Directory traversal vulnerability in the doSendObjectInfo method in frameworks/av/media/mtp/MtpServer.cpp in Android 4.4.4 allows physically proximate attackers with a direct connection to the target Android device to upload files outside of the sdcard via a .. (dot dot) in a name parameter of an MTP request.
http://www.securityfocus.com/bid/74210
http://www.securityfocus.com/archive/1/535294/100/1100/threaded
http://seclists.org/fulldisclosure/2015/Apr/50
http://packetstormsecurity.com/files/131509/Android-4.4-MTP-Path-Traversal.html