1 files changed, 37 insertions, 0 deletions

diff --git a/meta/recipes-bsp/grub/files/CVE-2020-27779_3.patch b/meta/recipes-bsp/grub/files/CVE-2020-27779_3.patch
new file mode 100644
index 0000000000..f9a6a73ebc
--- /dev/null
+++ b/meta/recipes-bsp/grub/files/CVE-2020-27779_3.patch
@@ -0,0 +1,37 @@
+From e4f5c16f76e137b3beb6b61a6d2435e54fcb495c Mon Sep 17 00:00:00 2001
+From: Javier Martinez Canillas <javierm@redhat.com>
+Date: Wed, 24 Feb 2021 22:59:59 +0100
+Subject: [PATCH] commands/setpci: Restrict setpci command when locked down
+
+This command can set PCI devices register values, which makes it dangerous
+in a locked down configuration. Restrict it so can't be used on this setup.
+
+Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
+Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
+
+Upstream-Status: Backport [https://git.savannah.gnu.org/cgit/grub.git/commit/?id=58b77d4069823b44c5fa916fa8ddfc9c4cd51e02]
+CVE: CVE-2020-27779
+Signed-off-by: Marta Rybczynska <marta.rybczynska@huawei.com>
+---
+ grub-core/commands/setpci.c | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/grub-core/commands/setpci.c b/grub-core/commands/setpci.c
+index d5bc97d..fa2ba7d 100644
+--- a/grub-core/commands/setpci.c
++++ b/grub-core/commands/setpci.c
+@@ -329,10 +329,10 @@ static grub_extcmd_t cmd;
+ 
+ GRUB_MOD_INIT(setpci)
+ {
+-  cmd = grub_register_extcmd ("setpci", grub_cmd_setpci, 0,
+-                             N_("[-s POSITION] [-d DEVICE] [-v VAR] "
+-                                "REGISTER[=VALUE[:MASK]]"),
+-                             N_("Manipulate PCI devices."), options);
++  cmd = grub_register_extcmd_lockdown ("setpci", grub_cmd_setpci, 0,
++                                      N_("[-s POSITION] [-d DEVICE] [-v VAR] "
++                                         "REGISTER[=VALUE[:MASK]]"),
++                                      N_("Manipulate PCI devices."), options);
+ }
+ 
+ GRUB_MOD_FINI(setpci)