gnu: libtiff: Fix CVE-2016-9273.

* gnu/packages/patches/libtiff-CVE-2016-9273.patch: New patch.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/image.scm (libtiff/fixed): Use it.

gnu/local.mk

@@ -664,6 +664,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/libtiff-CVE-2016-5321.patch		\
   %D%/packages/patches/libtiff-CVE-2016-5323.patch		\
   %D%/packages/patches/libtiff-CVE-2016-5652.patch		\
+  %D%/packages/patches/libtiff-CVE-2016-9273.patch		\
   %D%/packages/patches/libtiff-oob-accesses-in-decode.patch	\
   %D%/packages/patches/libtiff-oob-write-in-nextdecode.patch	\
   %D%/packages/patches/libtool-skip-tests2.patch		\

gnu/packages/image.scm

@@ -292,7 +292,8 @@ collection of tools for doing simple manipulations of TIFF images.")
                          "libtiff-CVE-2016-5314.patch"
                          "libtiff-CVE-2016-5321.patch"
                          "libtiff-CVE-2016-5323.patch"
-                         "libtiff-CVE-2016-5652.patch"))))))
+                         "libtiff-CVE-2016-5652.patch"
+                         "libtiff-CVE-2016-9273.patch"))))))
 
 (define-public libwmf
   (package

gnu/packages/patches/libtiff-CVE-2016-9273.patch

@@ -0,0 +1,41 @@
+Fix CVE-2016-9273:
+
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9273
+http://bugzilla.maptools.org/show_bug.cgi?id=2587
+
+Patch extracted from upstream CVS repo:
+
+2016-11-10 Even Rouault <even.rouault at spatialys.com>
+
+revision 1.37
+date: 2016-11-09 18:00:49 -0500;  author: erouault;  state: Exp;  lines: +10 -1;  commitid: pzKipPxDJO2dxvtz;
+* libtiff/tif_strip.c: make TIFFNumberOfStrips() return the td->td_nstrips
+value when it is non-zero, instead of recomputing it. This is needed in
+TIFF_STRIPCHOP mode where td_nstrips is modified. Fixes a read outsize of
+array in tiffsplit (or other utilities using TIFFNumberOfStrips()).
+Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2587
+
+Index: libtiff/tif_strip.c
+===================================================================
+RCS file: /cvs/maptools/cvsroot/libtiff/libtiff/tif_strip.c,v
+retrieving revision 1.36
+retrieving revision 1.37
+diff -u -r1.36 -r1.37
+--- a/libtiff/tif_strip.c	7 Jun 2015 22:35:40 -0000	1.36
++++ b/libtiff/tif_strip.c	9 Nov 2016 23:00:49 -0000	1.37
+@@ -63,6 +63,15 @@
+ 	TIFFDirectory *td = &tif->tif_dir;
+ 	uint32 nstrips;
+ 
++    /* If the value was already computed and store in td_nstrips, then return it,
++       since ChopUpSingleUncompressedStrip might have altered and resized the
++       since the td_stripbytecount and td_stripoffset arrays to the new value
++       after the initial affectation of td_nstrips = TIFFNumberOfStrips() in
++       tif_dirread.c ~line 3612.
++       See http://bugzilla.maptools.org/show_bug.cgi?id=2587 */
++    if( td->td_nstrips )
++        return td->td_nstrips;
++
+ 	nstrips = (td->td_rowsperstrip == (uint32) -1 ? 1 :
+ 	     TIFFhowmany_32(td->td_imagelength, td->td_rowsperstrip));
+ 	if (td->td_planarconfig == PLANARCONFIG_SEPARATE)