Title

The services file must not have an extended ACL. (Cat II impact)

Discussion

The services file is critical to the proper operation of network services and must be protected from unauthorized modification. If the services file has an extended ACL, it may be possible for unauthorized users to modify the file. Unauthorized modification could result in the failure of network services.

Check Content

Check the permissions of the /etc/services file. # ls -lL /etc/services If the permissions include a "+", the file has an extended ACL, this is a finding.

Fix Text

Remove the extended ACL from the file. # chmod A- /etc/services

Additional Identifiers

Rule ID: SV-227819r603266_rule

Vulnerability ID: V-227819

Group Title: SRG-OS-000480

Expert Comments

CCIs tied to check.

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