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

The Cisco router must be configured to produce audit records containing information to establish the source of the events.

DISA Rule

SV-216751r531087_rule

Vulnerability Number

V-216751

Group Title

SRG-NET-000077-RTR-000001

Rule Version

CISC-RT-000220

Severity

CAT II

CCI(s)

• CCI-000133 - The information system generates audit records containing information that establishes the source of the event.

Weight

10

Fix Recommendation

Configure the router to log events containing information to establish where the events occurred as shown in the example below.

RP/0/0/CPU0:R3(config)#ipv4 access-list EXTERNAL_ACL_INBOUND
…
…
…
RP/0/0/CPU0:R3(config-ipv4-acl)#deny ip any any log-input

Check Contents

Review the router configuration to verify that events are logged containing information to establish the source of the events as shown in the example below.

ipv4 access-list EXTERNAL_ACL_INBOUND
10 permit tcp host x.11.1.1 eq bgp host x.11.1.2
20 permit tcp host x.11.1.1 host x.11.1.2 eq bgp
25 deny icmp any host x.11.1.2 fragments log
30 permit icmp host x.11.1.1 host x.11.1.2 echo
40 permit icmp host x.11.1.1 host x.11.1.2 echo-reply
50 deny ipv4 any host x.11.1.1 log-input
60 permit tcp any any established
…
…
…
140 deny ipv4 any any log-input

Note: When the log-input parameter is configured on deny statements, the log record will contain the layer 2 address of the forwarding device for any packet being dropped.

If the router is not configured to produce audit records containing information to establish the source of the events, this is a finding.

Vulnerability Number

V-216751

Documentable

False

Rule Version

CISC-RT-000220

Severity Override Guidance

Review the router configuration to verify that events are logged containing information to establish the source of the events as shown in the example below.

ipv4 access-list EXTERNAL_ACL_INBOUND
10 permit tcp host x.11.1.1 eq bgp host x.11.1.2
20 permit tcp host x.11.1.1 host x.11.1.2 eq bgp
25 deny icmp any host x.11.1.2 fragments log
30 permit icmp host x.11.1.1 host x.11.1.2 echo
40 permit icmp host x.11.1.1 host x.11.1.2 echo-reply
50 deny ipv4 any host x.11.1.1 log-input
60 permit tcp any any established
…
…
…
140 deny ipv4 any any log-input

Note: When the log-input parameter is configured on deny statements, the log record will contain the layer 2 address of the forwarding device for any packet being dropped.

If the router is not configured to produce audit records containing information to establish the source of the events, this is a finding.

Check Content Reference

M

Target Key

4029

Comments