STIGQter: STIG Summary: Dell OS10 Switch Layer 2 Switch Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 10 Dec 2024:

The Dell OS10 Switch must have DHCP snooping for all user VLANs to validate DHCP messages from untrusted sources.

DISA Rule

SV-269959r1052263_rule

Vulnerability Number

V-269959

Group Title

SRG-NET-000362-L2S-000025

Rule Version

OS10-L2S-000130

Severity

CAT II

CCI(s)

• CCI-002385 - Protect against or limit the effects of organization-defined types of denial of service events.

Weight

10

Fix Recommendation

Configure the Dell OS10 Switch to have DHCP snooping for all user VLANs to validate DHCP messages from untrusted sources, as shown in the example below:

Enable DHCP snooping globally in CONFIGURATION mode:

OS10(config)# ip dhcp snooping

Specify physical or LAG interfaces that have connections towards DHCP servers as trusted in INTERFACE mode:

OS10(config)# interface ethernet 1/1/4
OS10(conf-if-eth1/1/1)# ip dhcp snooping trust

Alternatively, add static DHCP snooping entry in the binding table:

OS10(config)# ip dhcp snooping binding mac 00:04:96:70:8a:12 vlan 100 ip 100.1.1.2 interface ethernet 1/1/1

Check Contents

Review the Dell OS10 Switch configuration and verify that DHCP snooping is enabled on all user VLANs.

Verify that DHCP snooping is enabled globally:

ip dhcp snooping

Verify that interfaces attached to trusted DHCP servers are configured:

interface ethernet 1/1/4
ip dhcp snooping trust

Verify that static DHCP snooping entries are in the binding table:

ip dhcp snooping binding mac 00:04:96:70:8a:12 vlan 100 ip 100.1.1.2 interface ethernet 1/1/1

Note that OS10 supports three types of source address validation of trusted DHCP servers: source IP address validation, source IP and MAC address validation, and DHCP source MAC address validation.

If the switch does not have DHCP snooping enabled for all user VLANs to validate DHCP messages from untrusted sources, this is a finding.

Vulnerability Number

V-269959

Documentable

False

Rule Version

OS10-L2S-000130

Severity Override Guidance

Review the Dell OS10 Switch configuration and verify that DHCP snooping is enabled on all user VLANs.

Verify that DHCP snooping is enabled globally:

ip dhcp snooping

Verify that interfaces attached to trusted DHCP servers are configured:

interface ethernet 1/1/4
ip dhcp snooping trust

Verify that static DHCP snooping entries are in the binding table:

ip dhcp snooping binding mac 00:04:96:70:8a:12 vlan 100 ip 100.1.1.2 interface ethernet 1/1/1

Note that OS10 supports three types of source address validation of trusted DHCP servers: source IP address validation, source IP and MAC address validation, and DHCP source MAC address validation.

If the switch does not have DHCP snooping enabled for all user VLANs to validate DHCP messages from untrusted sources, this is a finding.

Check Content Reference

M

Target Key

5667