Heap-based buffer overflow in the Expand3To4Module::run function in libaudiofile/modules/SimpleModule.h in Audio File Library (aka audiofile) 0.3.6, 0.3.5, 0.3.4, 0.3.3, 0.3.2, 0.3.1, 0.3.0 allows remote attackers to cause a denial of service (crash) via a crafted file.