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

The SUSE operating system must not forward Internet Protocol version 6 (IPv6) source-routed packets by default.

DISA Rule

SV-237620r646823_rule

Vulnerability Number

V-237620

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

SLES-12-030362

Severity

CAT II

CCI(s)

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

Weight

10

Fix Recommendation

Configure the SUSE operating system to disable IPv6 default source routing by running the following command as an administrator:

> sudo sysctl -w net.ipv6.conf.default.accept_source_route=0

If "0" is not the system's default value, add or update the following line in "/etc/sysctl.d/99-stig.conf":

> sudo sh -c 'echo "net.ipv6.conf.default.accept_source_route=0" >> /etc/sysctl.d/99-stig.conf'

> sudo sysctl --system

Check Contents

Verify the SUSE operating system does not accept IPv6 source-routed packets by default.

Check the value of the default IPv6 accept source route variable with the following command:

> sudo sysctl net.ipv6.conf.default.accept_source_route
net.ipv6.conf.default.accept_source_route = 0

If the network parameter "ipv6.conf.default.accept_source_route" is not equal to "0" or nothing is returned, this is a finding.

Vulnerability Number

V-237620

Documentable

False

Rule Version

SLES-12-030362

Severity Override Guidance

Verify the SUSE operating system does not accept IPv6 source-routed packets by default.

Check the value of the default IPv6 accept source route variable with the following command:

> sudo sysctl net.ipv6.conf.default.accept_source_route
net.ipv6.conf.default.accept_source_route = 0

If the network parameter "ipv6.conf.default.accept_source_route" is not equal to "0" or nothing is returned, this is a finding.

Check Content Reference

M

Target Key

4033

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