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[Bug 1490804] Re: [OSSA 2016-005] PKI Token Revocation Bypass (CVE-2015-7546)

 

** Changed in: keystone/kilo
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1490804

Title:
  [OSSA 2016-005] PKI Token Revocation Bypass (CVE-2015-7546)

Status in django-openstack-auth:
  Invalid
Status in OpenStack Identity (keystone):
  Fix Released
Status in OpenStack Identity (keystone) kilo series:
  Fix Released
Status in keystonemiddleware:
  Fix Released
Status in OpenStack Security Advisory:
  Fix Released
Status in OpenStack Security Notes:
  Fix Released
Status in python-keystoneclient:
  Won't Fix

Bug description:
  A keystone token which has been revoked can still be used by manipulating particular byte fields within the token.
  When a Keystone token is revoked it is added to the revoked list which stores the exact token value. Any API will look at the token to see whether or not it should accept a token. By changing a single byte within the token, the revocation can be bypassed.  see the testing script [1].

  It is suggested that the revocation should be changed to only check
  the token's inner ID.

  [1] http://paste.openstack.org/show/436516/

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