D-Bus is a system for sending messages between applications. It is used forthe system-wide message bus service and as a per-user-login-sessionmessaging facility.A denial of service flaw was discovered in the system for sending messagesbetween applications. A local user could send a message with an excessivenumber of nested variants to the system-wide message bus, causing themessage bus (and, consequently, any process using libdbus to receivemessages) to abort. (CVE-2010-4352)All users are advised to upgrade to these updated packages, which contain abackported patch to correct this issue. For the update to take effect, allrunning instances of dbus-daemon and all running applications using thelibdbus library must be restarted, or the system rebooted.