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| author | Eric Snowberg <eric.snowberg@oracle.com> | 2023-07-27 00:17:25 +0300 |
|---|---|---|
| committer | Mimi Zohar <zohar@linux.ibm.com> | 2023-08-01 15:17:25 +0300 |
| commit | f20765fdfdc2c8f47b41cb08489fdad3194a8465 (patch) | |
| tree | db736627195e31a4a667ca0012db554f1aa20adb /Documentation/ABI | |
| parent | 5087fd9e80e539d2163accd045b73da64de7de95 (diff) | |
| download | linux-f20765fdfdc2c8f47b41cb08489fdad3194a8465.tar.xz | |
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 <eric.snowberg@oracle.com>
Reviewed-by: Nayna Jain <nayna@linux.ibm.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/ima_policy | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/ABI/testing/ima_policy b/Documentation/ABI/testing/ima_policy index 49db0ff288e5..c2385183826c 100644 --- a/Documentation/ABI/testing/ima_policy +++ b/Documentation/ABI/testing/ima_policy @@ -57,9 +57,9 @@ Description: stored in security.ima xattr. Requires specifying "digest_type=verity" first.) - appraise_flag:= [check_blacklist] - Currently, blacklist check is only for files signed with appended - signature. + appraise_flag:= [check_blacklist] (deprecated) + Setting the check_blacklist flag is no longer necessary. + All appraisal functions set it by default. digest_type:= verity Require fs-verity's file digest instead of the regular IMA file hash. |