static Image *ReadRLAImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
  typedef struct _WindowFrame
  {
    short
      left,
      right,
      bottom,
      top;
  } WindowFrame;

  typedef struct _RLAInfo
  {
    WindowFrame
      window,
      active_window;

    short
      frame,
      storage_type,
      number_channels,
      number_matte_channels,
      number_auxiliary_channels,
      revision;

    char
      gamma[16],
      red_primary[24],
      green_primary[24],
      blue_primary[24],
      white_point[24];

    ssize_t
      job_number;

    char
      name[128],
      description[128],
      program[64],
      machine[32],
      user[32],
      date[20],
      aspect[24],
      aspect_ratio[8],
      chan[32];

    short
      field;

    char
      time[12],
      filter[32];

    short
      bits_per_channel,
      matte_type,
      matte_bits,
      auxiliary_type,
      auxiliary_bits;

    char
      auxiliary[32],
      space[36];

    ssize_t
      next;
  } RLAInfo;

  Image
    *image;

  int
    channel,
    length,
    runlength;

  MagickBooleanType
    status;

  MagickOffsetType
    offset;

  register ssize_t
    i,
    x;

  register PixelPacket
    *q;

  ssize_t
    count,
    *scanlines,
    y;

  RLAInfo
    rla_info;

  unsigned char
    byte;

  /*
    Open image file.
  */
  assert(image_info != (const ImageInfo *) NULL);
  assert(image_info->signature == MagickSignature);
  if (image_info->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
      image_info->filename);
  assert(exception != (ExceptionInfo *) NULL);
  assert(exception->signature == MagickSignature);
  image=AcquireImage(image_info);
  status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
  if (status == MagickFalse)
    {
      image=DestroyImageList(image);
      return((Image *) NULL);
    }
  rla_info.window.left=(short) ReadBlobMSBShort(image);
  rla_info.window.right=(short) ReadBlobMSBShort(image);
  rla_info.window.bottom=(short) ReadBlobMSBShort(image);
  rla_info.window.top=(short) ReadBlobMSBShort(image);
  rla_info.active_window.left=(short) ReadBlobMSBShort(image);
  rla_info.active_window.right=(short) ReadBlobMSBShort(image);
  rla_info.active_window.bottom=(short) ReadBlobMSBShort(image);
  rla_info.active_window.top=(short) ReadBlobMSBShort(image);
  rla_info.frame=(short) ReadBlobMSBShort(image);
  rla_info.storage_type=(short) ReadBlobMSBShort(image);
  rla_info.number_channels=(short) ReadBlobMSBShort(image);
  rla_info.number_matte_channels=(short) ReadBlobMSBShort(image);
  if (rla_info.number_channels == 0)
    rla_info.number_channels=3;
  rla_info.number_channels+=rla_info.number_matte_channels;
  rla_info.number_auxiliary_channels=(short) ReadBlobMSBShort(image);
  rla_info.revision=(short) ReadBlobMSBShort(image);
  count=ReadBlob(image,16,(unsigned char *) rla_info.gamma);
  count=ReadBlob(image,24,(unsigned char *) rla_info.red_primary);
  count=ReadBlob(image,24,(unsigned char *) rla_info.green_primary);
  count=ReadBlob(image,24,(unsigned char *) rla_info.blue_primary);
  count=ReadBlob(image,24,(unsigned char *) rla_info.white_point);
  rla_info.job_number=(int) ReadBlobMSBLong(image);
  count=ReadBlob(image,128,(unsigned char *) rla_info.name);
  count=ReadBlob(image,128,(unsigned char *) rla_info.description);
  rla_info.description[127]='\0';
  count=ReadBlob(image,64,(unsigned char *) rla_info.program);
  count=ReadBlob(image,32,(unsigned char *) rla_info.machine);
  count=ReadBlob(image,32,(unsigned char *) rla_info.user);
  count=ReadBlob(image,20,(unsigned char *) rla_info.date);
  count=ReadBlob(image,24,(unsigned char *) rla_info.aspect);
  count=ReadBlob(image,8,(unsigned char *) rla_info.aspect_ratio);
  count=ReadBlob(image,32,(unsigned char *) rla_info.chan);
  rla_info.field=(short) ReadBlobMSBShort(image);
  count=ReadBlob(image,12,(unsigned char *) rla_info.time);
  count=ReadBlob(image,32,(unsigned char *) rla_info.filter);
  rla_info.bits_per_channel=(short) ReadBlobMSBShort(image);
  rla_info.matte_type=(short) ReadBlobMSBShort(image);
  rla_info.matte_bits=(short) ReadBlobMSBShort(image);
  rla_info.auxiliary_type=(short) ReadBlobMSBShort(image);
  rla_info.auxiliary_bits=(short) ReadBlobMSBShort(image);
  count=ReadBlob(image,32,(unsigned char *) rla_info.auxiliary);
  count=ReadBlob(image,36,(unsigned char *) rla_info.space);
  if ((size_t) count != 36)
    ThrowReaderException(CorruptImageError,"UnableToReadImageData");
  rla_info.next=(int) ReadBlobMSBLong(image);
  /*
    Initialize image structure.
  */
  image->matte=rla_info.number_matte_channels != 0 ? MagickTrue : MagickFalse;
  image->columns=1UL*rla_info.active_window.right-rla_info.active_window.left+1;
  image->rows=1UL*rla_info.active_window.top-rla_info.active_window.bottom+1;
  if (image_info->ping != MagickFalse)
    {
       (void) CloseBlob(image);
       return(GetFirstImageInList(image));
     }
  status=SetImageExtent(image,image->columns,image->rows);
  if (status == MagickFalse)
    {
      InheritException(exception,&image->exception);
      return(DestroyImageList(image));
    }
   scanlines=(ssize_t *) AcquireQuantumMemory(image->rows,sizeof(*scanlines));
   if (scanlines == (ssize_t *) NULL)
     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
  if (*rla_info.description != '\0')
    (void) SetImageProperty(image,"comment",(char *) rla_info.description);
  /*
    Read offsets to each scanline data.
  */
  for (i=0; i < (ssize_t) image->rows; i++)
    scanlines[i]=(int) ReadBlobMSBLong(image);
  /*
    Read image data.
  */
  x=0;
  for (y=0; y < (ssize_t) image->rows; y++)
  {
    offset=SeekBlob(image,scanlines[image->rows-y-1],SEEK_SET);
    if (offset < 0)
      ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    for (channel=0; channel < (int) rla_info.number_channels; channel++)
    {
      length=(int) ReadBlobMSBShort(image);
      while (length > 0)
      {
        byte=(unsigned char) ReadBlobByte(image);
        runlength=byte;
        if (byte > 127)
          runlength=byte-256;
        length--;
        if (length == 0)
          break;
        if (runlength < 0)
          {
            while (runlength < 0)
            {
              q=GetAuthenticPixels(image,(ssize_t) (x % image->columns),
                (ssize_t) (y % image->rows),1,1,exception);
              if (q == (PixelPacket *) NULL)
                break;
              byte=(unsigned char) ReadBlobByte(image);
              length--;
              switch (channel)
              {
                case 0:
                {
                  SetPixelRed(q,ScaleCharToQuantum(byte));
                  break;
                }
                case 1:
                {
                  SetPixelGreen(q,ScaleCharToQuantum(byte));
                  break;
                }
                case 2:
                {
                  SetPixelBlue(q,ScaleCharToQuantum(byte));
                  break;
                }
                case 3:
                default:
                {
                  SetPixelAlpha(q,ScaleCharToQuantum(byte));
                  break;
                }
              }
              if (SyncAuthenticPixels(image,exception) == MagickFalse)
                break;
              x++;
              runlength++;
            }
            continue;
          }
        byte=(unsigned char) ReadBlobByte(image);
        length--;
        runlength++;
        do
        {
          q=GetAuthenticPixels(image,(ssize_t) (x % image->columns),
            (ssize_t) (y % image->rows),1,1,exception);
          if (q == (PixelPacket *) NULL)
            break;
          switch (channel)
          {
            case 0:
            {
              SetPixelRed(q,ScaleCharToQuantum(byte));
              break;
            }
            case 1:
            {
              SetPixelGreen(q,ScaleCharToQuantum(byte));
              break;
            }
            case 2:
            {
              SetPixelBlue(q,ScaleCharToQuantum(byte));
              break;
            }
            case 3:
            default:
            {
              SetPixelAlpha(q,ScaleCharToQuantum(byte));
              break;
            }
          }
          if (SyncAuthenticPixels(image,exception) == MagickFalse)
            break;
          x++;
          runlength--;
        }
        while (runlength > 0);
      }
    }
    status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
      image->rows);
    if (status == MagickFalse)
      break;
  }
  if (EOFBlob(image) != MagickFalse)
    ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
      image->filename);
  (void) CloseBlob(image);
  return(GetFirstImageInList(image));
}

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.