static Image *ReadVICARImage(const ImageInfo *image_info,
  ExceptionInfo *exception)
{
  char
    keyword[MaxTextExtent],
    value[MaxTextExtent];

  Image
    *image;

  int
    c;

  MagickBooleanType
    status,
    value_expected;

  QuantumInfo
    *quantum_info;

  QuantumType
    quantum_type;

  register PixelPacket
    *q;

  size_t
    length;

  ssize_t
    count,
    y;

  unsigned char
    *pixels;

  /*
    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);
    }
  /*
    Decode image header.
  */
  c=ReadBlobByte(image);
  count=1;
  if (c == EOF)
    {
      image=DestroyImage(image);
      return((Image *) NULL);
    }
  length=0;
  image->columns=0;
  image->rows=0;
  while (isgraph(c) && ((image->columns == 0) || (image->rows == 0)))
  {
    if (isalnum(c) == MagickFalse)
      {
        c=ReadBlobByte(image);
        count++;
      }
    else
      {
        register char
          *p;

        /*
          Determine a keyword and its value.
        */
        p=keyword;
        do
        {
          if ((size_t) (p-keyword) < (MaxTextExtent-1))
            *p++=c;
          c=ReadBlobByte(image);
          count++;
        } while (isalnum(c) || (c == '_'));
        *p='\0';
        value_expected=MagickFalse;
        while ((isspace((int) ((unsigned char) c)) != 0) || (c == '='))
        {
          if (c == '=')
            value_expected=MagickTrue;
          c=ReadBlobByte(image);
          count++;
        }
        if (value_expected == MagickFalse)
          continue;
        p=value;
        while (isalnum(c))
        {
          if ((size_t) (p-value) < (MaxTextExtent-1))
            *p++=c;
          c=ReadBlobByte(image);
          count++;
        }
        *p='\0';
        /*
          Assign a value to the specified keyword.
        */
        if (LocaleCompare(keyword,"Label_RECORDS") == 0)
          length=(ssize_t) StringToLong(value);
        if (LocaleCompare(keyword,"LBLSIZE") == 0)
          length=(ssize_t) StringToLong(value);
        if (LocaleCompare(keyword,"RECORD_BYTES") == 0)
          image->columns=StringToUnsignedLong(value);
        if (LocaleCompare(keyword,"NS") == 0)
          image->columns=StringToUnsignedLong(value);
        if (LocaleCompare(keyword,"LINES") == 0)
          image->rows=StringToUnsignedLong(value);
        if (LocaleCompare(keyword,"NL") == 0)
          image->rows=StringToUnsignedLong(value);
      }
    while (isspace((int) ((unsigned char) c)) != 0)
    {
      c=ReadBlobByte(image);
      count++;
    }
  }
  while (count < (ssize_t) length)
  {
    c=ReadBlobByte(image);
    count++;
  }
  if ((image->columns == 0) || (image->rows == 0))
    ThrowReaderException(CorruptImageError,"NegativeOrZeroImageSize");
  image->depth=8;
  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));
    }
   /*
     Read VICAR pixels.
   */
  (void) SetImageColorspace(image,GRAYColorspace);
  quantum_type=GrayQuantum;
  quantum_info=AcquireQuantumInfo(image_info,image);
  if (quantum_info == (QuantumInfo *) NULL)
    ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
  pixels=GetQuantumPixels(quantum_info);
  length=GetQuantumExtent(image,quantum_info,quantum_type);
  for (y=0; y < (ssize_t) image->rows; y++)
  {
    q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
    if (q == (PixelPacket *) NULL)
      break;
    count=ReadBlob(image,length,pixels);
    (void) ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,
      quantum_type,pixels,exception);
    if (SyncAuthenticPixels(image,exception) == MagickFalse)
      break;
    status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
      image->rows);
    if (status == MagickFalse)
      break;
  }
  SetQuantumImageType(image,quantum_type);
  quantum_info=DestroyQuantumInfo(quantum_info);
  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.