Title

The file integrity tool must be configured to verify ACLs. (Cat III impact)

Discussion

ACLs can provide permissions beyond those permitted through the file mode and must be verified by file integrity tools.

Check Content

Ask the SA if the file integrity tool is configured to monitor directories and files for ACL settings. If using the Advanced Intrusion Detection Environment (AIDE) tool, verify the configuration file (aide.conf) contains the ACL option for all monitored files and directories. See the following example. # find / -type f -name aide.conf | xargs -n1 ls -lL # cat <path>/aide.conf | tr '\011' ' ' | tr -s ' ' | sed -e 's/^[ \t]*//' |grep -v "^#" | \ egrep -i "^acl = |acl" If the option is not present, this is a finding. If using a different file integrity tool, check the configuration per tool the vendor's documentation.

Fix Text

If using AIDE, edit the configuration and add the ACL option for all monitored files and directories. If using a different file integrity tool, configure ACL checking per the tool vendor's documentation.

Additional Identifiers

Rule ID: SV-35185r1_rule

Vulnerability ID: V-22507

Group Title: GEN006570

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.