STIGQter STIGQter: STIG Summary: SLES 12 Security Technical Implementation Guide Version: 1 Release: 4 Benchmark Date: 24 Jan 2020: The SUSE operating system must not allow interfaces to accept Internet Protocol version 6 (IPv6) Internet Control Message Protocol (ICMP) redirect messages by default.

DISA Rule

SV-96519r1_rule

Vulnerability Number

V-81805

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

SLES-12-030401

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Configure the SUSE operating system to not allow IPv6 ICMP redirect messages by default.

Set the system to the required kernel parameter by adding the following line to "/etc/sysctl.conf" (or modify the line to have the required value):

net.ipv6.conf.default.accept_redirects=0

Run the following command to apply this value:

# sysctl –system

Check Contents

Verify the SUSE operating system does not allow IPv6 ICMP redirect messages by default.

Check the value of the "default accept_redirects" variables with the following command:

# sudo sysctl net.ipv6.conf.default.accept_redirects
net.ipv6.conf.default.accept_redirects = 0

If the returned line does not have a value of "0", this is a finding.

Vulnerability Number

V-81805

Documentable

False

Rule Version

SLES-12-030401

Severity Override Guidance

Verify the SUSE operating system does not allow IPv6 ICMP redirect messages by default.

Check the value of the "default accept_redirects" variables with the following command:

# sudo sysctl net.ipv6.conf.default.accept_redirects
net.ipv6.conf.default.accept_redirects = 0

If the returned line does not have a value of "0", this is a finding.

Check Content Reference

M

Target Key

2903

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