Title

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

Discussion

Extended attributes in file systems are used to contain arbitrary data and file metadata with possible security implications.

Check Content

Ask the SA if the file integrity tool is configured to monitor directories and files for xattrs settings. If using the Advanced Intrusion Detection Environment (AIDE) tool, verify the configuration file (aide.conf) contains the xattrs 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 "^xattrs = |xattrs" If the option is not present, this is a finding. If using a different file integrity tool, check the configuration per the tool vendor's documentation.

Fix Text

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

Additional Identifiers

Rule ID: SV-35190r1_rule

Vulnerability ID: V-22508

Group Title: GEN006571

Expert Comments

CCIs tied to check.

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