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Check: GEN007880

HP-UX 11.31 STIG: GEN007880 (in versions v1 r19 through v1 r13)

Title

The system must not send IPv6 ICMP redirects. (Cat II impact)

Discussion

ICMP redirect messages are used by routers to inform hosts of a more direct route existing for a particular destination. These messages contain information from the system's route table possibly revealing portions of the network topology.

Check Content

Determine if the system is configured to not send IPv6 ICMP redirect messages. # ndd -get /dev/ip6 ip6_send_redirects If the command returns 1, this is a finding.

Fix Text

Configure the system to not send IPv6 ICMP redirect messages. # ndd -set /dev/ip6 ip6_send_redirects 0 Edit /etc/rc.config.d/nddconf: TRANSPORT_NAME[index]=ip6 NDD_NAME[index]=ip6_send_redirects NDD_VALUE[index]=0 Where: index is the next available integer value of the nddconf file. n is a number: either 1 to turn the feature ON or 0 to turn it OFF.

Additional Identifiers

Rule ID: SV-26939r1_rule

Vulnerability ID: V-22551

Group Title: GEN007880

Expert Comments

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CCIs

CCIs tied to check.

Number	Definition
CCI-001551	The organization defines approved authorizations for controlling the flow of information between interconnected systems.

Controls

Controls tied to check. These are derived from the CCIs shown above.

Number	Title
AC-4	Information Flow Enforcement