LibTIFF 4.0.0alpha4 4.0.0alpha5 4.0.0alpha6 4.0.0beta7 4.0.0 4.0.1 4.0.2 4.0.3 4.0.4 4.0.4beta 4.0.5 4.0.6 and 4.0.7 allows remote attackers to cause a denial of service (heap-based buffer over-read) or possibly have unspecified other impact via a crafted TIFF image related to \READ of size 512\ and libtiff/tif_unix.c:340:2.