yahoo-eng-team team mailing list archive

[Abu Shohel Ahmed <1299039@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

In Havana Stable release for both V2.0 an V3,

A scoped token can be used to get another scoped or un-scopped token.
This can be exploited by anyone who has gained access to  a scoped
token.

For example,

1. userA is related to two projects: Project1, Project2
2. userA creates  tokenA scoped by Project1
3.  userA  shares the tokenA to a third party (malicious).  
4. Third party can now make a token creation call to create a new tokenB scoped under projectB using tokenA.

Although, we know that bearer token has all or nothing property, scoping the token can limit the exposure. 
A scoped token should not be allowed to create another scoped token.

** Affects: keystone
     Importance: Undecided
         Status: New


** Tags: security

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https://bugs.launchpad.net/bugs/1299039

Title:
  Token Scoping

Status in OpenStack Identity (Keystone):
  New

Bug description:
  In Havana Stable release for both V2.0 an V3,

  A scoped token can be used to get another scoped or un-scopped token.
  This can be exploited by anyone who has gained access to  a scoped
  token.

  For example,

  1. userA is related to two projects: Project1, Project2
  2. userA creates  tokenA scoped by Project1
  3.  userA  shares the tokenA to a third party (malicious).  
  4. Third party can now make a token creation call to create a new tokenB scoped under projectB using tokenA.

  Although, we know that bearer token has all or nothing property, scoping the token can limit the exposure. 
  A scoped token should not be allowed to create another scoped token.

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