The system must ignore ICMP redirect messages.

From Solaris 11 X86 Security Technical Implementation Guide

Part of SRG-OS-999999

Associated with: CCI-000366

SV-61061r1_rule The system must ignore ICMP redirect messages.

Vulnerability discussion

Ignoring ICMP redirect messages reduces the likelihood of denial of service attacks.

Check content

Determine if ICMP redirect messages are ignored. # ipadm show-prop -p _ignore_redirect -co current ipv4 # ipadm show-prop -p _ignore_redirect -co current ipv6 If the output of all commands is not "1", this is a finding.

Fix text

The Network Management profile is required. Disable ignore redirects for IPv4 and IPv6. # pfexec ipadm set-prop -p _ignore_redirect=1 ipv4 # pfexec ipadm set-prop -p _ignore_redirect=1 ipv6

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