration uses a reverse proxy, so this is perhaps relevant
> to us.

New description:

 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.

 We need to redeploy the following servers:
  * cymrubridge02 (backend for meek-azure, run by inf0)
  * ~~BridgeDB Moat (run by phw)~~
  * ~~starman (throttled meek.bamsoftware.com, run by dcf)~~
  * ~~maenad (unthrottled meek.bamsoftware.com, run by dcf)~~
  * ~~GAEuploader (gaeuploader.meek.bamsoftware.com, run by dcf)~~

 The Moat configuration uses a reverse proxy, so this is perhaps relevant
 to us.

--

Comment:

 I redeployed my meek-server instances using go1.12.10 at about 2019-10-10
 21:30:00.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31890#comment:4>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online


More information about the tor-bugs mailing list