STIGQter: STIG Summary: Cisco IOS-XE Switch RTR Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 23 Apr 2021:

The Cisco multicast switch must be configured to bind a Protocol Independent Multicast (PIM) neighbor filter to interfaces that have PIM enabled.

DISA Rule

SV-221054r622190_rule

Vulnerability Number

V-221054

Group Title

SRG-NET-000019-RTR-000004

Rule Version

CISC-RT-000800

Severity

CAT II

CCI(s)

• CCI-001414 - The information system enforces approved authorizations for controlling the flow of information between interconnected systems based on organization-defined information flow control policies.

Weight

10

Fix Recommendation

Configure neighbor ACLs to only accept PIM control plane traffic from documented PIM neighbors. Bind neighbor ACLs to all PIM enabled interfaces.

Step 1: Configure ACL for PIM neighbors.

SW2(config)#ip access-list standard PIM_NEIGHBORS
SW2(config-std-nacl)#permit 10.1.2.6
SW2(config-std-nacl)#exit

Step 2: Apply the ACL to all interfaces enabled for PIM.

SW2(config)#int g1/1
SW2(config-if)#ip pim neighbor-filter PIM_NEIGHBORS

Check Contents

Step 1: Verify all interfaces enabled for PIM have a neighbor ACL bound to the interface as shown in the example below:

interface GigabitEthernet1/1
no switchport
ip address 10.1.2.2 255.255.255.0
ip pim neighbor-filter PIM_NEIGHBORS
ip pim sparse-mode

Step 2: Review the configured ACL for filtering PIM neighbors as shown in the example below:

ip access-list standard PIM_NEIGHBORS
permit 10.1.2.6

If PIM neighbor ACLs are not bound to all interfaces that have PIM enabled, this is a finding.

Vulnerability Number

V-221054

Documentable

False

Rule Version

CISC-RT-000800

Severity Override Guidance

Step 1: Verify all interfaces enabled for PIM have a neighbor ACL bound to the interface as shown in the example below:

interface GigabitEthernet1/1
no switchport
ip address 10.1.2.2 255.255.255.0
ip pim neighbor-filter PIM_NEIGHBORS
ip pim sparse-mode

Step 2: Review the configured ACL for filtering PIM neighbors as shown in the example below:

ip access-list standard PIM_NEIGHBORS
permit 10.1.2.6

If PIM neighbor ACLs are not bound to all interfaces that have PIM enabled, this is a finding.

Check Content Reference

M

Target Key

4074

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