Title: [199163] trunk
Revision
199163
Author
[email protected]
Date
2016-04-07 11:03:04 -0700 (Thu, 07 Apr 2016)

Log Message

CSP: Should only honor CSP policy delivered in meta tag that is a descendent of <head>
https://bugs.webkit.org/show_bug.cgi?id=59858
<rdar://problem/25603538>

Reviewed by Brent Fulgham.

Source/WebCore:

Ignore the Content Security Policy meta tag if it is not a descendent of <head> as per
section HTML meta Element of the Content Security Policy Level 2 spec., <https://w3c.github.io/webappsec-csp/2/>
(Editor's Draft, 29 August 2015).

Tests: http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head.html
       http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head2.html
       http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head.html
       http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head2.html

* dom/Document.cpp:
(WebCore::Document::processHttpEquiv): Modified to take a boolean argument whether the http-equiv
meta tag is a descendent of <head> and to parse the value of a Content Security Policy http-equiv
only if the http-equiv meta tag is a descendent of <head>.
* dom/Document.h: Add parameter isInDocument to processHttpEquiv(). Remove javadoc-style parameters
from processHttpEquiv() comment as we do not document parameters for non-API functions using such style.
Also write the comment for processHttpEquiv() using C++ style comments instead of a C-style comment.
* html/HTMLMetaElement.cpp:
(WebCore::HTMLMetaElement::process): Pass whether this element is a descendent of <head>. Additionally
update stale comment and move it closer to the code it refers to.

LayoutTests:

Add tests to ensure that we ignore the meta tags for Content-Security-Policy, Content-Security-Policy-Report-Only,
X-WebKit-CSP, and X-WebKit-CSP-Report-Only if it is not a descendent of <head>.

* http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head-expected.txt: Added.
* http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head.html: Added.
* http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head2-expected.txt: Added.
* http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head2.html: Added.
* http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head-expected.txt: Added.
* http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head.html: Added.
* http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head2-expected.txt: Added.
* http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head2.html: Added.

Modified Paths

Added Paths

Diff

Modified: trunk/LayoutTests/ChangeLog (199162 => 199163)


--- trunk/LayoutTests/ChangeLog	2016-04-07 17:59:24 UTC (rev 199162)
+++ trunk/LayoutTests/ChangeLog	2016-04-07 18:03:04 UTC (rev 199163)
@@ -1,3 +1,23 @@
+2016-04-07  Daniel Bates  <[email protected]>
+
+        CSP: Should only honor CSP policy delivered in meta tag that is a descendent of <head>
+        https://bugs.webkit.org/show_bug.cgi?id=59858
+        <rdar://problem/25603538>
+
+        Reviewed by Brent Fulgham.
+
+        Add tests to ensure that we ignore the meta tags for Content-Security-Policy, Content-Security-Policy-Report-Only,
+        X-WebKit-CSP, and X-WebKit-CSP-Report-Only if it is not a descendent of <head>.
+
+        * http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head-expected.txt: Added.
+        * http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head.html: Added.
+        * http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head2-expected.txt: Added.
+        * http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head2.html: Added.
+        * http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head-expected.txt: Added.
+        * http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head.html: Added.
+        * http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head2-expected.txt: Added.
+        * http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head2.html: Added.
+
 2016-04-06  Sam Weinig  <[email protected]>
 
         window.Crypto is missing

Added: trunk/LayoutTests/http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head-expected.txt (0 => 199163)


--- trunk/LayoutTests/http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head-expected.txt	                        (rev 0)
+++ trunk/LayoutTests/http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head-expected.txt	2016-04-07 18:03:04 UTC (rev 199163)
@@ -0,0 +1,3 @@
+This tests that a <meta http-equiv="Content-Security-Policy"> is ignored if it is not a descendent of <head>.
+
+PASS Content Security Policy was ignored.

Added: trunk/LayoutTests/http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head.html (0 => 199163)


--- trunk/LayoutTests/http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head.html	                        (rev 0)
+++ trunk/LayoutTests/http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head.html	2016-04-07 18:03:04 UTC (rev 199163)
@@ -0,0 +1,17 @@
+<!DOCTYPE>
+<html>
+<head>
+<script>
+if (window.testRunner)
+    testRunner.dumpAsText();
+</script>
+</head>
+<body>
+<p>This tests that a &lt;meta http-equiv=&quot;Content-Security-Policy&quot;&gt; is ignored if it is not a descendent of &lt;head&gt;.</p>
+<meta http-equiv="Content-Security-Policy" content="script-src 'self'">
+<p id="result">FAIL Content Security Policy should have been ignored. But was honored.</p>
+<script>
+document.getElementById("result").textContent = 'PASS Content Security Policy was ignored.';
+</script>
+</body>
+</html>

Added: trunk/LayoutTests/http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head2-expected.txt (0 => 199163)


--- trunk/LayoutTests/http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head2-expected.txt	                        (rev 0)
+++ trunk/LayoutTests/http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head2-expected.txt	2016-04-07 18:03:04 UTC (rev 199163)
@@ -0,0 +1,3 @@
+This tests that a <meta http-equiv="X-WebKit-CSP"> is ignored if it is not a descendent of <head>.
+
+PASS Content Security Policy was ignored.

Added: trunk/LayoutTests/http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head2.html (0 => 199163)


--- trunk/LayoutTests/http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head2.html	                        (rev 0)
+++ trunk/LayoutTests/http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head2.html	2016-04-07 18:03:04 UTC (rev 199163)
@@ -0,0 +1,17 @@
+<!DOCTYPE>
+<html>
+<head>
+<script>
+if (window.testRunner)
+    testRunner.dumpAsText();
+</script>
+</head>
+<body>
+<p>This tests that a &lt;meta http-equiv=&quot;X-WebKit-CSP&quot;&gt; is ignored if it is not a descendent of &lt;head&gt;.</p>
+<meta http-equiv="X-WebKit-CSP" content="script-src 'self'">
+<p id="result">FAIL Content Security Policy should have been ignored. But was honored.</p>
+<script>
+document.getElementById("result").textContent = 'PASS Content Security Policy was ignored.';
+</script>
+</body>
+</html>

Added: trunk/LayoutTests/http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head-expected.txt (0 => 199163)


--- trunk/LayoutTests/http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head-expected.txt	                        (rev 0)
+++ trunk/LayoutTests/http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head-expected.txt	2016-04-07 18:03:04 UTC (rev 199163)
@@ -0,0 +1 @@
+This tests that a <meta http-equiv="Content-Security-Policy-Report-Only"> is ignored if it is not a descendent of <head>. This test PASSED if there are no console warnings. Otherwise, it FAILED.

Added: trunk/LayoutTests/http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head.html (0 => 199163)


--- trunk/LayoutTests/http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head.html	                        (rev 0)
+++ trunk/LayoutTests/http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head.html	2016-04-07 18:03:04 UTC (rev 199163)
@@ -0,0 +1,16 @@
+<!DOCTYPE>
+<html>
+<head>
+<script>
+if (window.testRunner)
+    testRunner.dumpAsText();
+</script>
+</head>
+<body>
+<p>This tests that a &lt;meta http-equiv=&quot;Content-Security-Policy-Report-Only&quot;&gt; is ignored if it is not a descendent of &lt;head&gt;. This test PASSED if there are no console warnings. Otherwise, it FAILED.</p>
+<meta http-equiv="Content-Security-Policy-Report-Only" content="script-src 'self'">
+<script>
+// Do nothing
+</script>
+</body>
+</html>

Added: trunk/LayoutTests/http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head2-expected.txt (0 => 199163)


--- trunk/LayoutTests/http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head2-expected.txt	                        (rev 0)
+++ trunk/LayoutTests/http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head2-expected.txt	2016-04-07 18:03:04 UTC (rev 199163)
@@ -0,0 +1 @@
+This tests that a <meta http-equiv="X-WebKit-CSP-Report-Only"> is ignored if it is not a descendent of <head>. This test PASSED if there are no console warnings. Otherwise, it FAILED.

Added: trunk/LayoutTests/http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head2.html (0 => 199163)


--- trunk/LayoutTests/http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head2.html	                        (rev 0)
+++ trunk/LayoutTests/http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head2.html	2016-04-07 18:03:04 UTC (rev 199163)
@@ -0,0 +1,16 @@
+<!DOCTYPE>
+<html>
+<head>
+<script>
+if (window.testRunner)
+    testRunner.dumpAsText();
+</script>
+</head>
+<body>
+<p>This tests that a &lt;meta http-equiv=&quot;X-WebKit-CSP-Report-Only&quot;&gt; is ignored if it is not a descendent of &lt;head&gt;. This test PASSED if there are no console warnings. Otherwise, it FAILED.</p>
+<meta http-equiv="X-WebKit-CSP-Report-Only" content="script-src 'self'">
+<script>
+// Do nothing
+</script>
+</body>
+</html>

Modified: trunk/Source/WebCore/ChangeLog (199162 => 199163)


--- trunk/Source/WebCore/ChangeLog	2016-04-07 17:59:24 UTC (rev 199162)
+++ trunk/Source/WebCore/ChangeLog	2016-04-07 18:03:04 UTC (rev 199163)
@@ -1,3 +1,31 @@
+2016-04-07  Daniel Bates  <[email protected]>
+
+        CSP: Should only honor CSP policy delivered in meta tag that is a descendent of <head>
+        https://bugs.webkit.org/show_bug.cgi?id=59858
+        <rdar://problem/25603538>
+
+        Reviewed by Brent Fulgham.
+
+        Ignore the Content Security Policy meta tag if it is not a descendent of <head> as per
+        section HTML meta Element of the Content Security Policy Level 2 spec., <https://w3c.github.io/webappsec-csp/2/>
+        (Editor's Draft, 29 August 2015).
+
+        Tests: http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head.html
+               http/tests/security/contentSecurityPolicy/meta-tag-ignored-if-not-in-head2.html
+               http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head.html
+               http/tests/security/contentSecurityPolicy/report-only-meta-tag-ignored-if-not-in-head2.html
+
+        * dom/Document.cpp:
+        (WebCore::Document::processHttpEquiv): Modified to take a boolean argument whether the http-equiv
+        meta tag is a descendent of <head> and to parse the value of a Content Security Policy http-equiv
+        only if the http-equiv meta tag is a descendent of <head>.
+        * dom/Document.h: Add parameter isInDocument to processHttpEquiv(). Remove javadoc-style parameters
+        from processHttpEquiv() comment as we do not document parameters for non-API functions using such style.
+        Also write the comment for processHttpEquiv() using C++ style comments instead of a C-style comment.
+        * html/HTMLMetaElement.cpp:
+        (WebCore::HTMLMetaElement::process): Pass whether this element is a descendent of <head>. Additionally
+        update stale comment and move it closer to the code it refers to.
+
 2016-04-07  Brent Fulgham  <[email protected]>
 
         [Win] Output WebCore.pdb to the same location as WebCore.lib

Modified: trunk/Source/WebCore/dom/Document.cpp (199162 => 199163)


--- trunk/Source/WebCore/dom/Document.cpp	2016-04-07 17:59:24 UTC (rev 199162)
+++ trunk/Source/WebCore/dom/Document.cpp	2016-04-07 18:03:04 UTC (rev 199163)
@@ -3219,9 +3219,10 @@
     return authorSheets.usesStyleBasedEditability();
 }
 
-void Document::processHttpEquiv(const String& equiv, const String& content)
+void Document::processHttpEquiv(const String& equiv, const String& content, bool isInDocumentHead)
 {
-    ASSERT(!equiv.isNull() && !content.isNull());
+    ASSERT(!equiv.isNull());
+    ASSERT(!content.isNull());
 
     HttpEquivPolicy policy = httpEquivPolicy();
     if (policy != HttpEquivPolicy::Enabled) {
@@ -3316,19 +3317,23 @@
         break;
 
     case HTTPHeaderName::ContentSecurityPolicy:
-        contentSecurityPolicy()->processHTTPEquiv(content, ContentSecurityPolicyHeaderType::Enforce);
+        if (isInDocumentHead)
+            contentSecurityPolicy()->processHTTPEquiv(content, ContentSecurityPolicyHeaderType::Enforce);
         break;
 
     case HTTPHeaderName::ContentSecurityPolicyReportOnly:
-        contentSecurityPolicy()->processHTTPEquiv(content, ContentSecurityPolicyHeaderType::Report);
+        if (isInDocumentHead)
+            contentSecurityPolicy()->processHTTPEquiv(content, ContentSecurityPolicyHeaderType::Report);
         break;
 
     case HTTPHeaderName::XWebKitCSP:
-        contentSecurityPolicy()->processHTTPEquiv(content, ContentSecurityPolicyHeaderType::PrefixedEnforce);
+        if (isInDocumentHead)
+            contentSecurityPolicy()->processHTTPEquiv(content, ContentSecurityPolicyHeaderType::PrefixedEnforce);
         break;
 
     case HTTPHeaderName::XWebKitCSPReportOnly:
-        contentSecurityPolicy()->processHTTPEquiv(content, ContentSecurityPolicyHeaderType::PrefixedReport);
+        if (isInDocumentHead)
+            contentSecurityPolicy()->processHTTPEquiv(content, ContentSecurityPolicyHeaderType::PrefixedReport);
         break;
 
     default:

Modified: trunk/Source/WebCore/dom/Document.h (199162 => 199163)


--- trunk/Source/WebCore/dom/Document.h	2016-04-07 17:59:24 UTC (rev 199162)
+++ trunk/Source/WebCore/dom/Document.h	2016-04-07 18:03:04 UTC (rev 199163)
@@ -826,16 +826,11 @@
 
     CSSStyleDeclaration* getOverrideStyle(Element*, const String& pseudoElt);
 
-    /**
-     * Handles a HTTP header equivalent set by a meta tag using <meta http-equiv="..." content="...">. This is called
-     * when a meta tag is encountered during document parsing, and also when a script dynamically changes or adds a meta
-     * tag. This enables scripts to use meta tags to perform refreshes and set expiry dates in addition to them being
-     * specified in a HTML file.
-     *
-     * @param equiv The http header name (value of the meta tag's "equiv" attribute)
-     * @param content The header value (value of the meta tag's "content" attribute)
-     */
-    void processHttpEquiv(const String& equiv, const String& content);
+    // Handles an HTTP header equivalent set by a meta tag using <meta http-equiv="..." content="...">. This is called
+    // when a meta tag is encountered during document parsing, and also when a script dynamically changes or adds a meta
+    // tag. This enables scripts to use meta tags to perform refreshes and set expiry dates in addition to them being
+    // specified in an HTML file.
+    void processHttpEquiv(const String& equiv, const String& content, bool isInDocumentHead);
 
 #if PLATFORM(IOS)
     void processFormatDetection(const String&);

Modified: trunk/Source/WebCore/html/HTMLMetaElement.cpp (199162 => 199163)


--- trunk/Source/WebCore/html/HTMLMetaElement.cpp	2016-04-07 17:59:24 UTC (rev 199162)
+++ trunk/Source/WebCore/html/HTMLMetaElement.cpp	2016-04-07 18:03:04 UTC (rev 199163)
@@ -25,6 +25,7 @@
 
 #include "Attribute.h"
 #include "Document.h"
+#include "HTMLHeadElement.h"
 #include "HTMLNames.h"
 
 namespace WebCore {
@@ -64,6 +65,7 @@
 
 void HTMLMetaElement::process()
 {
+    // Changing a meta tag while it's not in the tree shouldn't have any effect on the document.
     if (!inDocument())
         return;
 
@@ -82,11 +84,9 @@
     else if (equalLettersIgnoringASCIICase(name(), "referrer"))
         document().processReferrerPolicy(contentValue);
 
-    // Get the document to process the tag, but only if we're actually part of DOM tree (changing a meta tag while
-    // it's not in the tree shouldn't have any effect on the document)
     const AtomicString& httpEquivValue = fastGetAttribute(http_equivAttr);
     if (!httpEquivValue.isNull())
-        document().processHttpEquiv(httpEquivValue, contentValue);
+        document().processHttpEquiv(httpEquivValue, contentValue, isDescendantOf(document().head()));
 }
 
 const AtomicString& HTMLMetaElement::content() const
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