Dia is a GTK+ based diagram creation program.
infamous41md discovered multiple buffer overflows in Dia's XFig file import plugin.
By enticing a user to import a specially crafted XFig file into Dia, an attacker could exploit this issue to execute arbitrary code with the rights of the user running Dia.
There is no known workaround at this time.
All Dia users should upgrade to the latest available version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-office/dia-0.94-r5"