epiphany: fix CVE-2022-29536

(From OE-Core rev: 507b9de9df375721cd307163fe06c3ee567385e8)

Signed-off-by: Lee Chee Yang <chee.yang.lee@intel.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/recipes-gnome/epiphany/epiphany_3.34.4.bb

@@ -16,6 +16,7 @@ REQUIRED_DISTRO_FEATURES = "x11 opengl"
 
 SRC_URI = "${GNOME_MIRROR}/${GNOMEBN}/${@gnome_verdir("${PV}")}/${GNOMEBN}-${PV}.tar.${GNOME_COMPRESS_TYPE};name=archive \
            file://0002-help-meson.build-disable-the-use-of-yelp.patch \
+           file://CVE-2022-29536.patch \
            "
 SRC_URI[archive.md5sum] = "a559f164bb7d6cbeceb348648076830b"
 SRC_URI[archive.sha256sum] = "60e190fc07ec7e33472e60c7e633e04004f7e277a0ffc5e9cd413706881e598d"

meta/recipes-gnome/epiphany/files/CVE-2022-29536.patch

@@ -0,0 +1,46 @@
+CVE: CVE-2022-29536
+Upstream-Status: Backport [ https://gitlab.gnome.org/GNOME/epiphany/-/commit/486da133569ebfc436c959a7419565ab102e8525 ]
+Signed-off-by: Lee Chee Yang <chee.yang.lee@intel.com>
+
+From 486da133569ebfc436c959a7419565ab102e8525 Mon Sep 17 00:00:00 2001
+From: Michael Catanzaro <mcatanzaro@redhat.com>
+Date: Fri, 15 Apr 2022 18:09:46 -0500
+Subject: [PATCH] Fix memory corruption in ephy_string_shorten()
+
+This fixes a regression that I introduced in 232c613472b38ff0d0d97338f366024ddb9cd228.
+
+I got my browser stuck in a crash loop today while visiting a website
+with a page title greater than ephy-embed.c's MAX_TITLE_LENGTH, the only
+condition in which ephy_string_shorten() is ever used. Turns out this
+commit is wrong: an ellipses is a multibyte character (three bytes in
+UTF-8) and so we're writing past the end of the buffer when calling
+strcat() here. Ooops.
+
+Shame it took nearly four years to notice and correct this.
+
+Part-of: <https://gitlab.gnome.org/GNOME/epiphany/-/merge_requests/1106>
+---
+ lib/ephy-string.c | 5 ++---
+ 1 file changed, 2 insertions(+), 3 deletions(-)
+
+diff --git a/lib/ephy-string.c b/lib/ephy-string.c
+index 35a148ab32..8e524d52ca 100644
+--- a/lib/ephy-string.c
++++ b/lib/ephy-string.c
+@@ -114,11 +114,10 @@ ephy_string_shorten (char  *str,
+   /* create string */
+   bytes = GPOINTER_TO_UINT (g_utf8_offset_to_pointer (str, target_length - 1) - str);
+ 
+-  /* +1 for ellipsis, +1 for trailing NUL */
+-  new_str = g_new (gchar, bytes + 1 + 1);
++  new_str = g_new (gchar, bytes + strlen ("…") + 1);
+ 
+   strncpy (new_str, str, bytes);
+-  strcat (new_str, "…");
++  strncpy (new_str + bytes, "…", strlen ("…") + 1);
+ 
+   g_free (str);
+ 
+-- 
+GitLab
+