Apple Safari WebKit Integer Overflow in NodeRareData::m_connectedFrameCount

This strike exploits a vulnerability in Apple Webkit. Specifically, an attacker can cause an integer overflow in NodeRareData::m_connectedFrameCount by inserting a large number of iframe elements into a DOM node that already has cached subframes. Doing this can cause type confusion to occur leading to a denial of service in the browser, and it can also lead to a UXSS attack.