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The system must disable ICMP redirect messages.


Overview

Finding ID Version Rule ID IA Controls Severity
V-48197 SOL-11.1-050090 SV-75425r1_rule Low
Description
A malicious user can exploit the ability of the system to send ICMP redirects by continually sending packets to the system, forcing the system to respond with ICMP redirect messages, resulting in an adverse impact on the CPU performance of the system.
STIG Date
Solaris 11 SPARC Security Technical Implementation Guide 2015-06-26

Details

Check Text ( C-61949r1_chk )
Determine if ICMP redirect messages are disabled.

# ipadm show-prop -p send_redirects -co current ipv4
# ipadm show-prop -p send_redirects -co current ipv6

If the output of all commands is not "off", this is a finding.
Fix Text (F-66765r1_fix)
The Network Management profile is required.

Disable send redirects for IPv4 and IPv6.

# pfexec ipadm set-prop -p _send_redirects=off ipv4
# pfexec ipadm set-prop -p _send_redirects=off ipv6