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The IPv6 protocol handler must not be bound to the network stack unless needed.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-22541 | GEN007700 | SV-37606r1_rule | ECSC-1 | Medium |
| Description |
|---|
| IPv6 is the next version of the Internet protocol. Binding this protocol to the network stack increases the attack surface of the host. |
| STIG | Date |
|---|---|
| Red Hat Enterprise Linux 5 Security Technical Implementation Guide | 2015-03-12 |
Details
| Check Text ( C-36779r1_chk ) |
|---|
| If the IPv6 protocol handler is bound to the network stack, and the system does not need IPv6, this is a finding. # grep NETWORKING_IPV6 /etc/sysconfig/network If the line is set to "yes", this is a finding. |
| Fix Text (F-31643r1_fix) |
|---|
| Remove the capability to use IPv6 protocol handler. Procedure: Edit /etc/sysconfig/network and change NETWORKING_IPV6=yes to NETWORKING_IPV6=no Edit /etc/modprobe.conf and add these lines (if they are not in it): alias net-pf-10 off alias ipv6 off Stop the ipv6tables service by typing: service ip6tables stop Disable the ipv6tables service by typing: chkconfig ip6tables off Remove the ipv6 kernel module # rmmod ipv6 Reboot |