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V-74125

The Cisco ISRIOS 4000XE Series router must be configured to disable non-essential capabilities.

Finding ID
CISR-RT-000015
Rule ID
SV-88799r1_rule88799r3_rule
Severity
Cat II
CCE
(None)
Group Title
SRG-NET-000131-RTR-000035
CCI
CCI-000381
Target Key
(None)
Documentable
No
Discussion

A compromised router introduces risk to the entire network infrastructure as well as data resources that are accessible via the network. The perimeter defense has no oversight or control of attacks by malicious users within the network. Preventing network breaches from within is dependent on implementing a comprehensive defense-in-depth strategy including securing each device connected to the network. This is accomplished by following and implementing all security guidance applicable for each node type. A fundamental step in securing each router is to enable only the capabilities required for operation.

Fix Text

Disable all unnecessary or non-secure ports, protocols and services. Ifno anyip ofbootp theserver followingno commandsip aredns inserver theno configuration,ip removefinger them.no ip http server no ip identd no ip rcmd rcp-enable no ip rcmd rsh-enable no service config no service udp-small-servers no service tcp-small-servers no service finger no service pad ipline dnsvty server0 ip4 identdno iptransport fingerinput ipno http-servertransport ipoutput rcmdtransport rcp-enableinput ipssh rcmdtransport rsh-enableoutput ipssh bootpNote: servertransport input and output for telnet service configcan’t be disabled individually; hence, ssh must be reinserted for access to the line vty configuration.

Check Content

Verify that the Cisco ISRIOS 4000XE Series router does not have any unnecessary or non-secure ports, protocols and services enabled. For example, the following commands should not be in the configuration: ip bootp server ip identddns server ip finger ip http- server ip identd ip rcmd rcp-enable ip rcmd rsh-enable service config service finger service tcp-small-servers service udp-small-servers service pad transport input telnet transport output telnet If any unnecessary or non-secure ports, protocols or services are enabled, this is a finding.