This is expected behavior since the default action for PolicyKit is to allow you access for a few minutes after the first time you use your password. https://wiki.ubuntu.com/SecurityTeam/FAQ#Sudo
** This bug is no longer flagged as a security vulnerability -- Security leak - skipping authorization after logout https://bugs.launchpad.net/bugs/362504 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
