[Bug 210539] lang/python33: HTTP Header Injection in Python urllib (CVE-2016-5699)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=210539

            Bug ID: 210539
           Summary: lang/python33: HTTP Header Injection in Python urllib
                    (CVE-2016-5699)
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
               URL: http://blog.blindspotsecurity.com/2016/06/advisory-htt
                    p-header-injection-in.html
                OS: Any
            Status: New
          Keywords: needs-patch, security
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: python at FreeBSD.org
          Reporter: vlad-fbsd at acheronmedia.com
                CC: junovitch at freebsd.org, ports-secteam at FreeBSD.org
             Flags: maintainer-feedback?(python at FreeBSD.org)
          Assignee: python at FreeBSD.org

Python 3.3 is vulnerable to HTTP Header injection in urllib.

* Nice summary of the problem with POC:
 
http://blog.blindspotsecurity.com/2016/06/advisory-http-header-injection-in.html

* CVE request:
  http://www.openwall.com/lists/oss-security/2016/06/14/7
  (assignment) http://www.openwall.com/lists/oss-security/2016/06/16/2

* Upstream issue:
  https://bugs.python.org/issue22928

* Upstream fix in Python 3.5, 3.4, 2.7 (but not 3.3):
  (3.5, 3.4) https://hg.python.org/cpython/rev/bf3e1c9b80e9
  (2.7) https://hg.python.org/cpython/rev/1c45047c5102

I've tested the POC given in the first link above, and indeed injection happens
with 3.3, but not with 3.4 (haven't tested the others). I'll see if I can
backport the patch myself, will attach it here. Also waiting for upstream to
respond about my backport request.

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