The GTK version of ettercap uses a global settings file at /tmp/.ettercap_gtk and does not verify ownership of this file. When parsing this file for settings in gtkui_conf_read() (src/interfacesgtk/ec_gtk_conf.c), an unchecked sscanf() call allows a maliciously placed settings file to overflow a statically-sized buffer on the stack.

An unchecked sscanf() call in ettercap before 0.7.5 allows an insecure temporary settings file to overflow a static-sized buffer on the stack.

Stack-based buffer overflow in the scan_load_hosts function in ec_scan.c in Ettercap 0.7.5.1 and earlier might allow local users to gain privileges via a Trojan horse hosts list containing a long line.