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[Launchpad Bug Tracker <1771988@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package python-urllib3 -
1.13.1-2ubuntu0.16.04.2

---------------
python-urllib3 (1.13.1-2ubuntu0.16.04.2) xenial; urgency=medium

  * d/p/07_support_ip_sans.patch: Cherry pick fix to support use of
    IP based SAN's in TLS certificates (LP: #1771988).

 -- James Page <james.page@xxxxxxxxxx>  Mon, 20 Aug 2018 15:54:33 +0100

** Changed in: python-urllib3 (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1771988

Title:
  certificate validation with IP address based SAN's fails

Status in Ubuntu Cloud Archive:
  Fix Released
Status in Ubuntu Cloud Archive mitaka series:
  In Progress
Status in python-urllib3 package in Ubuntu:
  Fix Released
Status in python-urllib3 source package in Xenial:
  Fix Released

Bug description:
  [Impact]
  Users of urllib3 are unable to securely access websites who's certificates use IP based subject alternative names;  this includes openstack client tooling which uses urllib3 via requests.

  [Test Case]
  Deploy and configure a server with TLS and an IP based SAN cert with a locally trusted CA.

  import urllib3

  http = urllib3.PoolManager()
  r = http.request('GET', 'https://192.168.1.2')

  will fail

  [Regression Potential]
  Cherry picked fix comes from a later urllib3 release which has tested fine for IP SAN usage in later OpenStack release deployments.

  [Original Bug Report]
  urllib3 fails to validate certificates with IP address based SAN's.

  Fixed upstream:
  https://github.com/urllib3/urllib3/commit/c74bd70c3a97e30f0560bee9b7fa1bfc767ebf0b

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