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From 7949671de268ba3116d113778e5d770574e9f9e3 Mon Sep 17 00:00:00 2001
From: Javier Martinez Canillas <javierm@redhat.com>
Date: Wed, 24 Feb 2021 12:59:29 +0100
Subject: [PATCH] commands/hdparm: Restrict hdparm command when locked down
The command can be used to get/set ATA disk parameters. Some of these can
be dangerous since change the disk behavior. Restrict it when locked down.
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=5c97492a29c6063567b65ed1a069f5e6f4e211f0]
CVE: CVE-2020-27779
Signed-off-by: Marta Rybczynska <marta.rybczynska@huawei.com>
---
grub-core/commands/hdparm.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/grub-core/commands/hdparm.c b/grub-core/commands/hdparm.c
index d3fa966..2e2319e 100644
--- a/grub-core/commands/hdparm.c
+++ b/grub-core/commands/hdparm.c
@@ -436,9 +436,9 @@ static grub_extcmd_t cmd;
GRUB_MOD_INIT(hdparm)
{
- cmd = grub_register_extcmd ("hdparm", grub_cmd_hdparm, 0,
- N_("[OPTIONS] DISK"),
- N_("Get/set ATA disk parameters."), options);
+ cmd = grub_register_extcmd_lockdown ("hdparm", grub_cmd_hdparm, 0,
+ N_("[OPTIONS] DISK"),
+ N_("Get/set ATA disk parameters."), options);
}
GRUB_MOD_FINI(hdparm)
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