# Changes in TIFF v4.0.2

References
Current Version | v4.0.2 (tag Release-v4-0-2)
Previous Version | v4.0.1
Master Download Site | https://download.osgeo.org/libtiff/
Master HTTP Site | https://download.osgeo.org/libtiff/

This document describes the changes made to the software between the previous and current versions (see above). If you don’t find something listed here, then it was not done in this timeframe, or it was not considered important enough to be mentioned. The following information is located here

## Major changes

- None

## Software configuration changes

- None

## Library changes

- `tif_getimage.c`: added support for _SEPARATED CMYK images.

- `tif_getimage.c`: Added support for greyscale + alpha.

- Added `TIFFCreateCustomDirectory()` and `TIFFCreateEXIFDirectory` functions.

- `tif_print.c`: Lots of fixes around printing corrupt or hostile input.

- Improve handling of corrupt ycbcrsubsampling values.

- `tif_unix.c`: use `strerror()` to get meaningful error messages.

- `tif_jpeg.c`: fix serious bugs in `JPEGDecodeRaw()`.

- `tif_jpeg.c`: Fix size overflow (zdi-can-1221, CVE-2012-1173).

## Tools changes

- tiff2pdf: Defend against integer overflows while calculating required buffer sizes (CVE-2012-2113).

## Contributed software changes

- None