[PATCH 1/1] gnu: libtiff: Fix some buffer overflows.

[Leo Famulari <leo@famulari.name>]

* gnu/packages/patches/libtiff-uint32-overflow.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/image.scm (libtiff/fixed)[source]: Use it.
---
 gnu/local.mk                                       |   1 +
 gnu/packages/image.scm                             |   1 +
 gnu/packages/patches/libtiff-uint32-overflow.patch | 102 +++++++++++++++++++++
 3 files changed, 104 insertions(+)
 create mode 100644 gnu/packages/patches/libtiff-uint32-overflow.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index 513bd34..1c27767 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -670,6 +670,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/libtiff-CVE-2016-9297.patch		\
   %D%/packages/patches/libtiff-oob-accesses-in-decode.patch	\
   %D%/packages/patches/libtiff-oob-write-in-nextdecode.patch	\
+  %D%/packages/patches/libtiff-uint32-overflow.patch		\
   %D%/packages/patches/libtool-skip-tests2.patch		\
   %D%/packages/patches/libunwind-CVE-2015-3239.patch		\
   %D%/packages/patches/libupnp-CVE-2016-6255.patch		\
diff --git a/gnu/packages/image.scm b/gnu/packages/image.scm
index d38344a..7458f4e 100644
--- a/gnu/packages/image.scm
+++ b/gnu/packages/image.scm
@@ -291,6 +291,7 @@ collection of tools for doing simple manipulations of TIFF images.")
               (patches (search-patches
                          "libtiff-oob-accesses-in-decode.patch"
                          "libtiff-oob-write-in-nextdecode.patch"
+                         "libtiff-uint32-overflow.patch"
                          "libtiff-CVE-2015-8665+CVE-2015-8683.patch"
                          "libtiff-CVE-2016-3623.patch"
                          "libtiff-CVE-2016-3945.patch"
diff --git a/gnu/packages/patches/libtiff-uint32-overflow.patch b/gnu/packages/patches/libtiff-uint32-overflow.patch
new file mode 100644
index 0000000..b9b1bc2
--- /dev/null
+++ b/gnu/packages/patches/libtiff-uint32-overflow.patch
@@ -0,0 +1,102 @@
+Fix some buffer overflows:
+
+http://seclists.org/oss-sec/2016/q4/
+http://bugzilla.maptools.org/show_bug.cgi?id=2592
+
+2016-11-11 Even Rouault <even.rouault at spatialys.com>
+
+        * tools/tiffcrop.c: fix multiple uint32 overflows in
+        writeBufferToSeparateStrips(), writeBufferToContigTiles() and
+        writeBufferToSeparateTiles() that could cause heap buffer
+overflows.
+        Reported by Henri Salo from Nixu Corporation.
+        Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2592
+
+
+/cvs/maptools/cvsroot/libtiff/ChangeLog,v  <--  ChangeLog
+new revision: 1.1152; previous revision: 1.1151
+/cvs/maptools/cvsroot/libtiff/tools/tiffcrop.c,v  <--  tools/tiffcrop.c
+new revision: 1.43; previous revision: 1.42
+
+===================================================================
+RCS file: /cvs/maptools/cvsroot/libtiff/tools/tiffcrop.c,v
+retrieving revision 1.42
+retrieving revision 1.43
+diff -u -r1.42 -r1.43
+--- libtiff/tools/tiffcrop.c	14 Oct 2016 19:13:20 -0000	1.42
++++ libtiff/tools/tiffcrop.c	11 Nov 2016 19:33:06 -0000	1.43
+@@ -148,6 +148,8 @@
+ #define PATH_MAX 1024
+ #endif
+ 
++#define TIFF_UINT32_MAX     0xFFFFFFFFU
++
+ #ifndef streq
+ #define	streq(a,b)	(strcmp((a),(b)) == 0)
+ #endif
+@@ -1164,7 +1166,24 @@
+   (void) TIFFGetFieldDefaulted(out, TIFFTAG_ROWSPERSTRIP, &rowsperstrip);
+   (void) TIFFGetField(out, TIFFTAG_BITSPERSAMPLE, &bps);
+   bytes_per_sample = (bps + 7) / 8;
+-  rowsize = ((bps * spp * width) + 7) / 8; /* source has interleaved samples */
++  if( width == 0 ||
++      (uint32)bps * (uint32)spp > TIFF_UINT32_MAX / width ||
++      bps * spp * width > TIFF_UINT32_MAX - 7U )
++  {
++      TIFFError(TIFFFileName(out),
++            "Error, uint32 overflow when computing (bps * spp * width) + 7");
++      return 1;
++  }
++  rowsize = ((bps * spp * width) + 7U) / 8; /* source has interleaved samples */
++  if( bytes_per_sample == 0 ||
++      rowsperstrip > TIFF_UINT32_MAX / bytes_per_sample ||
++      rowsperstrip * bytes_per_sample > TIFF_UINT32_MAX / (width + 1) )
++  {
++      TIFFError(TIFFFileName(out),
++                "Error, uint32 overflow when computing rowsperstrip * "
++                "bytes_per_sample * (width + 1)");
++      return 1;
++  }
+   rowstripsize = rowsperstrip * bytes_per_sample * (width + 1); 
+ 
+   obuf = _TIFFmalloc (rowstripsize);
+@@ -1251,11 +1270,19 @@
+     }
+     }
+ 
++  if( imagewidth == 0 ||
++      (uint32)bps * (uint32)spp > TIFF_UINT32_MAX / imagewidth ||
++      bps * spp * imagewidth > TIFF_UINT32_MAX - 7U )
++  {
++      TIFFError(TIFFFileName(out),
++            "Error, uint32 overflow when computing (imagewidth * bps * spp) + 7");
++      return 1;
++  }
++  src_rowsize = ((imagewidth * spp * bps) + 7U) / 8;
++
+   tilebuf = _TIFFmalloc(tile_buffsize);
+   if (tilebuf == 0)
+     return 1;
+-
+-  src_rowsize = ((imagewidth * spp * bps) + 7) / 8;
+   for (row = 0; row < imagelength; row += tl)
+     {
+     nrow = (row + tl > imagelength) ? imagelength - row : tl;
+@@ -1315,7 +1342,16 @@
+   TIFFGetField(out, TIFFTAG_TILELENGTH, &tl);
+   TIFFGetField(out, TIFFTAG_TILEWIDTH, &tw);
+   TIFFGetField(out, TIFFTAG_BITSPERSAMPLE, &bps);
+-  src_rowsize = ((imagewidth * spp * bps) + 7) / 8;
++
++  if( imagewidth == 0 ||
++      (uint32)bps * (uint32)spp > TIFF_UINT32_MAX / imagewidth ||
++      bps * spp * imagewidth > TIFF_UINT32_MAX - 7 )
++  {
++      TIFFError(TIFFFileName(out),
++            "Error, uint32 overflow when computing (imagewidth * bps * spp) + 7");
++      return 1;
++  }
++  src_rowsize = ((imagewidth * spp * bps) + 7U) / 8;
+          
+   for (row = 0; row < imagelength; row += tl)
+     {
-- 
2.10.2