Title

The Juniper router must be configured to be configured to prohibit the use of all unnecessary and nonsecure functions and services. (Cat I impact)

Discussion

Network devices are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., email and web services); however, doing so increases risk over limiting the services provided by any one component. To support the requirements and principles of least functionality, the network device must support the organizational requirements providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved. Some network devices have capabilities enabled by default; if these capabilities are not necessary, they must be disabled. If a particular capability is used, then it must be documented and approved.

Check Content

Review the services that have been enabled as shown in the following configuration example: services { finger; telnet; xnm-clear-text; netconf { ssh; } } Services such as finger, telnet, and clear text-based JUNOScript connections should never be enabled. Other services such as Netconf, FTP, DHCP, and SSL-based JUNOScript connections should only be enabled if operationally required. If the router is not configured to prohibit the use of all unnecessary and non-secure functions and services, this is a finding.

Fix Text

Disable the following services if enabled as shown in the example below. [edit system services] delete telnet delete finger delete xnm-clear-text

Additional Identifiers

Rule ID: SV-217320r879588_rule

Vulnerability ID: V-217320

Group Title: SRG-APP-000142-NDM-000245

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.