ansible/roles/basesecurity/tasks/main.yml

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---
- name: Configure sysctl
template:
src: 'sysctl.d/local.conf.j2'
dest: '/etc/sysctl.d/local.conf'
mode: 0644
# Use this command to list setuid or setgid executables
# find / -type f -perm /6000 -ls 2>/dev/null
- name: Desactivate setuid/setgid on unused binaries
file:
path: "{{ item }}"
mode: u-s,g-s
loop:
- /usr/lib/openssh/sshkeysign # Not used
- /usr/bin/gpasswd # No group auth
- /usr/bin/passwd # Only root should change passwd
- /usr/bin/expiry # With re2o
- /usr/bin/newgrp # No group auth
- /usr/bin/chage # With re2o
- /usr/bin/chsh # With re2o
- /usr/bin/chfn # With re2o
- /bin/mount # Only root should mount
- /bin/umount # Only root should umount
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ignore_errors: true # Sometimes file won't exist