diff options
Diffstat (limited to 'user/tiff/CVE-2019-7663.patch')
| -rw-r--r-- | user/tiff/CVE-2019-7663.patch | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/user/tiff/CVE-2019-7663.patch b/user/tiff/CVE-2019-7663.patch new file mode 100644 index 000000000..8049566c6 --- /dev/null +++ b/user/tiff/CVE-2019-7663.patch @@ -0,0 +1,37 @@ +From 802d3cbf3043be5dce5317e140ccb1c17a6a2d39 Mon Sep 17 00:00:00 2001 +From: Thomas Bernard <miniupnp@free.fr> +Date: Tue, 29 Jan 2019 11:21:47 +0100 +Subject: [PATCH] TIFFWriteDirectoryTagTransferfunction() : fix NULL + dereferencing + +http://bugzilla.maptools.org/show_bug.cgi?id=2833 + +we must check the pointer is not NULL before memcmp() the memory +--- + libtiff/tif_dirwrite.c | 6 ++++-- + 1 file changed, 4 insertions(+), 2 deletions(-) + +diff --git a/libtiff/tif_dirwrite.c b/libtiff/tif_dirwrite.c +index c15a28db..ef30c869 100644 +--- a/libtiff/tif_dirwrite.c ++++ b/libtiff/tif_dirwrite.c +@@ -1893,12 +1893,14 @@ TIFFWriteDirectoryTagTransferfunction(TIFF* tif, uint32* ndir, TIFFDirEntry* dir + n=3; + if (n==3) + { +- if (!_TIFFmemcmp(tif->tif_dir.td_transferfunction[0],tif->tif_dir.td_transferfunction[2],m*sizeof(uint16))) ++ if (tif->tif_dir.td_transferfunction[2] == NULL || ++ !_TIFFmemcmp(tif->tif_dir.td_transferfunction[0],tif->tif_dir.td_transferfunction[2],m*sizeof(uint16))) + n=2; + } + if (n==2) + { +- if (!_TIFFmemcmp(tif->tif_dir.td_transferfunction[0],tif->tif_dir.td_transferfunction[1],m*sizeof(uint16))) ++ if (tif->tif_dir.td_transferfunction[1] == NULL || ++ !_TIFFmemcmp(tif->tif_dir.td_transferfunction[0],tif->tif_dir.td_transferfunction[1],m*sizeof(uint16))) + n=1; + } + if (n==0) +-- +2.21.0 + |