STIGQter: STIG Summary: SLES 12 Security Technical Implementation Guide Version: 2 Release: 3 Benchmark Date: 23 Apr 2021:

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-217293r603262_rule

Vulnerability Number

V-217293

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

SLES-12-030401

Severity

CAT II

CCI(s)

• CCI-000366 - The organization implements the security configuration settings.

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-217293

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

4033

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