GEN001394 - The /etc/group file must not have an extended ACL.

Information

The /etc/group file is critical to system security and must be protected from unauthorized modification. The group file contains a list of system groups and associated information.

Solution

Remove the extended ACL from the /etc/group file and disable extended permissions.
#acledit /etc/group

See Also

http://iasecontent.disa.mil/stigs/zip/U_STIG_Library_2015_07.zip