I'm constantly having trouble discovering what #debian's #security story is supposed to be.
They claim updates keep secure, except #backports doesn't give any guarantees for security. But then you have package 'tor": updates provide old version with risks, while backports provide up-to-date version.
#AppArmor is provided but most profiles aren't up-to-date so enforcing is risky. Ubuntu restricts unprivileged-unconfined apps to prevent unnecessarily exposing some vulnerabilities. Debian doesn't