The services file must not have an extended ACL.

From Oracle Linux 5 Security Technical Implementation Guide

Associated with: CCI-000225

SV-63985r1_rule The services file must not have an extended ACL.

Vulnerability 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. If the file has an extended ACL and it has not been documented with the IAO, this is a finding.

Fix text

Remove the extended ACL from the file. # setfacl --remove-all /etc/services

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