The system must ignore ICMPv6 redirects by default.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-38548	RHEL-06-000099	SV-50349r2_rule		Medium

Description
An illicit ICMP redirect message could result in a man-in-the-middle attack.

STIG	Date
Red Hat Enterprise Linux 6 Security Technical Implementation Guide	2014-06-10

Details

Check Text ( None )
None

Fix Text (F-43496r1_fix)
To set the runtime status of the "net.ipv6.conf.default.accept_redirects" kernel parameter, run the following command: # sysctl -w net.ipv6.conf.default.accept_redirects=0 If this is not the system's default value, add the following line to "/etc/sysctl.conf": net.ipv6.conf.default.accept_redirects = 0