- From: poot <cvsmail@w3.org>
- Date: Fri, 17 Jun 2011 05:52:43 -0400
- To: public-html-diffs@w3.org
hixie: Introduce <object type='' data='' typemustmatch> to help when
referencing resources from a remote host. (whatwg r6222)
http://dev.w3.org/cvsweb/html5/spec/Overview.html?r1=1.4986&r2=1.4987&f=h
http://html5.org/tools/web-apps-tracker?from=6221&to=6222
===================================================================
RCS file: /sources/public/html5/spec/Overview.html,v
retrieving revision 1.4986
retrieving revision 1.4987
diff -u -d -r1.4986 -r1.4987
--- Overview.html 14 Jun 2011 00:33:11 -0000 1.4986
+++ Overview.html 14 Jun 2011 02:08:09 -0000 1.4987
@@ -20792,12 +20792,12 @@
</div><div class="example">
<p>Here's a way to embed a resource that requires a proprietary
- plug-in, like Flash:</p>
+ plugin, like Flash:</p>
<pre><embed src="catgame.swf"></pre>
- <p>If the user does not have the plug-in (for example if the
- plug-in vendor doesn't support the user's platform), then the user
+ <p>If the user does not have the plugin (for example if the
+ plugin vendor doesn't support the user's platform), then the user
will be unable to use the resource.</p>
<p>To pass the plugin a parameter "quality" with the value "high",
@@ -20826,6 +20826,7 @@
<dd><a href="#global-attributes">Global attributes</a></dd>
<dd><code title="attr-object-data"><a href="#attr-object-data">data</a></code></dd>
<dd><code title="attr-object-type"><a href="#attr-object-type">type</a></code></dd>
+ <dd><code title="attr-object-typemustmatch"><a href="#attr-object-typemustmatch">typemustmatch</a></code></dd>
<dd><code title="attr-object-name"><a href="#attr-object-name">name</a></code></dd>
<dd><code title="attr-hyperlink-usemap"><a href="#attr-hyperlink-usemap">usemap</a></code></dd>
<dd><code title="attr-fae-form"><a href="#attr-fae-form">form</a></code></dd>
@@ -20836,6 +20837,7 @@
<pre class="idl">interface <dfn id="htmlobjectelement">HTMLObjectElement</dfn> : <a href="#htmlelement">HTMLElement</a> {
attribute DOMString <a href="#dom-object-data" title="dom-object-data">data</a>;
attribute DOMString <a href="#dom-object-type" title="dom-object-type">type</a>;
+ attribute boolean <a href="#dom-object-typemustmatch" title="dom-object-typeMustMatch">typeMustMatch</a>;
attribute DOMString <a href="#dom-object-name" title="dom-object-name">name</a>;
attribute DOMString <a href="#dom-object-usemap" title="dom-object-useMap">useMap</a>;
readonly attribute <a href="#htmlformelement">HTMLFormElement</a>? <a href="#dom-fae-form" title="dom-fae-form">form</a>;
@@ -20863,9 +20865,20 @@
<a href="#plugin">plugin</a>.<p>The <dfn id="attr-object-data" title="attr-object-data"><code>data</code></dfn>
attribute, if present, specifies the address of the resource. If
present, the attribute must be a <a href="#valid-non-empty-url-potentially-surrounded-by-spaces">valid non-empty
- URL potentially surrounded by spaces</a>.<p>The <dfn id="attr-object-type" title="attr-object-type"><code>type</code></dfn>
+ URL potentially surrounded by spaces</a>.<p class="warning">Authors who reference resources from other <a href="#origin" title="origin">origins</a> that they do not trust are urged to
+ use the <code title="attr-object-typemustmatch"><a href="#attr-object-typemustmatch">typemustmatch</a></code>
+ attribute defined below. Without that attribute, it is possible in
+ certain cases for an attacker on the remote host to use the plugin
+ mechanism to run arbitrary scripts, even if the author has used
+ features such as the Flash "allowScriptAccess" parameter.</p><p>The <dfn id="attr-object-type" title="attr-object-type"><code>type</code></dfn>
attribute, if present, specifies the type of the resource. If
- present, the attribute must be a <a href="#valid-mime-type">valid MIME type</a>.<p>At least one of either the <code title="attr-object-data"><a href="#attr-object-data">data</a></code> attribute or the <code title="attr-object-type"><a href="#attr-object-type">type</a></code> attribute must be present.<p>The <dfn id="attr-object-name" title="attr-object-name"><code>name</code></dfn>
+ present, the attribute must be a <a href="#valid-mime-type">valid MIME type</a>.<p>At least one of either the <code title="attr-object-data"><a href="#attr-object-data">data</a></code> attribute or the <code title="attr-object-type"><a href="#attr-object-type">type</a></code> attribute must be present.<p>The <dfn id="attr-object-typemustmatch" title="attr-object-typemustmatch"><code>typemustmatch</code></dfn>
+ attribute is a <a href="#boolean-attribute">boolean attribute</a> whose precense
+ indicates that the resource specified by the <code title="attr-object-data"><a href="#attr-object-data">data</a></code> attribute is only to be used if
+ the value of the <code title="attr-object-type"><a href="#attr-object-type">type</a></code>
+ attribute and the <a href="#content-type">Content-Type</a> of the aforementioned
+ resource match.<p>The <code title="attr-object-typemustmatch"><a href="#attr-object-typemustmatch">typemustmatch</a></code>
+ attribute must not be specified unless both the <code title="attr-object-data"><a href="#attr-object-data">data</a></code> attribute and the <code title="attr-object-type"><a href="#attr-object-type">type</a></code> attribute are present.<p>The <dfn id="attr-object-name" title="attr-object-name"><code>name</code></dfn>
attribute, if present, must be a <a href="#valid-browsing-context-name">valid browsing context
name</a>. The given value is used to name the <a href="#nested-browsing-context">nested
browsing context</a>, if applicable.<div class="impl">
@@ -20999,6 +21012,28 @@
<li>
+ <p>If the <code><a href="#the-object-element">object</a></code> element has a <code title="attr-object-type"><a href="#attr-object-type">type</a></code> attribute and a <code title="attr-object-typemustmatch"><a href="#attr-object-typemustmatch">typemustmatch</a></code>
+ attribute, and the resource has <a href="#content-type" title="Content-Type">associated Content-Type metadata</a>,
+ and the type specified in <a href="#content-type" title="Content-Type">the
+ resource's Content-Type metadata</a> is an <a href="#ascii-case-insensitive">ASCII
+ case-insensitive</a> match for the value of the element's
+ <code title="attr-object-type"><a href="#attr-object-type">type</a></code> attribute, then let
+ <var title="">resource type</var> be that type and jump to the
+ step below labeled <i>handler</i>.</p>
+
+
+
+ </li>
+
+ <li>
+
+ <p>If the <code><a href="#the-object-element">object</a></code> element has a <code title="attr-object-typemustmatch"><a href="#attr-object-typemustmatch">typemustmatch</a></code>
+ attribute, jump to the step below labeled <i>handler</i>.</p>
+
+ </li>
+
+ <li>
+
<p>If the user agent is configured to strictly obey
@@ -21009,6 +21044,12 @@
metadata</a>, and jump to the step below labeled
<i>handler</i>.</p>
+ <p class="warning">This can introduce a vulnerability, wherein
+ a site is trying to embed a resource that uses a particular
+ plugin, but the remote site overrides that and instead
+ furnishes the user agent with a resource that triggers a
+ different plugin with different security characteristics. </p>
+
</li>
<li>
@@ -21143,9 +21184,10 @@
</li>
- </ol><p class="note">It is possible for this step to finish with <var title="">resource type</var> still being unknown, or for one of
- the substeps above to jump straight to the next step. In both
- cases, the next step will trigger fallback.</p>
+ </ol><p class="note">It is possible for this step to finish, or for
+ one of the substeps above to jump straight to the next step,
+ with <var title="">resource type</var> still being unknown. In
+ both cases, the next step will trigger fallback.</p>
</li>
@@ -21366,6 +21408,10 @@
<a href="#reflect">reflect</a> the respective content attributes of the same
name.</p>
+ <p>The <dfn id="dom-object-typemustmatch" title="dom-object-typeMustMatch"><code>typeMustMatch</code></dfn> IDL
+ attribute must <a href="#reflect">reflect</a> the <code title="attr-object-typemustmatch"><a href="#attr-object-typemustmatch">typemustmatch</a></code> content
+ attribute.</p>
+
<p>The <dfn id="dom-object-contentdocument" title="dom-object-contentDocument"><code>contentDocument</code></dfn>
IDL attribute must return the <code><a href="#document">Document</a></code> object of the
<a href="#active-document">active document</a> of the <code><a href="#the-object-element">object</a></code> element's
@@ -22393,7 +22439,7 @@
var videoSection = document.getElementById('video');
var videoElement = document.createElement('video');
var support = videoElement.canPlayType('video/x-new-fictional-format;codecs="kittens,bunnies"');
- if (support != "probably" && "New Fictional Video Plug-in" in navigator.plugins) {
+ if (support != "probably" && "New Fictional Video Plugin" in navigator.plugins) {
// not confident of browser support
// but we have a plugin
// so use plugin instead
@@ -69373,6 +69419,7 @@
<td><a href="#global-attributes" title="global attributes">globals</a>;
<code title="attr-object-data"><a href="#attr-object-data">data</a></code>;
<code title="attr-object-type"><a href="#attr-object-type">type</a></code>;
+ <code title="attr-object-typemustmatch"><a href="#attr-object-typemustmatch">typemustmatch</a></code>;
<code title="attr-object-name"><a href="#attr-object-name">name</a></code>;
<code title="attr-hyperlink-usemap"><a href="#attr-hyperlink-usemap">usemap</a></code>;
<code title="attr-fae-form"><a href="#attr-fae-form">form</a></code>;
@@ -70733,6 +70780,10 @@
<td> <code title="attr-menu-type"><a href="#attr-menu-type">menu</a></code>
<td> Type of menu
<td> "<code title="context menu state"><a href="#context-menu-state">context</a></code>"; "<code title="toolbar state"><a href="#toolbar-state">toolbar</a></code>"
+ <tr><th> <code title="">typemustmatch</code>
+ <td> <code title="attr-object-typemustmatch"><a href="#attr-object-typemustmatch">object</a></code>
+ <td> Whether the <code title="attr-object-type"><a href="#attr-object-type">type</a></code> attribute and the <a href="#content-type">Content-Type</a> value need to match for the resource to be used
+ <td> <a href="#boolean-attribute">Boolean attribute</a>
<tr><th> <code title="">usemap</code>
<td> <code title="attr-hyperlink-usemap"><a href="#attr-hyperlink-usemap">img</a></code>;
<code title="attr-hyperlink-usemap"><a href="#attr-hyperlink-usemap">object</a></code>
Received on Friday, 17 June 2011 09:52:44 UTC