Check: AMLS-L3-000210
Arista MLS DCS-7000 Series RTR STIG:
AMLS-L3-000210
(in versions v1 r3 through v1 r2)
Title
The Arista Multilayer Switch must enforce information flow control using explicit security attributes (for example, IP addresses, port numbers, protocol, Autonomous System, or interface) on information, source, and destination objects. (Cat II impact)
Discussion
Information flow control regulates where information is allowed to travel within a network and between interconnected networks. The flow of all network traffic must be monitored and controlled so it does not introduce any unacceptable risk to the network infrastructure or data. Restrictions can be enforced based on source and destination IP addresses as well as the ports and services being requested. This requirement should enforce the deny-by-default policy whereby only the known and accepted traffic will be allowed outbound and inbound.
Check Content
If explicit security attributes (for example, IP addresses, port numbers, protocol, Autonomous System, or interface) are not used to enforce information flow control, this is a finding. Review the configuration of any access control list on the switch to determine if explicit attributes are being utilized. The ACL must include explicit attributes such as ip addresses, port numbers, protocols, etc. Note that the Arista MLS includes a deny-by-default statement that is not displayed in the CLI. This statement exists at the end of every ACL.
Fix Text
Configure the router to enforce flow control using explicit security attributes (for example, IP addresses, port numbers, protocol, Autonomous System, or interface) on information, source, and destination objects as a basis for flow control decisions. To enforce flow control using explicit security attributes, configure access control lists as per organization-defined requirements, to include statements such as: ip access-list [Name} deny [protocol] [source address] [source port] [destination address] [destination port] [dscp filter] [ttl filter]
Additional Identifiers
Rule ID: SV-75369r2_rule
Vulnerability ID: V-60911
Group Title: SRG-NET-000018-RTR-000001
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-000366 |
The organization implements the security configuration settings. |
CCI-002190 |
The information system uses organization-defined security attributes associated with organization-defined information, source, and destination objects to enforce organization-defined information flow control policies as a basis for flow control decisions. |