V-280979

Discussion

RHEL 10 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. File integrity tools use cryptographic hashes for verifying that file contents and directories have not been altered. These hashes must be FIPS 140-3-approved cryptographic hashes.

Check Content

Verify RHEL 10 AIDE is configured to use FIPS 140-3 file hashing.

Verify global default hash settings with the following command:

$ sudo grep -iE 'sha|md5|rmd' /etc/aide.conf | grep -v ^#
FIPSR = p+i+n+u+g+s+m+ftype+growing+acl+selinux+xattrs+sha512
ALLXTRAHASHES = sha512
/usr/sbin/auditctl p+i+n+u+g+s+b+acl+xattrs+sha512
/usr/sbin/auditd p+i+n+u+g+s+b+acl+xattrs+sha512
/usr/sbin/ausearch p+i+n+u+g+s+b+acl+xattrs+sha512
/usr/sbin/aureport p+i+n+u+g+s+b+acl+xattrs+sha512
/usr/sbin/augenrules p+i+n+u+g+s+b+acl+xattrs+sha512
NORMAL = FIPSR+sha512
LSPP = FIPSR+sha512
DATAONLY =  R+sha512
/etc/gshadow  NORMAL
/etc/shadow   NORMAL

If any hashes other than "sha512" are present, this is a finding.

Confirm no legacy hashes exist with the following command:

$ sudo grep -iE 'md5|sha1|whirlpool|tiger' /etc/aide.conf | grep -v ^#

If any uncommented lines are returned, this is a finding.