Unspecified vulnerability in the match_rule_equal function in bus/signals.c in D-Bus before 1.0.2 allows local applications to remove match rules for other applications and cause a denial of service (lost process messages).
D-BUS (dbus) before 0.22 does not properly restrict access to a socket, if the socket address is known, which allows local users to listen or send arbitrary messages on another user's per-user session bus via that socket.