project-lakitu: Remove read/write/execute permissions of group and other user accounts
for systemd timer files

CIS recommends removing rwx permissions of cron files. COS uses systemd timer
instead of cron. Therefore, applied similar logic to systemd timer files.

CIS Benchmark: https://drive.google.com/file/d/1mUduhcHfZk-DwQmzgUmOfoNPtdbzHNSg/view?usp=sharing

BUG=b/177855944
TEST=presubmit
RELEASE_NOTE=Remove read/write/execute permissions of group and other user accounts
for systemd timer files

Change-Id: I5438fd8f84c85606e97c47478f18fca98faa32aa
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/10760
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Roy Yang <royyang@google.com>
1 file changed