Detections
Analytics

1.439 OL09-00-006041

Information

OL 9 must ignore IPv6 Internet Control Message Protocol (ICMP) redirect messages.

GROUP ID: V-271878
RULE ID: SV-271878r1092346

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

Solution

Configure OL 9 to ignore IPv6 ICMP redirect messages.

Add or edit the following line in a single system configuration file in the "/etc/sysctl.d/" directory:

net.ipv6.conf.all.accept_redirects = 0

Load settings from all system configuration files with the following command:

$ sudo sysctl --system

See Also

https://workbench.cisecurity.org/benchmarks/27024

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6b., CCI|CCI-000366, Rule-ID|SV-271878r1092346_rule, STIG-ID|OL09-00-006041, Vuln-ID|V-271878

Plugin: Unix

Control ID: 5f97f068430ba168ae82ec68f2279ea89ecbc8463dc14a7f034d7826cb876d37