The IRC client irssi was updated to 0.8.20, fixing various bugs and security issues.
CVE-2016-7044: The unformat24bitcolor function in the format parsing
code in Irssi, when compiled with true-color enabled, allowed remote
attackers to cause a denial of service (heap corruption and crash)
via an incomplete 24bit color code.
CVE-2016-7045: The formatsendto_gui function in the format parsing
code in Irssi allowed remote attackers to cause a denial of service
(heap corruption and crash) via vectors involving the length of a string.
See https://irssi.org/security/irssisa2016.txt for more details.
CVE-2016-7553: A information disclosure vulnerability in irssi buf.pl
See https://irssi.org/2016/09/22/buf.pl-update/ for more information.