Protocols are a common focus of attack because of the number of devices that can be targeted. Devices made by different vendors are able to communicate and work with each other because of standard protocols that allow them to understand each other. The wide use of these protocols makes them an appealing target to attackers. If a flaw can be found in a popular protocol, then many devices made by different vendors will be vulnerable to the attack. There are a number of different protocols over the years that have been updated due to vulnerabilities found in their original versions, a prime example being the SSH protocol.
SSH (Secure Shell) is a network protocol that allows users to remotely login to a computer in order to perform tasks such as executing commands and transferring files. It was designed in 1995 as a means to replace less secure protocols like rlogin and telnet. The problem with these protocols is that information, including passwords, is send as plaintext (Rosasco, & Larochelle, 2003). SSH addresses this issue by encrypting traffic sent between the devices. Even with these improvements in security, the original version of SSH, referred to as SSH1 or SSH-1, was not without its own vulnerabilities.
One vulnerability of SSH-1 allowed an attacker to insert malicious commands into an encrypted session. These commands would be accepted by the server and ran with the privileges of the user that established the connection. This attack would become known as the “SSH insertion attack”. In order to perform the attack, a person would first need access to the traffic being send between the client and server. This is possible through traditional network monitoring software, as well as through a TCP hijack attack. Once this is don...
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Works Cited
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Lanza, J.P. (2003b, May 19). Vulnerability note vu#945216. United States Computer Emergency Readiness Team, Retrieved from http://www.kb.cert.org/vuls/id/945216
Rosasco, N., & Larochelle, D. (2003, May 30). How and why more secure technologies succeed in legacy markets: lessons from the success of ssh. Computer Science at the University of Virginia, Retrieved from http://www.cs.virginia.edu/~drl7x/sshVsTelnetWeb3.pdf
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For this final paper, I would like to discuss the historical failures that came into light when Mr. Clifford Stoll (the author of “Cuckoo’s Egg: Tracking a spy through the Maze of Computer Espionage” book) stumbled upon a $ 0.75 accounting error and the revelations that followed, its potential findings, risks and costs associated and why it is important to address and fix those security holes. Cuckoo’s Egg is an interesting read and the author was successful in presenting to his readers the picture of beginning of Internet days (arpanet, then), network practices then. Despite of the fact that this book describes a real incident that in 1980’s, some of the findings are relevant and torment us even today.
On August 12, 2003, a computer worm was released called MSBlaster.B, which was distributed through two files “teekids.exe” ( which included code that directs compromised computers to attack the Microsoft domain name www.windowsupdate.com and a backdoor file “Lithium” ( which allows a way into a password protected system without use of a password and remote control a system). The worm itself targeted mostly Windows 2000 & Windows XP systems. If Windows NT or Windows 2003 servers do not have the appropriate patches, they too may be vulnerable. The function of the worm is to exploit the DCOM RPC vulnerability.
and their use. In Committee on Deterring Cyber attacks: Informing Strategies and Developing Options (Ed.), Proceedings of a Workshop on Deterring Cyber attacks: Informing Strategies and Developing Options for U.S. Policy. Washington, D.C.: National Academies Press.
1.) (3 points) The US Computer Emergency Readiness Team (US-CERT) publishes what are called Technical Cyber Security Alerts and Vulnerability Notes and these documents alert users to potential threats to the security of their systems. Select a Technical Security Alert or Vulnerability Note published in the last twelve months that has a network related component to it and research the reported problem and the suggested solution (if one is available.) Analyze and describe the problem, and the solution paying close attention to the network related issues that it raises. We are interested in reading your analysis, and not a cut-and-paste of what is on the website. The listing of recent Technical Security Alerts can be found at: http://www.us-cert.gov/cas/techalerts/ and the listing of Vulnerability Notes is at http://www.kb.cert.org/vuls
The Web. 16 Oct 2011. GlobalSecurity.org -. N.p., n.d. Web. The Web.
Diffie, Whitfield. (2008). Information Security: 50 Years Behind, 50 Years Ahead. Communications of the ACM. 51(1), 55-57.
Nowadays, most of the web, email, database and fileservers are Linux servers. Linux is a UNIX system which implies that it has solid compatibility, stability and security features. Linux is used for the mentioned environments because these services require high security. Further, an increase of attacks on these servers can be observed. Additionally, the methods to prevent intrusions on Linux machines are insufficient. Further, the analysis of incidents on Linux systems are not considered appropriately (Choi, Savoldi, Gubian, Lee, & Lee, 2008). It can also be observed that a lot of investigators do not have experience with Linux forensics (Altheide, 2004).
In July 2015, many of the world’s high ranking cryptographers published that the loss and destruction induced by adopting a key escrow system 20 years ago would be even more serious, that would be very hard to identify security weaknesses that could be misused by
There is constant concern about different kinds of devices and tools because of their vulnerability: laptops; personal computers in the home; libraries and public workstations; USB Flash Drives and email, to name a few. These items are easily accessible for those attempting to breach security.... ... middle of paper ... ...
There are numerous network security devices and tools available to aid in computer network defense, and these tools are often relied upon for protecting against increasingly sophisticated, stealthy, and damaging attacks. When acting alone, the current generation of security devices has an exceedingly difficult time providing an effective defense against such threats, and the situation is particularly grim for targeted or novel attacks.
Paisley. "The Impact of a Cyber War." Defense Tech RSS. N.p., 16 Jan. 2008. Web. 21 Nov. 2013. (Source H)
One of the largest parts of commerce is transaction. Transactions are needed anytime two parties exchange money or information. Since the Information Age has begun, transactions are more common over the Internet, where it is more imperative that transactions are secure (Klein x). Corporations have also become more widespread, which means that cryptography is needed to secu...
capacity and performance. However, as networks enable more and more applications and are available to more and more users, they become ever more vulnerable to a wider range of security threats. To combat those threats and ensure that e-business transactions are not compromised, security technology must play a major role in today's networks.
Thomas, Teka. "Cyber defense: Who 's in charge?" National Defense July 2015: 21+. War and Terrorism Collection. Web. 28 Oct.
Melford, RJ 1993, 'Network security ', The Internal Auditor, vol. 50, no. 1, p. 18.