libtiff: fix CVE-2019-17546

Apply unmodified patch from upstream.

(From OE-Core rev: 844e7aa217f5ecf46766a07d46f9d7f083668e8e)

Signed-off-by: Joe Slater <joe.slater@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 103 insertions, 0 deletions

diff --git a/meta/recipes-multimedia/libtiff/tiff/CVE-2019-17546.patch b/meta/recipes-multimedia/libtiff/tiff/CVE-2019-17546.patch
new file mode 100644
index 0000000000..04c5410930
--- /dev/null
+++ b/meta/recipes-multimedia/libtiff/tiff/CVE-2019-17546.patch
@@ -0,0 +1,103 @@
+libtiff: fix CVE-2019-17546
+
+Added after 4.0.10 release.
+
+CVE: CVE-2019-17546
+Upstream-Status: Backport [https://gitlab.com/libtiff/libtiff]
+Signed-off-by: Joe Slater <joe.slater@windriver.com>
+
+commit 4bb584a35f87af42d6cf09d15e9ce8909a839145
+Author: Even Rouault <even.rouault@spatialys.com>
+Date:   Thu Aug 15 15:05:28 2019 +0200
+
+    RGBA interface: fix integer overflow potentially causing write heap buffer overflow, especially on 32 bit builds. Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=16443. Credit to OSS Fuzz
+
+diff --git a/libtiff/tif_getimage.c b/libtiff/tif_getimage.c
+index c88b5fa..4da785d 100644
+--- a/libtiff/tif_getimage.c
++++ b/libtiff/tif_getimage.c
+@@ -949,16 +949,23 @@ gtStripContig(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
+        fromskew = (w < imagewidth ? imagewidth - w : 0);
+        for (row = 0; row < h; row += nrow)
+        {
++               uint32 temp;
+                rowstoread = rowsperstrip - (row + img->row_offset) % rowsperstrip;
+                nrow = (row + rowstoread > h ? h - row : rowstoread);
+                nrowsub = nrow;
+                if ((nrowsub%subsamplingver)!=0)
+                        nrowsub+=subsamplingver-nrowsub%subsamplingver;
++               temp = (row + img->row_offset)%rowsperstrip + nrowsub;
++               if( scanline > 0 && temp > (size_t)(TIFF_TMSIZE_T_MAX / scanline) )
++               {
++                       TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "Integer overflow in gtStripContig");
++                       return 0;
++               }
+                if (_TIFFReadEncodedStripAndAllocBuffer(tif,
+                    TIFFComputeStrip(tif,row+img->row_offset, 0),
+                    (void**)(&buf),
+                     maxstripsize,
+-                   ((row + img->row_offset)%rowsperstrip + nrowsub) * scanline)==(tmsize_t)(-1)
++                   temp * scanline)==(tmsize_t)(-1)
+                    && (buf == NULL || img->stoponerr))
+                {
+                        ret = 0;
+@@ -1051,15 +1058,22 @@ gtStripSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
+        fromskew = (w < imagewidth ? imagewidth - w : 0);
+        for (row = 0; row < h; row += nrow)
+        {
++                uint32 temp;
+                rowstoread = rowsperstrip - (row + img->row_offset) % rowsperstrip;
+                nrow = (row + rowstoread > h ? h - row : rowstoread);
+                offset_row = row + img->row_offset;
++                temp = (row + img->row_offset)%rowsperstrip + nrow;
++                if( scanline > 0 && temp > (size_t)(TIFF_TMSIZE_T_MAX / scanline) )
++                {
++                        TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "Integer overflow in gtStripSeparate");
++                        return 0;
++                }
+                 if( buf == NULL )
+                 {
+                     if (_TIFFReadEncodedStripAndAllocBuffer(
+                             tif, TIFFComputeStrip(tif, offset_row, 0),
+                             (void**) &buf, bufsize,
+-                            ((row + img->row_offset)%rowsperstrip + nrow) * scanline)==(tmsize_t)(-1)
++                            temp * scanline)==(tmsize_t)(-1)
+                         && (buf == NULL || img->stoponerr))
+                     {
+                             ret = 0;
+@@ -1079,7 +1093,7 @@ gtStripSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
+                     }
+                 }
+                else if (TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, offset_row, 0),
+-                   p0, ((row + img->row_offset)%rowsperstrip + nrow) * scanline)==(tmsize_t)(-1)
++                   p0, temp * scanline)==(tmsize_t)(-1)
+                    && img->stoponerr)
+                {
+                        ret = 0;
+@@ -1087,7 +1101,7 @@ gtStripSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
+                }
+                if (colorchannels > 1 
+                     && TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, offset_row, 1),
+-                                            p1, ((row + img->row_offset)%rowsperstrip + nrow) * scanline) == (tmsize_t)(-1)
++                                            p1, temp * scanline) == (tmsize_t)(-1)
+                    && img->stoponerr)
+                {
+                        ret = 0;
+@@ -1095,7 +1109,7 @@ gtStripSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
+                }
+                if (colorchannels > 1 
+                     && TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, offset_row, 2),
+-                                            p2, ((row + img->row_offset)%rowsperstrip + nrow) * scanline) == (tmsize_t)(-1)
++                                            p2, temp * scanline) == (tmsize_t)(-1)
+                    && img->stoponerr)
+                {
+                        ret = 0;
+@@ -1104,7 +1118,7 @@ gtStripSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
+                if (alpha)
+                {
+                        if (TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, offset_row, colorchannels),
+-                           pa, ((row + img->row_offset)%rowsperstrip + nrow) * scanline)==(tmsize_t)(-1)
++                           pa, temp * scanline)==(tmsize_t)(-1)
+                            && img->stoponerr)
+                        {
+                                ret = 0;