diff options
| author | Eric Snowberg <[email protected]> | 2023-07-26 17:17:25 -0400 |
|---|---|---|
| committer | Mimi Zohar <[email protected]> | 2023-08-01 08:17:25 -0400 |
| commit | f20765fdfdc2c8f47b41cb08489fdad3194a8465 (patch) | |
| tree | db736627195e31a4a667ca0012db554f1aa20adb /arch/powerpc/kernel/ima_arch.c | |
| parent | 5087fd9e80e539d2163accd045b73da64de7de95 (diff) | |
integrity: Always reference the blacklist keyring with appraisal
Commit 273df864cf746 ("ima: Check against blacklisted hashes for files with
modsig") introduced an appraise_flag option for referencing the blacklist
keyring. Any matching binary found on this keyring fails signature
validation. This flag only works with module appended signatures.
An important part of a PKI infrastructure is to have the ability to do
revocation at a later time should a vulnerability be found. Expand the
revocation flag usage to all appraisal functions. The flag is now
enabled by default. Setting the flag with an IMA policy has been
deprecated. Without a revocation capability like this in place, only
authenticity can be maintained. With this change, integrity can now be
achieved with digital signature based IMA appraisal.
Signed-off-by: Eric Snowberg <[email protected]>
Reviewed-by: Nayna Jain <[email protected]>
Signed-off-by: Mimi Zohar <[email protected]>
Diffstat (limited to 'arch/powerpc/kernel/ima_arch.c')
| -rw-r--r-- | arch/powerpc/kernel/ima_arch.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/ima_arch.c b/arch/powerpc/kernel/ima_arch.c index 957abd592075..b7029beed847 100644 --- a/arch/powerpc/kernel/ima_arch.c +++ b/arch/powerpc/kernel/ima_arch.c @@ -23,9 +23,9 @@ bool arch_ima_get_secureboot(void) * is not enabled. */ static const char *const secure_rules[] = { - "appraise func=KEXEC_KERNEL_CHECK appraise_flag=check_blacklist appraise_type=imasig|modsig", + "appraise func=KEXEC_KERNEL_CHECK appraise_type=imasig|modsig", #ifndef CONFIG_MODULE_SIG - "appraise func=MODULE_CHECK appraise_flag=check_blacklist appraise_type=imasig|modsig", + "appraise func=MODULE_CHECK appraise_type=imasig|modsig", #endif NULL }; @@ -49,9 +49,9 @@ static const char *const trusted_rules[] = { static const char *const secure_and_trusted_rules[] = { "measure func=KEXEC_KERNEL_CHECK template=ima-modsig", "measure func=MODULE_CHECK template=ima-modsig", - "appraise func=KEXEC_KERNEL_CHECK appraise_flag=check_blacklist appraise_type=imasig|modsig", + "appraise func=KEXEC_KERNEL_CHECK appraise_type=imasig|modsig", #ifndef CONFIG_MODULE_SIG - "appraise func=MODULE_CHECK appraise_flag=check_blacklist appraise_type=imasig|modsig", + "appraise func=MODULE_CHECK appraise_type=imasig|modsig", #endif NULL }; |