For the record, local users have always been able to reboot the computer through the indicator (which then invoked logind or ConsoleKit to do the actual reboot), or even just by hitting the power button. So this isn't a new capability at all.
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1440040 Title: reboot command is executable by anybody Status in systemd package in Ubuntu: Invalid Bug description: 1) Description: Ubuntu Vivid Vervet (development branch) Release: 15.04 2) systemd: Installed: 219-6ubuntu1 Candidate: 219-6ubuntu1 Version table: *** 219-6ubuntu1 0 500 http://archive.ubuntu.com/ubuntu/ vivid/main amd64 Packages 100 /var/lib/dpkg/status 3) The `reboot` command does not need to be executable by anybody. 4) It is. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: systemd-sysv 219-6ubuntu1 ProcVersionSignature: Ubuntu 3.19.0-10.10-generic 3.19.2 Uname: Linux 3.19.0-10-generic x86_64 ApportVersion: 2.17-0ubuntu1 Architecture: amd64 CurrentDesktop: Unity Date: Fri Apr 3 14:51:30 2015 InstallationDate: Installed on 2015-02-02 (59 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1) SourcePackage: systemd UpgradeStatus: Upgraded to vivid on 2015-03-11 (22 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1440040/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp

