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The system must ignore ICMP redirect messages.


Overview

Finding ID Version Rule ID IA Controls Severity
V-216374 SOL-11.1-050070 SV-216374r603267_rule Low
Description
Ignoring ICMP redirect messages reduces the likelihood of denial of service attacks.
STIG Date
Solaris 11 SPARC Security Technical Implementation Guide 2023-05-17

Details

Check Text ( C-17610r371210_chk )
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 (F-17608r371211_fix)
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