User Manual

Cybersecurity Basics
Introduction
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1 Cybersecurity Basics
1.1 Introduction
Cybersecurity includes all mechanisms for defending IT systems (such as computers,
devices like primary controllers or web servers of a building automation system)
against loss of system and information confidentiality, integrity and availability through
unauthorized access, disruption, modification, destruction or retrieval of Unrestricted
information as well as the usage of information gained without authorization through
fraud and other criminal acts. Cybersecurity can be implemented according to the
requirements set out by different industry and national standards that usually define
various protection levels depending on the usage of the system and the acceptable
risk level.
So far, the large majority of Cybersecurity breaches have been attacks on traditional
computer systems, such as internet, intranet or home networks. Damages caused
include denial of service, theft of critical private and business information, the
defrauding of bank accounts and credit cards and, most recently, so-called
ransomware.
In contrast, there have been fewer attacks on industrial controllers, such as building
automation controllers because they mostly run on proprietary operating systems, the
hardware has limited functionality and they are rarely connected to other networks.
Recently, industrial controllers have started to adopt mainstream computer standards
in order make them cheaper and more powerful; they are also very often connected to
other customer networks and the internet which, in turn, makes them more vulnerable
to attackers. Moreover, interconnections can be used to launch an attack from the
corporate network to the automation one and vice versa.
Therefore, it becomes important to provide an adequate level of security together with
modern building technology solutions.
1.2 Threat and Risk Terminology
The following is a brief glossary of common terminology used in Cybersecurity.
An asset is a material or immaterial entity that must be protected. It is important to list
the relevant assets and understand their values (for the business and potential
attackers) in order to define the correct level of protection.
A vulnerability is a weakness or lack of protection of a system that can be exploited.
Examples are hardcoded passwords, network services that do not properly verify their
inputs, self-made cryptography algorithms, and so on.
The exposure defines how easily an attacker can get access to the system in order to
perform malicious actions. Typically, the exposure is high if the system is connected to
the internet and can thus be reached from remote.
A threat is any potential damage that can result from the exploitation of vulnerability by
a threat agent, for example, a hacker can spot and use a hardcoded password to gain
access to a system.
The impact is the amount of damage that is suffered by assets in case there is a
Cybersecurity incident. In some cases, it is possible to estimate the extent of the
damage, even in monetary terms, such as the costs of replacing devices. However,
more often, the damage involves a loss of reputation and other intangible assets that
are difficult to calculate.
A risk is the probability that the threat agent would find and exploit the vulnerability
weighted with the relative impact on the business, for example, a hacker can find the
default admin password in some documentation: if the password was not properly