The root user has the required privileges to pretty much do everything. The only way to prevent this type of malicious attack is to only install and run software from trusted repositories. I can't think of anything else that can be done.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/752649 Title: corrupt program can add line to "sudo visudo" -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
