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One Identity Safeguard for Privileged Sessions 6.9.3 - ServiceNow - Tutorial

Introduction

This document describes how you can use the services of ServiceNow to authenticate and authorize the sessions of your privileged users with One Identity Safeguard for Privileged Sessions (SPS).

One Identity Safeguard for Privileged Sessions:

One Identity Safeguard for Privileged Sessions (SPS) controls privileged access to remote IT systems, records activities in searchable, movie-like audit trails, and prevents malicious actions. SPS is a quickly deployable enterprise device, completely independent from clients and servers — integrating seamlessly into existing networks. It captures the activity data necessary for user profiling and enables full user session drill down for forensic investigations.

SPS acts as a central authentication gateway, enforcing strong authentication before users access sensitive IT assets. SPS can integrate with remote user directories to resolve the group memberships of users who access nonpublic information. Credentials for accessing information systems can be retrieved transparently from SPS's local Credential Store or a third-party password management system. This method protects the confidentiality of passwords as users can never access them. When used together with ServiceNow (or another Multi-Factor Authentication (MFA) provider), SPS directs all connections to the authentication tool, and upon successful authentication, it permits the user to access the information system.

Integrating ServiceNow with SPS:

SPS integrates with ServiceNow by enabling ticket ID request and validation during authentication and authorization on target servers.

The integration adds an additional security layer to the gateway authentication performed on SPS by verifying that the user has a valid reason to access the server. SPS prompts the user for a valid ServiceNow ticket ID, and upon successful authorization, it permits the user to access the information system.

Meet compliance requirements

ISO 27001, ISO 27018, SOC 2, and other regulations and industry standards include authentication-related requirements, (for example, Multi-Factor Authentication (MFA) for accessing production systems, and the logging of all administrative sessions). In addition to other requirements, using SPS and ServiceNow helps you comply with the following requirements:

  • PCI DSS 8.3: Secure all individual non-console administrative access and all remote access to the cardholder data environment (CDE) using MFA.

  • PART 500.12 Multi-Factor Authentication: Covered entities are required to apply MFA for:

    • Each individual accessing the covered entity’s internal systems.

    • Authorized access to database servers that allow access to nonpublic information.

    • Third parties accessing nonpublic information.

  • NIST 800-53 IA-2, Identification and Authentication, network access to privileged accounts: The information system implements MFA for network access to privileged accounts.

Technical requirements

In order to successfully connect SPS with RADIUS server, you need the following components.

In ServiceNow:

  • An active ServiceNow instance.

  • A technical user who has access to the ServiceNow REST API.
In SPS:

  • A One Identity Safeguard for Privileged Sessions appliance (virtual or physical), at least version SPS 5.11.0.

  • A copy of the SPS ServiceNow plugin. This plugin is an Authentication and Authorization (AA) plugin customized to work with ServiceNow.

  • SPS must be able to access the Internet (at least the API services). Since ServiceNow is a cloud-based service provider, SPS must be able to access its web services to authorize the user.

    The connection also requires the ServiceNow ticket ID.

  • SPS supports AA plugins in the MSSQL, RDP, SSH, and Telnet protocols.

  • In RDP, using an AA plugin together with Network Level Authentication in a Connection Policy has the same limitations as using Network Level Authentication without domain membership.

  • In RDP, using an AA plugin requires TLS-encrypted RDP connections. For details, see "Enabling TLS-encryption for RDP connections" in the Administration Guide.

Availability and support of the plugin

The SPS ServiceNow plugin is available for download as-is, free of charge to every SPS customer from the ServiceNow plugin for Safeguard for Privileged Sessions page. In case you need any customizations or additional features, contact our Support Team.

 Caution:

Using custom plugins in SPS is recommended only if you are familiar with both Python and SPS. Product support applies only to SPS: that is, until the entry point of the Python code and passing the specified arguments to the Python code. One Identity is not responsible for the quality, resource requirements, or any bugs in the Python code, nor any crashes, service outages, or any other damage caused by the improper use of this feature, unless explicitly stated in a contract with One Identity. If you want to create a custom plugin, contact our Support Team for details and instructions.

How SPS and ServiceNow work together in detail

Figure 1: How SPS and ServiceNow work together

  1. A user attempts to log in to a protected server.

  2. Gateway authentication on SPS

    SPS receives the connection request and authenticates the user. SPS can authenticate the user to a number of external user directories, (for example, LDAP, Microsoft Active Directory, or RADIUS). This authentication is the first factor.

  3. Check if the user is exempt from multi-factor authentication and authorization

    You can configure SPS using whitelists and blacklists to selectively require multi-factor authentication and authorization for your users, (for example, to create break-glass access for specific users).

    • If multi-factor authentication and authorization is not required, the user can start working, while SPS records the user's activities. The procedure ends here.

    • If multi-factor authentication and authorization is required, SPS continues the procedure with the next step.

    For details on creating exemption lists, see [WHITELIST].

  4. Determining the external ServiceNow identity

    If the gateway usernames are different from the external ServiceNow identities, you must configure the SPS ServiceNow plugin to map the gateway usernames to the external ServiceNow identities.

    The mapping can be as simple as appending a domain name to the gateway username, or you can query an LDAP or Microsoft Active Directory server.

    For details, see [USERMAPPING].

  5. Outband authorization on ServiceNow

    If gateway authentication is successful, SPS prompts the user for a valid ServiceNow ticket ID. Then SPS connects to the ServiceNow server and runs a predefined query, and upon successful authorization, it permits the user to access the information system.

  6. If multi-factor authentication and authorization is successful, the user can start working, while SPS records the user's activities. (Optionally, SPS can retrieve credentials from a local or external Credential Store or password vault, and perform authentication on the server with credentials that are not known to the user.)

  7. If the user opens a new session within a short period, they can do so without having to perform multi-factor authentication again. After this configurable grace period expires, the user must perform multi-factor authentication to open the next session.

    For details, see [authentication_cache].

Notable features

This section contains the notable features of this plugin.

  • To map the gateway usernames to the external ServiceNow identities if the gateway usernames are different from the ServiceNow usernames, configure the [USERMAPPING] section of the plugin.

  • The [WHITELIST] section allows configuring authentication whitelists and blacklists for example to create break-glass access for specific users to allow them to bypass ServiceNow authentication.

  • The [authentication_cache] section contains the settings that determine how soon after performing a ServiceNow authentication must the user repeat the authentication when opening a new session.

  • The [connection_limit by=client_ip_gateway_user] section contains the options related to limiting parallel sessions.

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