Evolution is the mail client of the GNOME desktop environment.
Alin Rad Pop (Secunia Research) reported two vulnerabilities in Evolution:
A remote attacker could entice a user to open a specially crafted iCalendar attachment, resulting in the execution of arbitrary code with the privileges of the user running Evolution.
There is no known workaround at this time.
All Evolution users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=mail-client/evolution-2.12.3-r2"