Mozilla Firefox nsHTMLSelectElement Remote Code Execution Vulnerability

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Mozilla Firefox. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within nsINode::ReplaceOrInsertBefore() in content/base/src/nsGenericElement.cpp. A use-after-free condition can be triggered by adding an already parented option element to an option collection and then removing its associated select element during an event handler execution. Successful exploitation of this vulnerability will lead to code execution in the context of the browser.