Universal Ircd Ircu any version

ircu 2.10.12.05 and earlier does not properly synchronize a kick action in certain cross scenarios, which allows remote authenticated operators to prevent later kick or de-op actions from non-local ops.

ircu 2.10.12.05 and earlier ignores timestamps in bounces, which allows remote attackers to take over a channel during a netjoin by causing a bounce while a server with an older version of the channel is linking.

ircu 2.10.12.05 and earlier allows remote attackers to discover the hidden IP address of arbitrary +x users via a series of /silence commands with (1) CIDR mask arguments or (2) certain other arguments that represent groups of IP addresses, then monitoring CTCP ping replies.