However, the truth is that if an attacker makes it into the ICS environment, there is no end to the harm they can do. Physical security: Physical security remains an often forgotten part of ICS (cyber)security.A classic example of a DOS attack is the SYN flood, where the attacker bombards the target system with so-called SYN packets – packets where the TCP SYN flag is set. DOS attacks are based on overloading target resources to the point where legitimate users can no longer interact with the target system. Denial of service attacks: By far the biggest risk to the ICS is denial of service ( DOS) attacks (uptime and availability are the main focus of an ICS).The following risk categories can be found in most ICS environments: User and process privileges that allow too much system accessĪdditionally, because security was not a design consideration for ICS or its components, security controls such as encryption, authentication, authorization, and accounting ( AAA), and logging are topically non-existent out of the box and difficult to impossible to add after the fact.Default system configurations that allow us to easily connect to/share/access resources. Default or easily guessable passwords (if there are passwords defined at all).This open nature often introduces common weaknesses in the system such as the following: By design, an ICS is meant to be open in nature, easily accessible to the people working with them, and leave little in the way of barriers for systems to interconnect. ICS environments are easy targets for attackers.
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