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Add a note about browsers #1634

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Add a note about browsers
May 15, 2020
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12 changes: 12 additions & 0 deletions content/docs/operating/security.md
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Expand Up @@ -202,6 +202,18 @@ environment variable as used by EC2 service discovery) may end up exposed due to
code outside of our control or due to functionality that happens to expose
wherever it is stored.

## Browser local storage

Prometheus and Alertmanager web interfaces store data in the local storage of
the web browser. The history of the queries made using the Prometheus web UI,
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@juliusv juliusv May 15, 2020

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the web browser. The history of the queries made using the Prometheus web UI,
the web browser. The history of the queries made using the Prometheus web UI

and the creator of a silence in Alertmanager are save locally, amongst other
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@juliusv juliusv May 15, 2020

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and the creator of a silence in Alertmanager are save locally, amongst other
and the creator of a silence in Alertmanager are saved locally, amongst other

data.

We expect that no secrets are entered into those fields and that browser
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@brian-brazil brian-brazil May 15, 2020

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Isn't this already implied by the above section on secrets?

sessions are not shared between users. If the same browser is accessed by
multiple users, they might have access to other users' local query history in
Prometheus or name in Alertmanager.

## Denial of Service

There are some mitigations in place for excess load or expensive queries.
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