Comment 11 for bug 1219337

Mark Smith (tntc-tig) wrote :

A somewhat sensible workaround I can find at the moment is to force re-authentication every time you type sudo. The way to do this is by adding:

Defaults timestamp_timeout=0

to the Defaults section of your /etc/sudoers

This will work on Ubuntu, OS X, and other variants.

Details can be found in

We really shouldn't be trusting the clock to being with. The fact that Ubuntu developers have seen fit to add "convenience features" to bypass security rather proves the point.