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[OpenStack Infra <1300274@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/84735
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=ce6cedb30c5c4b4cf4db9380f09443de22414b39
Submitter: Jenkins
Branch:    milestone-proposed

commit ce6cedb30c5c4b4cf4db9380f09443de22414b39
Author: Florent Flament <florent.flament-ext@xxxxxxxxxxxxx>
Date:   Tue Apr 1 12:48:22 2014 +0000

    Sanitizes authentication methods received in requests.
    
    When a user authenticates against Identity V3 API, he can specify
    multiple authentication methods. This patch removes duplicates, which
    could have been used to achieve DoS attacks.
    
    Change-Id: Iec9a1875a4ff6e2fac0fb2c3db6f3ce34a5dfd1d
    Closes-Bug: 1300274


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

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https://bugs.launchpad.net/bugs/1300274

Title:
  V3 Authentication Chaining - uniqueness of auth method names

Status in OpenStack Identity (Keystone):
  Fix Released
Status in OpenStack Security Advisories:
  Incomplete

Bug description:
  In V3.0 API,  we can chain authentication methods. An attacker can
  place the same authentication method multiple times in the methods
  filed. This will result in the same authentication method checking
  over and over (for loop in code).  Using this, an attacker can achieve
  some sorts of Denial of Service.   The methods field is not properly
  sanitized.

  {
     "auth":{
        "identity":{
           "methods":[
              "password",
              "password",
               "password",
               "password",
               "password" 
           ],
          "password":{
              "user":{
                 "domain":{
                    "id":"default"
                 },
                 "name":"demo",
                 "password":"stack"
              }
           }
        }
     }
  }

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