libtiff: fix CVE-2023-26965 heap-based use after free

Upstream-Status: Backport from https://gitlab.com/libtiff/libtiff/-/commit/ec8ef90c1f573c9eb1f17d6a056aa0015f184acf

Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

2 files changed, 98 insertions, 0 deletions

diff --git a/meta/recipes-multimedia/libtiff/tiff/CVE-2023-26965.patch b/meta/recipes-multimedia/libtiff/tiff/CVE-2023-26965.patch
new file mode 100644
index 0000000000..2162493e34
--- /dev/null
+++ b/meta/recipes-multimedia/libtiff/tiff/CVE-2023-26965.patch
@@ -0,0 +1,97 @@
+From ec8ef90c1f573c9eb1f17d6a056aa0015f184acf Mon Sep 17 00:00:00 2001
+From: Su_Laus <sulau@freenet.de>
+Date: Tue, 14 Feb 2023 20:43:43 +0100
+Subject: [PATCH] tiffcrop: Do not reuse input buffer for subsequent images.
+ Fix issue 527
+
+Reuse of read_buff within loadImage() from previous image is quite unsafe, because other functions (like rotateImage() etc.) reallocate that buffer with different size without updating the local prev_readsize value.
+
+Closes #527
+
+Upstream-Status: Backport [https://gitlab.com/libtiff/libtiff/-/commit/ec8ef90c1f573c9eb1f17d6a056aa0015f184acf]
+CVE: CVE-2023-26965
+Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>
+---
+ tools/tiffcrop.c | 47 +++++++++++++++--------------------------------
+ 1 file changed, 15 insertions(+), 32 deletions(-)
+
+diff --git a/tools/tiffcrop.c b/tools/tiffcrop.c
+index b811fbb..ce77c74 100644
+--- a/tools/tiffcrop.c
++++ b/tools/tiffcrop.c
+@@ -6066,9 +6066,7 @@ loadImage(TIFF* in, struct image_data *image, struct dump_opts *dump, unsigned c
+   uint32_t   tw = 0, tl = 0;       /* Tile width and length */
+   tmsize_t   tile_rowsize = 0;
+   unsigned char *read_buff = NULL;
+-  unsigned char *new_buff  = NULL;
+   int      readunit = 0;
+-  static   tmsize_t  prev_readsize = 0;
+ 
+   TIFFGetFieldDefaulted(in, TIFFTAG_BITSPERSAMPLE, &bps);
+   TIFFGetFieldDefaulted(in, TIFFTAG_SAMPLESPERPIXEL, &spp);
+@@ -6361,47 +6359,32 @@ loadImage(TIFF* in, struct image_data *image, struct dump_opts *dump, unsigned c
+     }
+  
+   read_buff = *read_ptr;
+-  /* +3 : add a few guard bytes since reverseSamples16bits() can read a bit */
+-  /* outside buffer */
+-  if (!read_buff)
+-  {
+-    if( buffsize > 0xFFFFFFFFU - 3 )
++    /* +3 : add a few guard bytes since reverseSamples16bits() can read a bit
++     * outside buffer */
++    /* Reuse of read_buff from previous image is quite unsafe, because other
++     * functions (like rotateImage() etc.) reallocate that buffer with different
++     * size without updating the local prev_readsize value. */
++   if (read_buff)
+     {
+-        TIFFError("loadImage", "Unable to allocate/reallocate read buffer");
+-        return (-1);
++        _TIFFfree(read_buff);
+     }
+-    read_buff = (unsigned char *)limitMalloc(buffsize + NUM_BUFF_OVERSIZE_BYTES);
+-  }
+-  else
++    if (buffsize > 0xFFFFFFFFU - 3)
+     {
+-    if (prev_readsize < buffsize)
+-    {
+-      if( buffsize > 0xFFFFFFFFU - 3 )
+-      {
+-          TIFFError("loadImage", "Unable to allocate/reallocate read buffer");
+-          return (-1);
+-      }
+-      new_buff = _TIFFrealloc(read_buff, buffsize + NUM_BUFF_OVERSIZE_BYTES);
+-      if (!new_buff)
+-        {
+-	free (read_buff);
+-        read_buff = (unsigned char *)limitMalloc(buffsize + NUM_BUFF_OVERSIZE_BYTES);
+-        }
+-      else
+-        read_buff = new_buff;
+-      }
++        TIFFError("loadImage", "Required read buffer size too large");
++        return (-1);
+     }
+-  if (!read_buff)
++    read_buff =
++        (unsigned char *)limitMalloc(buffsize + NUM_BUFF_OVERSIZE_BYTES);
++    if (!read_buff)
+     {
+-    TIFFError("loadImage", "Unable to allocate/reallocate read buffer");
+-    return (-1);
++        TIFFError("loadImage", "Unable to allocate read buffer");
++        return (-1);
+     }
+ 
+   read_buff[buffsize] = 0;
+   read_buff[buffsize+1] = 0;
+   read_buff[buffsize+2] = 0;
+ 
+-  prev_readsize = buffsize;
+   *read_ptr = read_buff;
+ 
+   /* N.B. The read functions used copy separate plane data into a buffer as interleaved
+-- 
+2.25.1
+
diff --git a/meta/recipes-multimedia/libtiff/tiff_4.3.0.bb b/meta/recipes-multimedia/libtiff/tiff_4.3.0.bb
index 2ee10fca72..4796dfde24 100644
--- a/meta/recipes-multimedia/libtiff/tiff_4.3.0.bb
+++ b/meta/recipes-multimedia/libtiff/tiff_4.3.0.bb
@@ -37,6 +37,7 @@ SRC_URI = "http://download.osgeo.org/libtiff/tiff-${PV}.tar.gz \
            file://CVE-2023-0795_0796_0797_0798_0799.patch \
            file://CVE-2023-25433.patch \
            file://CVE-2023-25434-CVE-2023-25435.patch \
+           file://CVE-2023-26965.patch \
            "
 
 SRC_URI[sha256sum] = "0e46e5acb087ce7d1ac53cf4f56a09b221537fc86dfc5daaad1c2e89e1b37ac8"