libpng 1.6.1 through 1.6.7 contain a null-pointer dereference vulnerability

Overview libpng versions 1.6.1 through 1.6.7 fail to reject colormapped images with empty palettes, leading to a null-pointer dereference crash in pngdoexpandpalette. Description The PNG Development Group has reported that "libpng versions 1.6.1 through 1.6.7 fail to reject colormapped images wit...