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Cyber security for power engineering
Sedláková, Dáša ; Kohout, David (referee) ; Mlýnek, Petr (advisor)
Due to the IT and OT networks convergence, industrial systems are becoming vulnerable to different forms of security threats including rapidly growing cyber-attacks. Thesis is focused on an analysis of security recommendations in IEC 62351, vulnerability testing of industrial communication protocols (e.g., IEC 61850) and mitigations proposal. An ATT&CK framework for ICS was chosen to become a methodology base for vulnerability testing. ATT&CK tactics and techniques were used to practically test vulnerability scans, SMV time synchronization, GOOSE spoofing, MMS Man in the Middle and ICMP Flood attacks. Attacks tested were evaluated with a risk analysis. Subsequently, mitigation measures were proposed on several levels (OT, IT, perimeter and physical level).
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Penetration tests and network device vulnerability scanning
Gregr, Filip ; Martinásek, Zdeněk (referee) ; Hajný, Jan (advisor)
This thesis is dealing with penetration tests and network device vulnerability assessment. Theoretical part includes analysis of this issue and description of general methodology of performing penetration tests. Thesis provides basic overview of requirements of international norms ISO 27000 and PCI DSS. In another part the software for Nessus vulnerability scanning and Linux Kali distrubution is introduced. Practical part of thesis includes several aims. The first is a comparsion of five vulnerability scanners in a created test network. Chosen tools for this purpose are Nessus, OpenVAS, Retina Community, Nexpose Community and GFI LanGuard. Network scan is performed with each of~these tools. Penetration test using the tools available in Kali Linux is then executed in this network. Procedure of exploiting two selected vulnerabilities is created as a laboratory exercise. The last aim of thesis is testing the web server protection against flood attacks SYN flood, UDP flood and slow attack Slowloris. Scripts for flooding were written in Python language.
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Cyber security for power engineering
Sedláková, Dáša ; Kohout, David (referee) ; Mlýnek, Petr (advisor)
Due to the IT and OT networks convergence, industrial systems are becoming vulnerable to different forms of security threats including rapidly growing cyber-attacks. Thesis is focused on an analysis of security recommendations in IEC 62351, vulnerability testing of industrial communication protocols (e.g., IEC 61850) and mitigations proposal. An ATT&CK framework for ICS was chosen to become a methodology base for vulnerability testing. ATT&CK tactics and techniques were used to practically test vulnerability scans, SMV time synchronization, GOOSE spoofing, MMS Man in the Middle and ICMP Flood attacks. Attacks tested were evaluated with a risk analysis. Subsequently, mitigation measures were proposed on several levels (OT, IT, perimeter and physical level).
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Penetration tests and network device vulnerability scanning
Gregr, Filip ; Martinásek, Zdeněk (referee) ; Hajný, Jan (advisor)
This thesis is dealing with penetration tests and network device vulnerability assessment. Theoretical part includes analysis of this issue and description of general methodology of performing penetration tests. Thesis provides basic overview of requirements of international norms ISO 27000 and PCI DSS. In another part the software for Nessus vulnerability scanning and Linux Kali distrubution is introduced. Practical part of thesis includes several aims. The first is a comparsion of five vulnerability scanners in a created test network. Chosen tools for this purpose are Nessus, OpenVAS, Retina Community, Nexpose Community and GFI LanGuard. Network scan is performed with each of~these tools. Penetration test using the tools available in Kali Linux is then executed in this network. Procedure of exploiting two selected vulnerabilities is created as a laboratory exercise. The last aim of thesis is testing the web server protection against flood attacks SYN flood, UDP flood and slow attack Slowloris. Scripts for flooding were written in Python language.
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Vulnerability Management in the Corporate IT Infrastructure
Hronek, Tomáš ; Veber, Jaromír (advisor) ; Klíma, Tomáš (referee)
The present thesis deals with the area of vulnerability management and its relation to information security. Its main purpose is to set the topic of vulnerability management in context of company information security and to explain its relationship to related disciplines. In the practical part, selected vulnerability assessment tools are compared and methodology is applied to determine the criticality of the vulnerabilities identified in relation to the provided IT services. The objectives were achieved by literature review, personal consultations with employees responsible for information security at J&T Bank and by comparing the results of several tools for assessing vulnerability (Nessus, Retina, OpenVAS, Nexpose, Tripwire). To date, there has not been published a thesis devoted exclusively to the topic of vulnerability management. This thesis is the first one to provide comparable results of vulnerability scanning of the same targets. Equally valuable is the application of Common Vulnerability Scoring System to determine the criticality of the vulnerabilities identified in relation to delivered IT services.
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