The KDE Display Manager (KDM) can be exploited to allow users to log in without a password. This would give users the ability to log in as other users or even root.
The threat affects password-protected accounts in specific conditions; for example if auto-login is configured and the function "shutdown with password" is enabled. The vulnerability which as been assigned the CVE ID 2007-4569 was disclosed on the KDE Announce mailing list.
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