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V-22357

CAT II (Medium)

Skeleton files must not have extended ACLs.

Rule ID

SV-45134r1_rule

STIG

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

Version

V1R12

CCIs

CCI-000225

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.