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Compliant Product - Cisco Catalyst 3650 and 3850 Series Switches

Certificate Date:  2017.11.27

Validation Report Number:  CCEVS-VR-VID10819-2017

Product Type:    Network Device

Conformance Claim:  Protection Profile Compliant

PP Identifier:    collaborative Protection Profile for Network Devices Version 1.0
  Extended Package for MACsec Ethernet Encryption Version 1.2

CC Testing Lab:  Acumen Security

CC Certificate [PDF] Security Target [PDF] Validation Report [PDF]

Assurance Activity [PDF]

Administrative Guide [PDF]

Product Description

The Cisco Catalyst Switches 3650 Series and 3850 Series running IOS-XE 16.3 (herein after referred to as Cat3K Series). The TOE is a purpose-built, switching and routing platform with OSI Layer2 and Layer3 traffic filtering capabilities. The TOE includes the hardware models as defined in Table 3 in Section 1.1.

Cisco IOS software is a Cisco-developed highly configurable proprietary operating system that provides for efficient and effective switching and routing. Although IOS performs many networking functions, this Security Target only addresses the functions that provide for the security of the TOE itself as described in Section 1.7 TOE logical scope below.

Evaluated Configuration

The TOE consists of one or more physical devices as specified in section 1.5 below and includes the Cisco IOS software. The TOE has two or more network interfaces and is connected to at least one internal and one external network. The Cisco IOS configuration determines how packets are handled to and from the TOE’s network interfaces. The switch configuration will determine how traffic flows received on an interface will be handled. Typically, packet flows are passed through the internet working device and forwarded to their configured destination.

The TOE can optionally connect to an NTP server on its internal network for time services. Also, if the Catalyst 3650 and 3850 Series Switches is to be remotely administered, then the management workstation must be connected to an internal network, SSHv2 is used to securely connect to the switch. A syslog server is used to store audit records, where IPsec is used to secure the transmission of the records. If these servers are used, they must be attached to the internal (trusted) network. The internal (trusted) network is meant to be separated effectively from unauthorized individuals and user traffic, one that is in a controlled environment where implementation of security policies can be enforced.

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 Catalyst 3650 and 3850 Series Switches was 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.  Acumen Security determined that the evaluation assurance level (EAL) for the product is EAL 1.  The product, when delivered configured as identified in the AGD, satisfies all of the security functional requirements stated in the Security Target. The project underwent CCEVS Validator review.  The evaluation was completed in October 2017.  Results of the evaluation can be found in the Common Criteria Evaluation and Validation Scheme Validation Report prepared by CCEVS.

Environmental Strengths

Security Audit

The Cisco Cat3k provides extensive auditing capabilities. The TOE generates a comprehensive set of audit logs that identify specific TOE operations. For each event, the TOE records the date and time of each event, the type of event, the subject identity, and the outcome of the event. Auditable events include: failure on invoking cryptographic functionality such as establishment, termination and failure of cryptographic session establishments and connections; Creation and update of Secure Association Key; modifications to the group of users that are part of the authorized administrator roles; all use of the user identification mechanism; any use of the authentication mechanism; Administrator lockout due to excessive authentication failures; any change in the configuration of the TOE, changes to time, initiation of TOE update, indication of completion of TSF self-test, maximum sessions being exceeded, termination of a remote session and attempts to unlock a termination session; and initiation and termination of a trusted channel.   

The TOE is configured to transmit its audit messages to an external syslog server. Communication with the syslog server is protected using IPsec and the TOE can determine when communication with the syslog server fails.  If that should occur, the TOE can be configured to block new permit actions. 

The logs can be viewed on the TOE using the appropriate IOS commands.  The records include the date/time the event occurred, the event/type of event, the user associated with the event, and additional information of the event and its success and/or failure.  The TOE does not have an interface to modify audit records, though there is an interface available for the authorized administrator to clear audit data stored locally on the TOE.

Cryptographic Support

The TOE provides cryptography in support of TOE security functionality.  All the algorithms claimed have CAVP certificates (Operation Environment - Cavium Octeon CN6230, a MIPS64 processor).  The TOE leverages the IOS Common Criteria Module (IC2M) Rel5 as identified in the table within the Security Target under Section 1.6.2. In addition, the TOE supports MACsec using proprietary Unified Access Data Plane (UADP) ASIC.  The MACsec Controller (MSC) is embedded within the ASICs that are utilized within Cisco hardware platforms.

The TOE provides cryptography in support of VPN connections that includes 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 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.

Identification and authentication

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 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 TOEs 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 as well as mandatory password complexity rules.  The TOE provides administrator authentication against a local user database.  Password-based authentication can be performed on the serial console or SSHv2 interfaces.  The SSHv2 interface also supports authentication using SSH keys.  The TOE supports 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 also provides an automatic lockout when a user attempts to authenticate and enters invalid information.  When the threshold for a defined number of authentication attempts fail has exceeded 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, and SSH connections.

Security Management

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;

·         Configuration of warning and consent access banners;

·         Configuration of session inactivity thresholds;

·         Updates of the TOE software;

·         Configuration of authentication failures;

·         Configuration of the audit functions of the TOE;

·         Configuration of the TOE provided services;

·         Configuration of the cryptographic functionality of the TOE;

·         Generate, install and manage PSK;

·         Manage the Key Server, CAK and MKA participants and

·         Configure lockout time interval for excessive authentication failures

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.  The privileged administrator is the Authorized Administrator of the TOE who has the ability to enable, disable, determine and modify the behavior of all of the security functions of the TOE as described in this document.

Protection of the TSF

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 is not a general-purpose operating system and access to Cisco IOS memory space is restricted to only Cisco IOS functions.

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.

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, or can configure the TOE to use NTP to synchronize the TOE’s clock with an external time source.  Finally, the TOE performs testing to verify correct operation of the switch itself and that of the cryptographic module.

TOE Access

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.  The TOE can also be configured to lock the Authorized Administrator account after a specified number of failed logon attempts until an authorized administrator can enable the user account. 

The TOE can also display an Authorized Administrator specified banner on the CLI management interface prior to allowing any administrative access to the TOE.

Trusted path/Channels

The TOE allows trusted channels 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. 

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.

Vendor Information

Cisco Systems, Inc.
Terrie Diaz
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