static MagickBooleanType WriteOTBImage(const ImageInfo *image_info,Image *image)
{
#define SetBit(a,i,set) \
  a=(unsigned char) ((set) ? (a) | (1L << (i)) : (a) & ~(1L << (i)))

  MagickBooleanType
    status;

  register const PixelPacket
    *p;

  register ssize_t
    x;

  ssize_t
    y;

  unsigned char
    bit,
    byte,
    info;

  /*
    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);
  (void) TransformImageColorspace(image,sRGBColorspace);
  /*
    Convert image to a bi-level image.
  */
  (void) SetImageType(image,BilevelType);
  info=0;
  if ((image->columns >= 256) || (image->rows >= 256))
    SetBit(info,4,1);
  (void) WriteBlobByte(image,info);
  if ((image->columns >= 256) || (image->rows >= 256))
    {
      (void) WriteBlobMSBShort(image,(unsigned short) image->columns);
      (void) WriteBlobMSBShort(image,(unsigned short) image->rows);
    }
  else
    {
      (void) WriteBlobByte(image,(unsigned char) image->columns);
      (void) WriteBlobByte(image,(unsigned char) image->rows);
    }
  (void) WriteBlobByte(image,1);  /* depth */
  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;
    bit=0;
    byte=0;
    for (x=0; x < (ssize_t) image->columns; x++)
    {
      if (GetPixelLuma(image,p) < (QuantumRange/2.0))
        byte|=0x1 << (7-bit);
      bit++;
      if (bit == 8)
        {
          (void) WriteBlobByte(image,byte);
          bit=0;
          byte=0;
        }
      p++;
    }
    if (bit != 0)
      (void) WriteBlobByte(image,byte);
    if (image->previous == (Image *) NULL)
      {
        status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
          image->rows);
        if (status == MagickFalse)
          break;
      }
  }
  (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.