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V-282743

CAT III (Low)

TOSS 5 must be configured so that the file integrity tool verifies Access Control Lists (ACLs).

Rule ID

SV-282743r1201209_rule

STIG

Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-000366

Discussion

TOSS 5 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.

Check Content

Confirm AIDE is verifying ACLs using the following command:

$ 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.

Fix Text

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.