STIGQter: STIG Summary: Cisco IOS 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-220462r622190_rule

Vulnerability Number

V-220462

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 that all interfaces enabled for PIM have a neighbor access control list (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-220462

Documentable

False

Rule Version

CISC-RT-000800

Severity Override Guidance

Step 1: Verify that all interfaces enabled for PIM have a neighbor access control list (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

4065

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