STIGQter: STIG Summary: Cisco IOS Router RTR Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 23 Oct 2020:

The Cisco router must be configured to implement message authentication for all control plane protocols.

DISA Rule

SV-216986r538969_rule

Vulnerability Number

V-216986

Group Title

SRG-NET-000230-RTR-000001

Rule Version

CISC-RT-000020

Severity

CAT II

CCI(s)

• CCI-000366 - The organization implements the security configuration settings.
• CCI-002205 - The information system uniquely identifies and authenticates source by organization, system, application, and/or individual for information transfer.

Weight

10

Fix Recommendation

Configure authentication to be enabled for every protocol that affects the routing or forwarding tables.

The example configuration commands below enables BGP, EIGRP, IS-IS, and OSPF authentication.

BGP Example

R1(config)#router bgp nn
R1(config-router)#neighbor x.x.x.x password xxxxxx

EIGRP Example

R5(config)#key chain EIGRP_KEY
R5(config-keychain)#key 1
R5(config-keychain-key)#key-string xxxxx
R5(config-keychain-key)#exit
R5(config-keychain)#exit
R5(config)#int g0/0
R5(config-if)#ip authentication mode eigrp 1 md5
R5(config-if)#ip authentication key-chain eigrp 1 EIGRP_KEY
R5(config-if)#end

IS-IS Example

R5(config)#int g0/0
R5(config-if)#isis password xxxxxx

OSPF Example

R5(config)#int g0/0
R5(config-if)#ip ospf authentication-key xxxxx
R5(config-if)#end

Check Contents

Review the router configuration. Verify that neighbor router authentication is enabled for all routing protocols. The configuration examples below depicts OSPF, EIGRP, IS-IS and BGP authentication.

BGP Example

router bgp nn
no synchronization
bgp log-neighbor-changes
neighbor x.x.x.x remote-as nn
neighbor x.x.x.x password xxxxxxx

EIGRP Example

key chain EIGRP_KEY
key 1
key-string xxxxxxx
…
…
…
interface GigabitEthernet0/0
ip address x.x.x.x 255.255.255.0
ip authentication mode eigrp 1 md5
ip authentication key-chain eigrp 1 EIGRP_KEY

IS-IS Example

interface GigabitEthernet0/0
ip address x.x.x.x 255.255.255.0
ip router isis
isis password xxxxxxx

OSPF Example

interface GigabitEthernet0/0
ip address x.x.x.x 255.255.255.0
ip ospf authentication-key xxxxx

If authentication is not enabled on all routing protocols, this is a finding.

Vulnerability Number

V-216986

Documentable

False

Rule Version

CISC-RT-000020

Severity Override Guidance

Review the router configuration. Verify that neighbor router authentication is enabled for all routing protocols. The configuration examples below depicts OSPF, EIGRP, IS-IS and BGP authentication.

BGP Example

router bgp nn
no synchronization
bgp log-neighbor-changes
neighbor x.x.x.x remote-as nn
neighbor x.x.x.x password xxxxxxx

EIGRP Example

key chain EIGRP_KEY
key 1
key-string xxxxxxx
…
…
…
interface GigabitEthernet0/0
ip address x.x.x.x 255.255.255.0
ip authentication mode eigrp 1 md5
ip authentication key-chain eigrp 1 EIGRP_KEY

IS-IS Example

interface GigabitEthernet0/0
ip address x.x.x.x 255.255.255.0
ip router isis
isis password xxxxxxx

OSPF Example

interface GigabitEthernet0/0
ip address x.x.x.x 255.255.255.0
ip ospf authentication-key xxxxx

If authentication is not enabled on all routing protocols, this is a finding.

Check Content Reference

M

Target Key

4027

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