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Remove enforcement from embed and object elements #486

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Apr 4, 2024
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Remove enforcement from embed and object elements #486

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33 changes: 0 additions & 33 deletions spec/index.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -1093,10 +1093,7 @@ To <dfn abstract-op export>get Trusted Types-compliant attribute value</dfn> on
<tr><th>Element<th>Attribute namespace<th>Attribute local name<th>TrustedType<th>Sink
<tbody>
<tr><td>{{HTMLIFrameElement}}<td>null<td>"srcdoc"<td>{{TrustedHTML}}<td>"HTMLIFrameElement srcdoc"
<tr><td>{{HTMLEmbedElement}}<td>null<td>"src"<td>{{TrustedScriptURL}}<td>"HTMLEmbedElement src"
<tr><td>{{HTMLScriptElement}}<td>null<td>"src"<td>{{TrustedScriptURL}}<td>"HTMLScriptElement src"
<tr><td>{{HTMLObjectElement}}<td>null<td>"data"<td>{{TrustedScriptURL}}<td>"HTMLObjectElement data"
<tr><td>{{HTMLObjectElement}}<td>null<td>"codebase"<td>{{TrustedScriptURL}}<td>"HTMLObjectElement codebase"
<tr><td>{{SVGScriptElement}}<td>null<td>"href"<td>{{TrustedScriptURL}}<td>"SVGScriptElement href"
<tr><td>{{SVGScriptElement}}<td><a>XLink namespace</a><td>"href"<td>{{TrustedScriptURL}}<td>"SVGScriptElement href"
</tbody>
Expand Down Expand Up @@ -1205,21 +1202,6 @@ The first few steps of the [=prepare the script element=] algorithm are modified
<li>...
</ol>

### Enforcement in element attributes ### {#enforcement-in-sinks}

This document modifies following IDL attributes of various DOM elements:

<pre class="idl exclude">
partial interface HTMLEmbedElement {
[CEReactions] attribute ScriptURLString src;
};

partial interface HTMLObjectElement {
[CEReactions] attribute ScriptURLString data;
[CEReactions] attribute ScriptURLString codeBase; // obsolete
};
</pre>

### Enforcement in timer functions ### {#enforcement-in-timer-functions}

This document modifies the {{WindowOrWorkerGlobalScope}} interface mixin:
Expand Down Expand Up @@ -1668,21 +1650,6 @@ restrictions:

* <a href="https://w3c.github.io/webcomponents/spec/imports/">HTML imports</a>

## Plugin navigation ## {#plugins}

Plugin content may have access to the document that embeds it (or; more broadly,
to the origin it was served from), often giving it the same capabilities
as DOM XSS. That's why Trusted Types limit {{HTMLEmbedElement}}'s <{embed/src}> to
{{TrustedScriptURL}}.

However, it is also possible to navigate an existing object / embed to an
arbitrary location, bypassing the {{TrustedScriptURL}} restriction.

Since plugin content in the web in general is being phased out for other
security reasons, and their navigation model is in flux, we recommend authors
to prevent that bypass vector by limiting the plugins altogether with
[=object-src=]. For example: `Content-Security-Policy: object-src: none`.

## Script gadgets ## {#script-gadgets}

While Trusted Types logic is called on many operations that results in creating
Expand Down
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