Index: GraphicsMagick-1.3.31/coders/miff.c =================================================================== --- GraphicsMagick-1.3.31.orig/coders/miff.c 2018-04-29 20:01:26.000000000 +0200 +++ GraphicsMagick-1.3.31/coders/miff.c 2019-04-16 09:59:57.712527079 +0200 @@ -1772,8 +1772,14 @@ static Image *ReadMIFFImage(const ImageI p=pixels; for (length=0; length < image->columns; ) { - p+=ReadBlob(image,packet_size,p); - length+=*(p-1)+1; + size_t + bytes_read; + + if ((bytes_read=ReadBlob(image,packet_size,p)) != packet_size) + ThrowMIFFReaderException(CorruptImageError,UnexpectedEndOfFile, + image); + p+=bytes_read; + length+=*(p-1)+1; } if (!ImportRLEPixels(image,quantum_type,quantum_size,pixels))