Nortel Networks Nortel Network VPN Router and Client Workstation 7.05 - Manual (Page 16)

Security Target, Version 3.9 March 18, 2008
Nortel VPN Router v7.05 and Client Workstation v7.11 Page 16 of 67
© 2008 Nortel Networks
3 TOE Security Environment
This section describes the security aspects of the environment in which the TOE will be used and the manner in
which the TOE is expected to be employed. Section 3.1 provides assumptions about the secure usage of the TOE,
including physical, personnel, and connectivity aspects. Section 3.2 lists the known and presumed threats countered
by either the TOE or by the security environment.
3.1 Assumptions
This section contains assumptions regarding the security environment and the intended usage of the TOE. The
following specific conditions are required to ensure the security of the TOE and are assumed to exist in an
environment where this TOE is employed.
A.TRAINED-ADMIN It is assumed that administrators will be trained in the secure use of the TOE and will
follow the policies and procedures defined in the TOE documentation for secure
administration of the TOE. Administrators are assumed to be non-hostile.
A.TIMESTAMPS It is assumed that the TOE relies on the operating environment of TOE to provide
accurate clock time in order to create an accurate time stamp for audit events.
Administrators are responsible for the maintenance of a reliable time source for use with
audit operations.
A.PHYSICAL It is assumed that the TOE may be susceptible to physical attacks by an attacker. It is
assumed that the TOE will be housed within a physically secure environment in order to
mitigate this risk.
A.CERTIFICATE It is assumed that the environment will provide the necessary infrastructure to ensure that
certificates can be validated when digital certificates are used for authentication. This
may mean the environment provides a connection to a trusted Certificate Authority, or
that the required certificates are otherwise available to the TOE. It is assumed that the
appropriate infrastructure is properly maintained in order to ensure the accuracy and
security of the certificates (e.g., certificates are revoked in a timely manner).
A.INSTALL It is assumed that the TOE is delivered, installed, and setup in accordance with
documented delivery and installation/setup procedures.
A.ACCESS It is assumed that the TOE has access to all of the Information Technology (IT) System
data it needs to perform its functions.
A.DOMSEP It is assumed that the IT environment will maintain a security domain for the Nortel VPN
software that protects it from interference and tampering by untrusted subjects.
3.2 Threats to Security
This section identifies the threats to the IT assets (private networks) against which protection is required by the TOE
or by the security environment. The threat agents are divided into two categories: