diff options
Diffstat (limited to 'poky/meta/recipes-graphics/cairo/cairo/0001-cairo-Fix-CVE-2017-9814.patch')
-rw-r--r-- | poky/meta/recipes-graphics/cairo/cairo/0001-cairo-Fix-CVE-2017-9814.patch | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/poky/meta/recipes-graphics/cairo/cairo/0001-cairo-Fix-CVE-2017-9814.patch b/poky/meta/recipes-graphics/cairo/cairo/0001-cairo-Fix-CVE-2017-9814.patch new file mode 100644 index 000000000..7d02ab947 --- /dev/null +++ b/poky/meta/recipes-graphics/cairo/cairo/0001-cairo-Fix-CVE-2017-9814.patch @@ -0,0 +1,45 @@ +From 042421e9e3d266ad0bb7805132041ef51ad3234d Mon Sep 17 00:00:00 2001 +From: Adrian Johnson <ajohnson@redneon.com> +Date: Wed, 16 Aug 2017 22:52:35 -0400 +Subject: [PATCH] cairo: Fix CVE-2017-9814 + +The bug happens because in some scenarios the variable size can +have a value of 0 at line 1288. And malloc(0) is not returning +NULL as some people could expect: + + https://stackoverflow.com/questions/1073157/zero-size-malloc + +malloc(0) returns the smallest chunk possible. So the line 1290 +with the return is not execute. And the execution continues with +an invalid map. + +Since the size is 0 the variable map is not initialized correctly +at load_trutype_table. So, later when the variable map is accessed +previous values from a freed chunk are used. This could allows an +attacker to control the variable map. + +This patch have not merge in upstream now. + +Upstream-Status: Backport [https://bugs.freedesktop.org/show_bug.cgi?id=101547] +CVE: CVE-2017-9814 +Signed-off-by: Dengke Du <dengke.du@windriver.com> +--- + src/cairo-truetype-subset.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/src/cairo-truetype-subset.c b/src/cairo-truetype-subset.c +index e3449a0..f77d11c 100644 +--- a/src/cairo-truetype-subset.c ++++ b/src/cairo-truetype-subset.c +@@ -1285,7 +1285,7 @@ _cairo_truetype_reverse_cmap (cairo_scaled_font_t *scaled_font, + return CAIRO_INT_STATUS_UNSUPPORTED; + + size = be16_to_cpu (map->length); +- map = malloc (size); ++ map = _cairo_malloc (size); + if (unlikely (map == NULL)) + return _cairo_error (CAIRO_STATUS_NO_MEMORY); + +-- +2.8.1 + |