open-vault/website/content/partials/entity-alias-mapping.mdx
Pratyoy Mukhopadhyay c97c8687f4
[VAULT-3252] Add entity-alias behavior change to docs (#13370)
* Add entity-alias behavior change to docs

* Add upgrade note about entity-alias mapping change

* Rename 1.7-9 upgrade pages, shuffle upgrade note position

* Update website/content/partials/entity-alias-mapping.mdx

Co-authored-by: Meggie <meggie@hashicorp.com>

* Add incorrect policy issue to the docs

* Add example about entity-alias restriction

Co-authored-by: Meggie <meggie@hashicorp.com>
2021-12-08 13:52:51 -08:00

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## Entity Alias mapping
Previously, an entity in Vault could be mapped to multiple entity aliases on the same authentication backend. This
led to a potential security vulnerability (CVE-2021-43998), as ACL policies templated with alias information would match the first
alias created. Thus, tokens created from all aliases of the entity, will have access to the paths containing alias
metadata of the first alias due to templated policies being incorrectly applied. As a result, the mapping behavior was updated
such that an entity can only have one alias per authentication backend. This change exists in Vault 1.9.0+, 1.8.5+ and 1.7.6+.