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Cisco ASA NDM Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • The Cisco ASA must be configured to enforce password complexity by requiring that at least one lowercase character be used.

    Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resistin...
    Rule Medium Severity
  • The Cisco ASA must be configured to enforce password complexity by requiring that at least one numeric character be used.

    Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resistin...
    Rule Medium Severity
  • The Cisco ASA must be configured to require that when a password is changed, the characters are changed in at least eight of the positions within the password.

    If the application allows the user to consecutively reuse extensive portions of passwords, this increases the chances of password compromise by increasing the window of opportunity for attempts at ...
    Rule Medium Severity
  • The Cisco ASA must be configured to terminate all network connections associated with a device management session at the end of the session, or the session must be terminated after five minutes of inactivity except to fulfill documented and validated mission requirements.

    Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port th...
    Rule High Severity
  • The Cisco ASA must be configured to synchronize its clock with the primary and secondary time sources using redundant authoritative time sources.

    The loss of connectivity to a particular authoritative time source will result in the loss of time synchronization (free-run mode) and increasingly inaccurate time stamps on audit events and other ...
    Rule Medium Severity
  • The Cisco ASA must be configured to authenticate Simple Network Management Protocol (SNMP) messages using a FIPS-validated Keyed-Hash Message Authentication Code (HMAC).

    Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. Bidirectional authentication provides stronger safeguards to validate the...
    Rule Medium Severity
  • The Cisco ASA must be configured to authenticate Network Time Protocol sources using authentication that is cryptographically based.

    If Network Time Protocol is not authenticated, an attacker can introduce a rogue NTP server. This rogue server can then be used to send incorrect time information to network devices, which will mak...
    Rule Medium Severity
  • The Cisco ASA must be configured to implement cryptographic mechanisms using a FIPS 140-2 approved algorithm to protect the confidentiality of remote maintenance sessions.

    This requires the use of secure protocols instead of their unsecured counterparts, such as SSH instead of telnet, SCP instead of FTP, and HTTPS instead of HTTP. If unsecured protocols (lacking cryp...
    Rule High Severity
  • The Cisco ASA must be configured to generate audit records for privileged activities or other system-level access.

    Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an in...
    Rule Medium Severity
  • The Cisco ASA must be configured to conduct backups of system-level information contained in the information system when changes occur.

    System-level information includes default and customized settings and security attributes, including ACLs that relate to the network device configuration, as well as software required for the execu...
    Rule Medium Severity

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