MagickExport MagickBooleanType ClutImage(Image *image,const Image *clut_image,
  const PixelInterpolateMethod method,ExceptionInfo *exception)
{
#define ClutImageTag  "Clut/Image"

  CacheView
    *clut_view,
    *image_view;

  MagickBooleanType
    status;

  MagickOffsetType
    progress;

  PixelInfo
    *clut_map;

  register ssize_t
    i;

  ssize_t adjust,
    y;

  assert(image != (Image *) NULL);
  assert(image->signature == MagickCoreSignature);
  if (image->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
  assert(clut_image != (Image *) NULL);
  assert(clut_image->signature == MagickCoreSignature);
  if (SetImageStorageClass(image,DirectClass,exception) == MagickFalse)
    return(MagickFalse);
  if ((IsGrayColorspace(image->colorspace) != MagickFalse) &&
      (IsGrayColorspace(clut_image->colorspace) == MagickFalse))
    (void) SetImageColorspace(image,sRGBColorspace,exception);
  clut_map=(PixelInfo *) AcquireQuantumMemory(MaxMap+1UL,sizeof(*clut_map));
  if (clut_map == (PixelInfo *) NULL)
    ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
      image->filename);
  /*
    Clut image.
  */
  status=MagickTrue;
  progress=0;
  adjust=(ssize_t) (clut_image->interpolate == IntegerInterpolatePixel ? 0 : 1);
  clut_view=AcquireVirtualCacheView(clut_image,exception);
  for (i=0; i <= (ssize_t) MaxMap; i++)
  {
    GetPixelInfo(clut_image,clut_map+i);
    status=InterpolatePixelInfo(clut_image,clut_view,method,
      (double) i*(clut_image->columns-adjust)/MaxMap,(double) i*
      (clut_image->rows-adjust)/MaxMap,clut_map+i,exception);
    if (status == MagickFalse)
      break;
  }
  clut_view=DestroyCacheView(clut_view);
  image_view=AcquireAuthenticCacheView(image,exception);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
  #pragma omp parallel for schedule(static) shared(progress,status) \
    magick_number_threads(image,image,image->rows,1)
#endif
  for (y=0; y < (ssize_t) image->rows; y++)
  {
    PixelInfo
      pixel;

    register Quantum
      *magick_restrict q;

    register ssize_t
      x;

    if (status == MagickFalse)
      continue;
    q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception);
    if (q == (Quantum *) NULL)
      {
        status=MagickFalse;
        continue;
      }
    GetPixelInfo(image,&pixel);
    for (x=0; x < (ssize_t) image->columns; x++)
    {
      PixelTrait
        traits;

      GetPixelInfoPixel(image,q,&pixel);
      traits=GetPixelChannelTraits(image,RedPixelChannel);
      if ((traits & UpdatePixelTrait) != 0)
        pixel.red=clut_map[ScaleQuantumToMap(ClampToQuantum(
          pixel.red))].red;
      traits=GetPixelChannelTraits(image,GreenPixelChannel);
      if ((traits & UpdatePixelTrait) != 0)
        pixel.green=clut_map[ScaleQuantumToMap(ClampToQuantum(
          pixel.green))].green;
      traits=GetPixelChannelTraits(image,BluePixelChannel);
      if ((traits & UpdatePixelTrait) != 0)
        pixel.blue=clut_map[ScaleQuantumToMap(ClampToQuantum(
          pixel.blue))].blue;
      traits=GetPixelChannelTraits(image,BlackPixelChannel);
      if ((traits & UpdatePixelTrait) != 0)
        pixel.black=clut_map[ScaleQuantumToMap(ClampToQuantum(
          pixel.black))].black;
      traits=GetPixelChannelTraits(image,AlphaPixelChannel);
      if ((traits & UpdatePixelTrait) != 0)
        pixel.alpha=clut_map[ScaleQuantumToMap(ClampToQuantum(
          pixel.alpha))].alpha;
      SetPixelViaPixelInfo(image,&pixel,q);
      q+=GetPixelChannels(image);
    }
    if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
      status=MagickFalse;
    if (image->progress_monitor != (MagickProgressMonitor) NULL)
      {
        MagickBooleanType
          proceed;

#if defined(MAGICKCORE_OPENMP_SUPPORT)
        #pragma omp atomic
#endif
        progress++;
        proceed=SetImageProgress(image,ClutImageTag,progress,image->rows);
        if (proceed == MagickFalse)
          status=MagickFalse;
      }
  }
  image_view=DestroyCacheView(image_view);
  clut_map=(PixelInfo *) RelinquishMagickMemory(clut_map);
  if ((clut_image->alpha_trait != UndefinedPixelTrait) &&
      ((GetPixelAlphaTraits(image) & UpdatePixelTrait) != 0))
    (void) SetImageAlphaChannel(image,ActivateAlphaChannel,exception);
  return(status);
}

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.