Mozilla Firefox was updated to version 3.6.20. It fixes bugs and security issues. Some of these bugs showed evidence of memory corruption under certain circumstances, and we presume that with enough effort at least some of these could be exploited to run arbitrary code. Gary Kwong, Igor Bukanov, Nils and Bob Clary reported memory safety issues which affected Firefox 3.6. * Crash in SVGTextElement.getCharNumAtPosition Security researcher regenrecht reported via TippingPoint"s Zero Day Initiative that a SVG text manipulation routine contained a dangling pointer vulnerability. * Privilege escalation using event handlers Mozilla security researcher moz_bug_r_a_4 reported a vulnerability in event management code that would permit JavaScript to be run in the wrong context, including that of a different website or potentially in a chrome-privileged context. * Dangling pointer vulnerability in appendChild Security researcher regenrecht reported via TippingPoint"s Zero Day Initiative that appendChild did not correctly account for DOM objects it operated upon and could be exploited to dereference an invalid pointer. * Privilege escalation dropping a tab element in content area Mozilla security researcher moz_bug_r_a4 reported that web content could receive chrome privileges if it registered for drop events and a browser tab element was dropped into the content area. * Binary planting vulnerability in ThinkPadSensor::Startup Security researcher Mitja Kolsek of Acros Security reported that ThinkPadSensor::Startup could potentially be exploited to load a malicious DLL into the running process. * Private data leakage using RegExp.input Security researcher shutdown reported that data from other domains could be read when RegExp.input was set