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Bug 1307730 - Disallow CORS fetches when we have an expanded principal; r=bzbarsky 

It's not possible to construct a useful Origin header when we have
an expanded principal and are about to perform a CORS fetch.  Therefore,
instead of sending a CORS fetch with an |Origin: null| header, we
must fail the request.
This commit is contained in:
Ehsan Akhgari 2016-10-06 15:59:16 -04:00
Родитель 929f35de3b
Коммит 7cbf03adb5
3 изменённых файлов: 52 добавлений и 0 удалений
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1
dom/base/test/mochitest.ini
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@ -630,6 +630,7 @@ skip-if = buildapp == 'b2g'
[test_bug1274806.html]
[test_bug1281963.html]
[test_bug1295852.html]
[test_bug1307730.html]
[test_caretPositionFromPoint.html]
[test_change_policy.html]
skip-if = buildapp == 'b2g' #no ssl support

44
dom/base/test/test_bug1307730.html Normal file
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@ -0,0 +1,44 @@
<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=1307730
-->
<head>
<title>Test for Bug 1307730</title>
<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1307730">Mozilla Bug 1307730</a>
<p id="display"></p>
<div id="content" style="display: none">
</div>
<pre id="test">
<script type="application/javascript">
const Cu = SpecialPowers.Cu;
function runTest() {
var xhr = new XMLHttpRequest();
xhr.open("GET", "https://example.com", false);
try {
xhr.send();
} catch (e) {
return e.name;
}
return 'XHR succeeded';
}
function evalInSandbox(sandbox, func) {
return SpecialPowers.unwrap(Cu.evalInSandbox(`(${func.toString()})()`, sandbox));
}
let sandbox = Cu.Sandbox([window, "https://example.org"],
{wantGlobalProperties: ['XMLHttpRequest']});
is(evalInSandbox(sandbox, runTest), 'NetworkError',
"Shouldn't be able to make a CORS request with an expanded principal");
</script>
</pre>
</body>
</html>

7
netwerk/protocol/http/nsCORSListenerProxy.cpp
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@ -602,6 +602,7 @@ nsCORSListenerProxy::CheckRequestApproved(nsIRequest* aRequest)
}
if (mWithCredentials || !allowedOriginHeader.EqualsLiteral("*")) {
MOZ_ASSERT(!nsContentUtils::IsExpandedPrincipal(mOriginHeaderPrincipal));
nsAutoCString origin;
nsContentUtils::GetASCIIOrigin(mOriginHeaderPrincipal, origin);
@ -950,6 +951,12 @@ nsCORSListenerProxy::UpdateChannel(nsIChannel* aChannel,
uri->GetUserPass(userpass);
NS_ENSURE_TRUE(userpass.IsEmpty(), NS_ERROR_DOM_BAD_URI);
// If we have an expanded principal here, we'll reject the CORS request,
// because we can't send a useful Origin header which is required for CORS.
if (nsContentUtils::IsExpandedPrincipal(mOriginHeaderPrincipal)) {
return NS_ERROR_DOM_BAD_URI;
}
// Add the Origin header
nsAutoCString origin;
rv = nsContentUtils::GetASCIIOrigin(mOriginHeaderPrincipal, origin);