IBM AIX
TMA-AIX-4.3.2.2
Ensure dhcp client services are not in use
Descrição
The dhcpcd and dhcpcd6 daemons receive address and configuration information from the DHCP server for IPv4 and IPv6 respectively. Unless a system is specifically expected to receive IP address and configuration via DHCP, it is recommended that the dhcp client fileset be removed to reduce the potential attack surface. Audit: the dhcpcd start line in /etc/rc.tcpip must be commented out and the dhcpcd subsystem must not be active.
Como é verificado
Método de auditoria: Comando shell
command -v lssrc >/dev/null 2>&1 || exit 1; [ -r /etc/rc.tcpip ] || exit 1; out=$( { grep -E "^[[:blank:]]*start[[:blank:]]+/usr/(sbin|lib)/dhcpcd([[:blank:]]|$)" /etc/rc.tcpip; lssrc -s dhcpcd | awk 'NR>1 && $NF=="active"' ; } 2>/dev/null ); [ -z "$out" ] && echo compliant || printf '%s\n' "$out" | head -n 20- Saída esperada
compliant
Como é corrigido
Método de correção: Orientação ou patch de infraestrutura
Run the following command to remove the software: # /usr/sbin/installp -u bos.net.tcp.dhcp bos.net.tcp.client - OR - - IF - the bos.net.tcp.dhcp fileset is required as a dependency: Run the following script to stop and disable dhcpcd and dhcpcd6 #!/usr/bin/ksh DAEMONS="dhcpcd dhcpcd6" for l_daemon in $DAEMONS; do /usr/sbin/chrctcp -d $l_daemon /usr/bin/stopsrc -s $l_daemon done
Propriedades
- Sistemas operacionais
- Qualquer
- Tags
- aixnetwork
- Referência
- CIS IBM AIX 7 Benchmark v1.2.0 - 4.3.2.2 Ensure dhcp client services are not in use
Verificar este host
Execute isto em uma máquina que você tenha permissão para auditar. A varredura é somente leitura.
tmaegis scan --target aix