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This question presents a  fictitious security vulnerability in a range of lasers printers.  The question requires that you develop SNORT IDS rules to detect exploits of this fictitious vulnerability. All information regarding this vulnerability is fabricated to give the illusion of a real security threat.  As a result, searches on the Internet will not yield any information regarding the signature of this vulnerability.  All the information required to detect exploits for this vulnerability are presented in this question, except where noted otherwise. 

You are a security specialist working for XYZ Incorporated.  XYZ use SNORT as their NIDS which protects both their IP sub-networks being 192.168.1.0/24 and 192.168.2.0/24. 

 

A security vulnerability has been detected in the Humphrey Pollard Laserprint 12050 printer model.  This vulnerability is remotely exploitable and allows the execution of arbitrary code. 

 

There is a bug in the way the printer processes the postscript spool management headerKerberos is one of the most secure authentication protocols being used today. The Kerberos authentication protocol is very briefly described on page 280 in Chapter 8 of the Ciampa textbook. You are required to do personal research to complete the following questions regarding this topic:

 

A. Give your general description of the Kerberos authentication protocol.

 

B. Explain the term: Authenticator used in the Kerberos authentication protocol.

 

C. In the Kerberos authentication protocol, there are 3 basic roles: client, server and Key Distribution Centre (KDC). Give your description of each of them.

 

D. By explaining the term: Session Ticket, describe how a session key is created by KDC, and distributed to the client and the server

 

E. Describe the mutual authentication procedure between the client and the server after the client obtains the session ticket

 

To answer these questions, you should consult reference materials from other texts and the Internet.  You are required to reference these sources – DO NOT DIRECTLY COPY material from them – i.e. use your own words.

 

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