diff options
Diffstat (limited to 'meta/recipes-bsp/grub/files/CVE-2022-28735-kern-efi-sb-Reject-non-kernel-files-in-the-shim_lock.patch')
| -rw-r--r-- | meta/recipes-bsp/grub/files/CVE-2022-28735-kern-efi-sb-Reject-non-kernel-files-in-the-shim_lock.patch | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/meta/recipes-bsp/grub/files/CVE-2022-28735-kern-efi-sb-Reject-non-kernel-files-in-the-shim_lock.patch b/meta/recipes-bsp/grub/files/CVE-2022-28735-kern-efi-sb-Reject-non-kernel-files-in-the-shim_lock.patch deleted file mode 100644 index 7a59f10bfb..0000000000 --- a/meta/recipes-bsp/grub/files/CVE-2022-28735-kern-efi-sb-Reject-non-kernel-files-in-the-shim_lock.patch +++ /dev/null @@ -1,111 +0,0 @@ -From 6fe755c5c07bb386fda58306bfd19e4a1c974c53 Mon Sep 17 00:00:00 2001 -From: Julian Andres Klode <julian.klode@canonical.com> -Date: Thu, 2 Dec 2021 15:03:53 +0100 -Subject: [PATCH] kern/efi/sb: Reject non-kernel files in the shim_lock - verifier - -We must not allow other verifiers to pass things like the GRUB modules. -Instead of maintaining a blocklist, maintain an allowlist of things -that we do not care about. - -This allowlist really should be made reusable, and shared by the -lockdown verifier, but this is the minimal patch addressing -security concerns where the TPM verifier was able to mark modules -as verified (or the OpenPGP verifier for that matter), when it -should not do so on shim-powered secure boot systems. - -Fixes: CVE-2022-28735 - -Signed-off-by: Julian Andres Klode <julian.klode@canonical.com> -Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> - -Upstream-Status: Backport -CVE:CVE-2022-28735 - -Reference to upstream patch: -https://git.savannah.gnu.org/cgit/grub.git/commit/?id=6fe755c5c07bb386fda58306bfd19e4a1c974c53 - -Signed-off-by: Yongxin Liu <yongxin.liu@windriver.com> ---- - grub-core/kern/efi/sb.c | 39 ++++++++++++++++++++++++++++++++++++--- - include/grub/verify.h | 1 + - 2 files changed, 37 insertions(+), 3 deletions(-) - -diff --git a/grub-core/kern/efi/sb.c b/grub-core/kern/efi/sb.c -index c52ec6226..89c4bb3fd 100644 ---- a/grub-core/kern/efi/sb.c -+++ b/grub-core/kern/efi/sb.c -@@ -119,10 +119,11 @@ shim_lock_verifier_init (grub_file_t io __attribute__ ((unused)), - void **context __attribute__ ((unused)), - enum grub_verify_flags *flags) - { -- *flags = GRUB_VERIFY_FLAGS_SKIP_VERIFICATION; -+ *flags = GRUB_VERIFY_FLAGS_NONE; - - switch (type & GRUB_FILE_TYPE_MASK) - { -+ /* Files we check. */ - case GRUB_FILE_TYPE_LINUX_KERNEL: - case GRUB_FILE_TYPE_MULTIBOOT_KERNEL: - case GRUB_FILE_TYPE_BSD_KERNEL: -@@ -130,11 +131,43 @@ shim_lock_verifier_init (grub_file_t io __attribute__ ((unused)), - case GRUB_FILE_TYPE_PLAN9_KERNEL: - case GRUB_FILE_TYPE_EFI_CHAINLOADED_IMAGE: - *flags = GRUB_VERIFY_FLAGS_SINGLE_CHUNK; -+ return GRUB_ERR_NONE; - -- /* Fall through. */ -+ /* Files that do not affect secureboot state. */ -+ case GRUB_FILE_TYPE_NONE: -+ case GRUB_FILE_TYPE_LOOPBACK: -+ case GRUB_FILE_TYPE_LINUX_INITRD: -+ case GRUB_FILE_TYPE_OPENBSD_RAMDISK: -+ case GRUB_FILE_TYPE_XNU_RAMDISK: -+ case GRUB_FILE_TYPE_SIGNATURE: -+ case GRUB_FILE_TYPE_PUBLIC_KEY: -+ case GRUB_FILE_TYPE_PUBLIC_KEY_TRUST: -+ case GRUB_FILE_TYPE_PRINT_BLOCKLIST: -+ case GRUB_FILE_TYPE_TESTLOAD: -+ case GRUB_FILE_TYPE_GET_SIZE: -+ case GRUB_FILE_TYPE_FONT: -+ case GRUB_FILE_TYPE_ZFS_ENCRYPTION_KEY: -+ case GRUB_FILE_TYPE_CAT: -+ case GRUB_FILE_TYPE_HEXCAT: -+ case GRUB_FILE_TYPE_CMP: -+ case GRUB_FILE_TYPE_HASHLIST: -+ case GRUB_FILE_TYPE_TO_HASH: -+ case GRUB_FILE_TYPE_KEYBOARD_LAYOUT: -+ case GRUB_FILE_TYPE_PIXMAP: -+ case GRUB_FILE_TYPE_GRUB_MODULE_LIST: -+ case GRUB_FILE_TYPE_CONFIG: -+ case GRUB_FILE_TYPE_THEME: -+ case GRUB_FILE_TYPE_GETTEXT_CATALOG: -+ case GRUB_FILE_TYPE_FS_SEARCH: -+ case GRUB_FILE_TYPE_LOADENV: -+ case GRUB_FILE_TYPE_SAVEENV: -+ case GRUB_FILE_TYPE_VERIFY_SIGNATURE: -+ *flags = GRUB_VERIFY_FLAGS_SKIP_VERIFICATION; -+ return GRUB_ERR_NONE; - -+ /* Other files. */ - default: -- return GRUB_ERR_NONE; -+ return grub_error (GRUB_ERR_ACCESS_DENIED, N_("prohibited by secure boot policy")); - } - } - -diff --git a/include/grub/verify.h b/include/grub/verify.h -index cd129c398..672ae1692 100644 ---- a/include/grub/verify.h -+++ b/include/grub/verify.h -@@ -24,6 +24,7 @@ - - enum grub_verify_flags - { -+ GRUB_VERIFY_FLAGS_NONE = 0, - GRUB_VERIFY_FLAGS_SKIP_VERIFICATION = 1, - GRUB_VERIFY_FLAGS_SINGLE_CHUNK = 2, - /* Defer verification to another authority. */ --- -2.34.1 - |