Skeleton files must not have extended ACLs.

From SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide

Associated with: CCI-000225

SV-45134r1_rule Skeleton files must not have extended ACLs.

Vulnerability discussion

If the skeleton files are not protected, unauthorized personnel could change user startup parameters and possibly jeopardize user files.

Check content

Check skeleton files for extended ACLs: # ls -alL /etc/skel. 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 [skeleton file with extended ACL] or: # ls -lL /etc/skel|grep "\+ "|awk ‘{print “/etc/skel/”$9}’|xargs setfacl --remove-all will remove all ACLs from the files.

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