The dissector_cvs function in dissectors/ec_cvs.c in Ettercap 0.8.1 allows remote attackers to cause a denial of service (out-of-bounds read) via a packet containing only a CVS_LOGIN signature.
https://www.obrela.com/home/security-labs/advisories/osi-advisory-osi-1402/
https://security.gentoo.org/glsa/201505-01
https://github.com/Ettercap/ettercap/pull/608
http://www.securityfocus.com/bid/71691
http://www.securityfocus.com/archive/1/534248/100/0/threaded