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The file integrity tool must be configured to verify Access Control Lists (ACLs).


Overview

Finding ID Version Rule ID IA Controls Severity
V-72069 RHEL-07-021600 SV-86693r2_rule Low
Description
ACLs can provide permissions beyond those permitted through the file mode and must be verified by file integrity tools.
STIG Date
Red Hat Enterprise Linux 7 Security Technical Implementation Guide 2017-12-14

Details

Check Text ( C-72301r2_chk )
Verify the file integrity tool is configured to verify ACLs.

Check to see if Advanced Intrusion Detection Environment (AIDE) is installed on the system with the following command:

# yum list installed aide

If AIDE is not installed, ask the System Administrator how file integrity checks are performed on the system.

If there is no application installed to perform file integrity checks, this is a finding.

Note: AIDE is highly configurable at install time. These commands assume the "aide.conf" file is under the "/etc" directory.

Use the following command to determine if the file is in another location:

# find / -name aide.conf

Check the "aide.conf" file to determine if the "acl" rule has been added to the rule list being applied to the files and directories selection lists.

An example rule that includes the "acl" rule is below:

All= p+i+n+u+g+s+m+S+sha512+acl+xattrs+selinux
/bin All # apply the custom rule to the files in bin
/sbin All # apply the same custom rule to the files in sbin

If the "acl" rule is not being used on all 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 (F-78421r1_fix)
Configure the file integrity tool to check file and directory ACLs.

If AIDE is installed, ensure the "acl" rule is present on all file and directory selection lists.