Technical Cyber Security Alerts And Vulnerability Analysis

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Assume for the following questions that we are referring only to IPv4. 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 I would like to describe the following security alert Alert (TA13-175A) Risks of Default Passwords on the Internet Description: Generally default factory configurations for appliances and embedded systems contains simple and publicly open passwords and the vendor expect that user should change the password once they start using those systems for personal use. The alert is about the risk involved in keeping these factory default passwords when using the system for personal use. Attackers can easily track and identify such system connected to internet which uses default passwords and can hack your system or entire network. The default passwords are easily available in product documentation. Hackers can find such vulnerable systems using search engines like Shodan. Attackers use common attack techniques by logging in with blank, de... ... middle of paper ... ...s it back to OS. 10. OS then adds the IP address in HTTP request and sends the data to MIT server. 5b.) What is DNS caching? How and why is it used? DNS is used to provide a mapping between the websites name and their respective IP addresses. DNS caching is a mechanism to cache this Website name–IP address mapping on the DNS server for some amount of time. When number of users in the office or universities access same websites again and again then DNS caching is used to improve the performance of the system as DNS server doesn’t need to do all hierarchical searching using root name servers and TLD name servers for each and every user request. Network will be too overloaded if we don’t use DNS caching as DNS server needs to do number of DNS queries in order to find one IP address. DNS caching stores the IP addresses of frequently used websites in the organization.

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