rust-sudo-rs vulnerabilities

It was discovered that sudo-rs incorrectly handled passwords when timeouts
occurred and the pwfeedback default was not set. This could result in a
partially typed password being output to standard input, contrary to
expectations.

It was discovered that sudo-rs incorrectly handled the targetpw and rootpw
default settings when creating timestamp files. A local attacker could
possibly use this issue to bypass authentication in certain configurations.