Compliant Product - Cisco Aggregation Services Router 1000 Series (ASR1K) and Integrated Services Router 4000 Series (ISR4K) running IOS-XE 16.9
Certificate Date: 2019.07.01CC Certificate Security Target * Validation Report
Validation Report Number: CCEVS-VR-VID10951-2019
Product Type: Virtual Private Network
Conformance Claim: Protection Profile Compliant
PP Identifier: collaborative Protection Profile for Network Devices Version 2.0 + Errata 20180314
Extended Package for VPN Gateways Version 2.1
Extended Package for MACsec Ethernet Encryption Version 1.2
CC Testing Lab: Acumen Security
* This is the Security Target (ST) associated with the latest Maintenance Release. To view previous STs for this TOE, click here.
The TOE consists of one or more physical devices and includes the Cisco IOS-XE software. The TOE has two or more network interfaces and is connected to at least one internal and one external network. The Cisco IOS-XE configuration determines how packets are handled to and from the TOE’s network interfaces. The router configuration will determine how traffic flows received on an interface will be handled. Typically, packet flows are passed through the internetworking device and forwarded to their configured destination.
The following figure provides a visual depiction of an example TOE deployment.
The previous figure includes the following:
· The following are considered to be in the IT Environment:
o VPN Peer
o MACSec Peer
o Management Workstation
o Authentication Server
o Syslog Server
o Local Console
NOTE: While the previous figure includes several non-TOE IT environment devices, the TOE is only the ASR1K/ISR4K device. Only one TOE device is required for deployment of the TOE in an evaluated configuration.
Security Evaluation Summary
The evaluation was carried out in accordance with the Common Criteria Evaluation and Validation Scheme (CCEVS) process and scheme. The criteria against which the Cisco Aggregation Services Router 1000 Series (ASR1K), Cisco Integrated Services Router 4000 Series (ISR4K) were evaluated are described in the Common Criteria for Information Technology Security Evaluation, Version 3.1 rev 4. The evaluation methodology used by the evaluation team to conduct the evaluation is the Common Methodology for Information Technology Security Evaluation, Version 3.1 rev 4. The product, when delivered configured as identified in the Cisco Aggregation Services Router 1000 Series (ASR1K) CC Configuration Guide, and the Cisco Integrated Services Router 4000 Series (ISR4K) CC Configuration Guide, satisfies all of the security functional requirements stated in the Security Target. The project underwent CCEVS Validator review. The evaluation was completed in July 2019. Results of the evaluation can be found in the Common Criteria Evaluation and Validation Scheme Validation Report prepared by CCEVS.
The TOE is comprised of several security features. Each of the security features identified above consists of several security functionalities, as identified below.
These features are described in more detail in the subsections below. In addition, the TOE implements all RFCs of the NDcPP v2.0e, VPNGWEP v2.1 and MACSECEP v1.2 as necessary to satisfy testing/assurance measures prescribed therein.
The TOE provides extensive auditing capabilities. The TOE can audit events related to cryptographic functionality, identification and authentication, and administrative actions. The TOE generates an audit record for each auditable event. Each security relevant audit event has the date, timestamp, event description, and subject identity. The administrator configures auditable events, performs back-up operations and manages audit data storage. The TOE provides the administrator with a circular audit trail or a configurable audit trail threshold to track the storage capacity of the audit trail. Audit logs are backed up over an encrypted channel to an external audit server.
The TOE provides cryptography in support of other TOE security functionality. All the algorithms claimed have CAVP certificates (Operation Environment – Intel Xeon (D, E3 and 5200) and Intel Atom C2000). The TOE leverages the IOS Common Cryptographic Module (IC2M) Rel5. In addition, the TOE supports MACsec using the Microsemi Intellisec VSC84xx/VSC85xx PHY Family and Macom/APM SafeXcel-IP-160 processors.
The TOE provides cryptography in support of VPN connections and remote administrative management via SSHv2 and IPsec to secure the transmission of audit records to the remote syslog server. In addition, IPsec is used to secure the session between the TOE and the authentication servers.
The cryptographic services provided by the TOE are described in Table 1 below.
The TOE authenticates and encrypts packets between itself and a MACsec peer. The MACsec Key Agreement (MKA) Protocol provides the required session keys and manages the required encryption keys to protect data exchanged by the peers.
The TOE performs two types of authentication: device-level authentication of the remote device (VPN peers) and user authentication for the Authorized Administrator of the TOE. Device-level authentication allows the TOE to establish a secure channel with a trusted peer. The secure channel is established only after each device authenticates the other. Device-level authentication is performed via IKE/IPsec mutual authentication. The TOE supports use of IKEv1 (ISAKMP) and IKEv2 pre-shared keys for authentication of IPsec tunnels. The IKE phase authentication for the IPsec communication channel between the TOE and authentication server and between the TOE and syslog server is considered part of the Identification and Authentication security functionality of the TOE.
The TOE provides authentication services for administrative users to connect to the TOE’s secure CLI administrator interface. The TOE requires Authorized Administrators to authenticate prior to being granted access to any of the management functionality. The TOE can be configured to require a minimum password length of 15 characters. The TOE provides administrator authentication against a local user database. Password-based authentication can be performed on the serial console or SSH interfaces. The SSHv2 interface also supports authentication using SSH keys. The TOE supports the use of a RADIUS AAA server (part of the IT Environment) for authentication of administrative users attempting to connect to the TOE’s CLI.
The TOE provides an automatic lockout when a user attempts to authenticate and enters invalid information. After a defined number of authentication attempts fail exceeding the configured allowable attempts, the user is locked out until an authorized administrator can enable the user account.
The TOE uses X.509v3 certificates as defined by RFC 5280 to support authentication for IPsec.
The TOE provides secure administrative services for management of general TOE configuration and the security functionality provided by the TOE. All TOE administration occurs either through a secure SSHv2 session or via a local console connection. The TOE provides the ability to securely manage:
· Administration of the TOE locally and remotely;
· All TOE administrative users;
· All identification and authentication;
· All audit functionality of the TOE;
· All TOE cryptographic functionality;
· The timestamps maintained by the TOE;
· Update to the TOE and verification of the updates;
· Configuration of IPsec functionality.
The TOE supports two separate administrator roles: non-privileged administrator and privileged administrator. Only the privileged administrator can perform the above security relevant management functions. Management of the TSF data is restricted to Security Administrators. The ability to enable, disable, determine and modify the behavior of all of the security functions of the TOE is restricted to authorized administrators.
Administrators can create configurable login banners to be displayed at time of login, and can also define an inactivity timeout for each admin interface to terminate sessions after a set period of inactivity.
The TOE provides packet filtering and secure IPsec tunneling. The tunnels can be established between two trusted VPN peers. More accurately, these tunnels are sets of security associations (SAs). The SAs define the protocols and algorithms to be applied to sensitive packets and specify the keying material to be used. SAs are unidirectional and are established per the ESP security protocol. An authorized administrator can define the traffic that needs to be protected via IPsec by configuring access lists (permit, deny, log) and applying these access lists to interfaces using crypto map sets.
The TOE is also capable of rejecting any MACsec PDUs in a given session that contain a SCI that is different from the one that is used to establish that session. The SCI is derived from the MACsec peer’s MAC address and port to uniquely identify the originator of the MACsec PDU. Only EAPOL (PAE EtherType 88-8E) and MACsec frames (EtherType 88-E5) are permitted in the MACsec communication between peers and others are discarded.
The TOE protects against interference and tampering by untrusted subjects by implementing identification, authentication, and access controls to limit configuration to Authorized Administrators. The TOE prevents reading of cryptographic keys and passwords. Additionally, Cisco IOS-XE is not a general-purpose operating system and access to Cisco IOS-XE memory space is restricted to only Cisco IOS-XE functions.
The TOE is also able to detect replay of information received via secure channels (MACsec). The detection applied to network packets that terminate at the TOE, such as trusted communications between the TOE and an IT entity (e.g., MACsec peer). If replay is detected, the packets are discarded.
The TOE internally maintains the date and time. This date and time is used as the timestamp that is applied to audit records generated by the TOE. Administrators can update the TOE’s clock manually. Finally, the TOE performs testing to verify correct operation of the router itself and that of the cryptographic module.
The TOE is able to verify any software updates prior to the software updates being installed on the TOE to avoid the installation of unauthorized software. Whenever a failure occurs within the TOE that results in the TOE ceasing operation, the TOE securely disables its interfaces to prevent the unintentional flow of any information to or from the TOE and reloads.
The TOE can terminate inactive sessions after an Authorized Administrator configurable time-period. Once a session has been terminated the TOE requires the user to re-authenticate to establish a new session. Sessions can also be terminated if an Authorized Administrator enters the “exit” command.
The TOE can also display a Security Administrator specified banner on the CLI management interface prior to allowing any administrative access to the TOE.
The TOE allows trusted paths to be established to itself from remote administrators over SSHv2, and initiates outbound IPsec tunnels to transmit audit messages to remote syslog servers. In addition, IPsec is used to secure the session between the TOE and the authentication servers. MACsec is also used to secure channel at Layer 2. The TOE can also establish trusted paths of peer-to-peer IPsec sessions. The peer-to-peer IPsec sessions can be used for securing the communications between the TOE and authentication server/syslog server, as well as to protect communications with a CA or remote administrative console.
Cisco Systems, Inc.