udev does not properly set permissions on certain files in /dev/input, which allows local users to obtain sensitive data that is entered at the console, such as user passwords.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10854
http://www.securityfocus.com/bid/15994
http://www.redhat.com/support/errata/RHSA-2005-864.html