static MagickBooleanType WriteARTImage(const ImageInfo *image_info,Image *image)
{
  MagickBooleanType
    status;

  QuantumInfo
    *quantum_info;

  register const PixelPacket
    *p;

  size_t
    length;

  ssize_t
    count,
    y;

  unsigned char
    *pixels;

  /*
    Open output image file.
  */
  assert(image_info != (const ImageInfo *) NULL);
  assert(image_info->signature == MagickSignature);
  assert(image != (Image *) NULL);
  assert(image->signature == MagickSignature);
  if (image->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
  status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
  if (status == MagickFalse)
    return(status);
  if ((image->columns > 65535UL) || (image->rows > 65535UL))
    ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit");
  image->endian=MSBEndian;
  image->depth=1;
  (void) WriteBlobLSBShort(image,0);
  (void) WriteBlobLSBShort(image,(unsigned short) image->columns);
  (void) WriteBlobLSBShort(image,0);
  (void) WriteBlobLSBShort(image,(unsigned short) image->rows);
  (void) TransformImageColorspace(image,sRGBColorspace);
  length=(image->columns+7)/8;
  pixels=(unsigned char *) AcquireQuantumMemory(length,sizeof(*pixels));
  if (pixels == (unsigned char *) NULL)
    ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
  /*
    Convert image to a bi-level image.
  */
  (void) SetImageType(image,BilevelType);
  quantum_info=AcquireQuantumInfo(image_info,image);
  for (y=0; y < (ssize_t) image->rows; y++)
  {
    p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
    if (p == (const PixelPacket *) NULL)
      break;
    (void) ExportQuantumPixels(image,(const CacheView *) NULL,quantum_info,
      GrayQuantum,pixels,&image->exception);
    count=WriteBlob(image,length,pixels);
    if (count != (ssize_t) length)
      ThrowWriterException(CorruptImageError,"UnableToWriteImageData");
    count=WriteBlob(image,(size_t) (-(ssize_t) length) & 0x01,pixels);
    status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
      image->rows);
    if (status == MagickFalse)
      break;
  }
  quantum_info=DestroyQuantumInfo(quantum_info);
  pixels=(unsigned char *) RelinquishMagickMemory(pixels);
  (void) CloseBlob(image);
  return(MagickTrue);
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.