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Written by LE Webmaster
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Wednesday, 26 January 2005 |
How serious a particular attack type is depends on two things: how the attack is carried out, and what damage is done to the compromised system. An attacker being able to run code on his machine is probably the most serious kind of attack for a home user. For an e-commerce company, a denial of service (DoS) attack or information leakage may be of more immediate concern. Each vulnerability that can lead to compromise can be traced to a particular category, or class, of attack.The properties of each class give you a rough feel for how serious an attack in that class is, as well as how hard it is to defend against. In this chapter, we explain each of the attack classes in detail, including what kinds of damage they can cause the victim, as well as what the attacker can gain
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Written by LE Webmaster
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Wednesday, 26 January 2005 |
Network encryption ensures that data sent across a network from one host to another is unreadable to a third party. If a sniffer intercepts the data, it finds the data unusable because the data is encrypted.Therefore, a hacker cannot view any
usernames or passwords, and any information sent across the network is safe.The requirement is that all communicating systems must support the same network encryption technique, such as Secure Shell (SSH).
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Written by LE Webmaster
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Wednesday, 26 January 2005 |
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Local hacking is, what I myself call, the way of gaining access to a computer while actually sitting at it. This article is a short listing of my experience in this area. When will we need the advantage of Local access
Let me take some examples. At the school i am currently attending, each student have a laptop. This laptop is borrowed from the school but the student may take it home with him or her every day of the year.
I suppose i don't even have to mention that with a bit more than 200 laptops in circulation there is quite some problems from time to time.That is why the school has a technician who repairs computers and, from time to time, Ghost's them (Norton Ghost).
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Written by LE Webmaster
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Wednesday, 26 January 2005 |
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Stories of cruel system administrators oppressing poor users have been around since the rise of UNIX in the 1970s. Users are inherently limited in what they can do on a UNIX system due to file permissions, passwords and other standard UNIX controls. However, it is often necessary to further restrict system users in other ways, both to protect them from themselves and to protect the system from the malicious or overly "playful" users. This article will discuss ways in which security administrators can limit what users are able to do on a UNIX system, with a particular focus on Linux. Both local and remote users will be considered. Be first to comment this article | Add as favourites (179) | Read more... |
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Written by LE Webmaster
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Wednesday, 26 January 2005 |
One of the first phases of a network penetration test or vulnerability assessment is typically to perform a network port scan to identify all the active services. There are a large number of port scanning tools and techniques available to do this and it is not the purpose of this article to discuss them. This article focuses on some of the tools and techniques that can be used to determine whether there is an Oracle TNS listener active on any of the identified listening ports. [The Oracle Transparent Network Substrate (TNS) protocol defines the communication protocol used between the database server and the database client applications. The TNS protocol provides an application interface to all industry-standard networking protocols e.g. TCP/IP. An example of a TNS enabled application is SQL*Net.]
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