docs: update security warnings around server.cors and server.allowedHosts#19378
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Co-authored-by: "Dominik G." <dominik.goepel@gmx.de>
sapphi-red
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Feb 7, 2025
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| We recommend setting a specific value rather than `true` to avoid exposing the source code to untrusted origins. | ||
| Setting this to `true` grants any websites to send requests to your dev server, allowing them to download your source code and content. We recommend always using an explicit list of allowed origins. | ||
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@dominikg I updated the warning here based on your suggestion 👍
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| Setting this to `true` virtually grants any websites to send requests to your dev server by DNS rebinding attacks, allowing them to download your source code and content. We recommend always using an explicit list of allowed hosts. See [GHSA-vg6x-rcgg-rjx6](https://github.com/vitejs/vite/security/advisories/GHSA-vg6x-rcgg-rjx6) for more details. | ||
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Added a similar warning to server.cors for server.allowedHosts as well. Technically, it is safe to set server.allowedHosts: true if the dev server runs behind a reverse proxy (the reverse proxy needs to check the host in that case though). But I didn't mention it here as I guess that usage isn't common and setting allowedHosts doesn't hurt.
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| ::: details What hosts are safe to be added? | ||
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| Hosts that you have control over which IP addresses they resolve to are safe to add to the list of allowed hosts. | ||
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| For example, if you own a domain `vite.dev`, you can add `vite.dev` and `.vite.dev` to the list. If you don't own that domain and you cannot trust the owner of that domain, you should not add it. | ||
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| Especially, you should never add Top-Level Domains like `.com` to the list. This is because anyone can purchase a domain like `example.com` and control the IP address it resolves to. | ||
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While CORS is a general thing, this allowedHosts is not that general and the users weren't sure what value are safe to be set. I added a explanation here.
patak-cat
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Feb 7, 2025
patak-cat
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Feb 7, 2025
Co-authored-by: patak <583075+patak-dev@users.noreply.github.com>
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…edHosts` (vitejs#19378) Co-authored-by: "Dominik G." <dominik.goepel@gmx.de> Co-authored-by: patak <583075+patak-dev@users.noreply.github.com>
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Description
refs #19345
refs ddev/ddev.com#313 (review)
refs #19287
refs storybookjs/storybook#30432