hy, there is an remote root vulnerability in Exim prior 4.70. Please see: http://www.exim.org/lurker/message/20101207.215955.bb32d4f2.en.html and http://www.exim.org/lurker/message/20101210.083335.f3d05cab.en.html
*** This bug has been marked as a duplicate of bug 661756 ***