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RHEL-09-651030 RHEL 9 must be configured so that the file integrity tool verifies Access Control Lists (ACLs).

DISA STIG library V2R10
All changes in this version
first version loaded CAT III

Maps to CM-6 via CCI-000366

Title

RHEL 9 must be configured so that the file integrity tool verifies Access Control Lists (ACLs).

Control

Verify that AIDE is verifying ACLs with the following command: $ sudo grep acl /etc/aide.conf All= p+i+n+u+g+s+m+S+sha512+acl+xattrs+selinux If the "acl" rule is not being used on all uncommented selection lines in the "/etc/aide.conf" file, or ACLs are not being checked by another file integrity tool, this is a finding.

Discussion

RHEL 9 installation media ships with an optional file integrity tool called Advanced Intrusion Detection Environment (AIDE). AIDE is highly configurable at install time. This requirement assumes the "aide.conf" file is under the "/etc" directory. ACLs can provide permissions beyond those permitted through the file mode and must be verified by the file integrity tools.

Related controls

CCI-000366

Fix

Configure the file integrity tool to check file and directory ACLs. If AIDE is installed, ensure the "acl" rule is present on all uncommented file and directory selection lists.