grup: patch CVE-2024-45781

Cherry-pick patch mentioning this CVE.

(From OE-Core rev: ef41ef5730d08371d1eb03f94fa9357edf26889f)

Signed-off-by: Peter Marko <peter.marko@siemens.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

2 files changed, 36 insertions, 0 deletions

diff --git a/meta/recipes-bsp/grub/files/CVE-2024-45781.patch b/meta/recipes-bsp/grub/files/CVE-2024-45781.patch
new file mode 100644
index 0000000000..bd0b6aa04a
--- /dev/null
+++ b/meta/recipes-bsp/grub/files/CVE-2024-45781.patch
@@ -0,0 +1,35 @@
+From c1a291b01f4f1dcd6a22b61f1c81a45a966d16ba Mon Sep 17 00:00:00 2001
+From: B Horn <b@horn.uk>
+Date: Sun, 12 May 2024 02:03:33 +0100
+Subject: [PATCH 2/2] fs/ufs: Fix a heap OOB write
+
+grub_strcpy() was used to copy a symlink name from the filesystem
+image to a heap allocated buffer. This led to a OOB write to adjacent
+heap allocations. Fix by using grub_strlcpy().
+
+Fixes: CVE-2024-45781
+
+Reported-by: B Horn <b@horn.uk>
+Signed-off-by: B Horn <b@horn.uk>
+Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
+
+CVE: CVE-2024-45781
+Upstream-Status: Backport [https://git.savannah.gnu.org/cgit/grub.git/commit/?id=c1a291b01f4f1dcd6a22b61f1c81a45a966d16ba]
+Signed-off-by: Peter Marko <peter.marko@siemens.com>
+---
+ grub-core/fs/ufs.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/grub-core/fs/ufs.c b/grub-core/fs/ufs.c
+index a354c92d9..01235101b 100644
+--- a/grub-core/fs/ufs.c
++++ b/grub-core/fs/ufs.c
+@@ -463,7 +463,7 @@ grub_ufs_lookup_symlink (struct grub_ufs_data *data, int ino)
+   /* Check against zero is paylindromic, no need to swap.  */
+   if (data->inode.nblocks == 0
+       && INODE_SIZE (data) <= sizeof (data->inode.symlink))
+-    grub_strcpy (symlink, (char *) data->inode.symlink);
++    grub_strlcpy (symlink, (char *) data->inode.symlink, sz);
+   else
+     {
+       if (grub_ufs_read_file (data, 0, 0, 0, sz, symlink) < 0)
diff --git a/meta/recipes-bsp/grub/grub2.inc b/meta/recipes-bsp/grub/grub2.inc
index 43ba632ce2..58f4a6e181 100644
--- a/meta/recipes-bsp/grub/grub2.inc
+++ b/meta/recipes-bsp/grub/grub2.inc
@@ -19,6 +19,7 @@ SRC_URI = "${GNU_MIRROR}/grub/grub-${PV}.tar.gz \
            file://0001-grub.d-10_linux.in-add-oe-s-kernel-name.patch \
            file://0001-RISC-V-Restore-the-typcast-to-long.patch \
            file://0001-misc-Implement-grub_strlcpy.patch \
+           file://CVE-2024-45781.patch \
 "
 
 SRC_URI[sha256sum] = "b30919fa5be280417c17ac561bb1650f60cfb80cc6237fa1e2b6f56154cb9c91"