Design/Logic Flaw

backend/session.c in KDM in KDE 3.3.0 through 3.5.7, when autologin is configured and "shutdown with password" is enabled, allows remote attackers to bypass the password requirement and login to arbitrary accounts via unspecified vectors...

kdm -- passwordless login vulnerability

The KDE development team reports: KDM can be tricked into performing a password-less login even for accounts with a password set under certain circumstances, namely autologin to be configured and "shutdown with password" enabled...