Adicione-os a /etc/apt/sources.list
:
deb http://http.kali.org/kali kali main non-free contrib
deb http://security.kali.org/kali-security kali/updates main contrib non-free
deb-src http://http.kali.org/kali kali main non-free contrib
deb-src http://security.kali.org/kali-security kali/updates main contrib non-free
Espero que você tenha percebido o percentual extra space
& ' /
' & o nome que falta na sua lista de fontes.