Certified Ethical Hacker Quiz 7 Suppose your company has just passed a security risk assessment exercise. The results display that the risk of the breach in the main company application is 50%. Security staff has taken some measures and implemented the necessary controls. After that, another security risk assessment was performed showing that risk has decreased to 10%. The risk threshold for the application is 20%. Which of the following risk decisions will be the best for the project in terms of its successful continuation with the most business profit?Accept the riskIntroduce more controls to bring risk to 0%Mitigate the riskAvoid the risk What is the minimum number of network connections in a multihomed firewall?3542 What is not a PCI compliance recommendation?Use a firewall between the public network and the payment card data.Use encryption to protect all transmission of card holder data over any public networkRotate employees handling credit card transactions on a yearly basis to different departments.Limit access to card holder data to as few individuals as possible. Steve, a scientist who works in a governmental security agency, developed a technological solution to identify people based on walking patterns and implemented this approach to a physical control access. A camera captures people walking and identifies the individuals using Steve’s approach. After that, people must approximate their RFID badges. Both the identifications are required to open the door. In this case, we can say:Although the approach has two phases, it actually implements just one authentication factorThe solution implements the two authentication factors: physical object and physical characteristicThe solution will have a high level of false positivesBiological motion cannot be used to identify people What is the known plaintext attack used against DES which gives the result that encrypting plaintext with one DES key followed by encrypting it with a second DES key is no more secure than using a single key?Man-in-the-middle attackMeet-in-the-middle attackReplay attackTraffic analysis attack The change of a hard drive failure is once every three years. The cost to buy a new hard drive is $300. It will require 10 hours to restore the OS and software to the new hard disk. It will require a further 4 hours to restore the database from the last backup to the new hard disk. The recovery person earns $10/hour. Calculate the SLE, ARO, and ALE. Assume the EF = 1(100%). What is the closest approximate cost of this replacement and recovery operation per year?$1320$440$100$146 What is one of the advantages of using both symmetric and asymmetric cryptography in SSL/TLS?Supporting both types of algorithms allows less-powerful devices such as mobile phones to use symmetric encryption instead.Symmetric algorithms such as AES provide a failsafe when asymmetric methods fail.Symmetric encryption allows the server to security transmit the session keys out-of-band.Asymmetric cryptography is computationally expensive in comparison. However, it is well-suited to securely negotiate keys for use with symmetric cryptography. The collection of potentially actionable, overt, and publicly available information is known asOpen-source intelligenceReal intelligenceSocial intelligenceHuman intelligence Which Intrusion Detection System is best applicable for large environments where critical assets on the network need extra scrutiny and is ideal for observing sensitive network segments?HoneypotsFirewallsNetwork-based intrusion detection system (NIDS)Host-based intrusion detection system (HIDS) A bank stores and processes sensitive privacy information related to home loans. However, auditing has never been enabled on the system. What is the first step that the bank should take before enabling the audit feature?Perform a vulnerability scan of the system.Determine the impact of enabling the audit feature.Perform a cost/benefit analysis of the audit feature.Allocate funds for staffing of audit log review. What does the –oX flag do in an Nmap scan?Perform an eXpress scanOutput the results in truncated format to the screenOutput the results in XML format to a filePerform an Xmas scan You are attempting to run an Nmap port scan on a web server. Which of the following commands would result in a scan of common ports with the least amount of noise in order to evade IDS?nmap -A - Pnnmap -sP -p-65535 -T5nmap -sT -O -T0nmap -A --host-timeout 99 -T1 When purchasing a biometric system, one of the considerations that should be reviewed is the processing speed. Which of the following best describes what it is meant by processing?The amount of time and resources that are necessary to maintain a biometric systemHow long it takes to setup individual user accountsThe amount of time it takes to be either accepted or rejected from when an individual provides identification and authentication informationThe amount of time it takes to convert biometric data into a template on a smart card A penetration tester is conducting a port scan on a specific host. The tester found several ports opened that were confusing in concluding the Operating System (OS) version installed. Considering that NMAP result below, which of the following is likely to be installed on the target machine by the OS? Starting NMAP 5.21 at 2011-03-15 11:06 NMAP scan report for 172.16.40.65 Host is up (1.00s latency). Not shown: 993 closed ports PORT STATE SERVICE 21/tcp open ftp 23/tcp open telnet 80/tcp open http 139/tcp open netbios-ssn 515/tcp open 631/tcp open ipp 9100/tcp open MAC Address: 00:00:48:0D:EE:8The host is likely a Linux machine.The host is likely a printer.The host is likely a routerThe host is likely a Windows machine. An attacker is trying to redirect the traffic of a small office. That office is using their own mail server, DNS server and NTP server because of the importance of their job. The attacker gain access to the DNS server and redirect the direction www.google.com to his own IP address. Now when the employees of the office want to go to Google they are being redirected to the attacker machine. What is the name of this kind of attack?MAC FloodingSmurf AttackDNS spoofingARP Poisoning Which method of password cracking takes the most time and effort?Dictionary attackShoulder surfingRainbow tablesBrute force An attacker attaches a rogue router in a network. He wants to redirect traffic to a LAN attached to his router as part of a man-in-the-middle attack. What measure on behalf of the legitimate admin can mitigate this attack?Make sure that legitimate network routers are configured to run routing protocols with authentication.Disable all routing protocols and only use static routesOnly using OSPFv3 will mitigate this risk.Redirection of the traffic cannot happen unless the admin allows it explicitly. Internet Protocol Security IPsec is actually a suite pf protocols. Each protocol within the suite provides different functionality. Collective IPsec does everything except.Protect the payload and the headersEncryptWork at the Data Link LayerAuthenticate Which of the following programming languages is most susceptible to buffer overflow attacks, due to its lack of a built-in bounds checking mechanism? Code: #include int main(){ char buffer[8]; strcpy(buffer, ““11111111111111111111111111111””);} Output: Segmentation faultC#PythonJavaC++ A network administrator discovers several unknown files in the root directory of his Linux FTP server. One of the files is a tarball, two are shell script files, and the third is a binary file is named “nc.” The FTP server’s access logs show that the anonymous user account logged in to the server, uploaded the files, and extracted the contents of the tarball and ran the script using a function provided by the FTP server’s software. The ps command shows that the nc file is running as process, and the netstat command shows the nc process is listening on a network port. What kind of vulnerability must be present to make this remote attack possible?File system permissionsPrivilege escalationDirectory traversalBrute force login Scenario: 1. Victim opens the attacker’s web site. 2. Attacker sets up a web site which contains interesting and attractive content like ‘Do you want to make $1000 in a day?’. 3. Victim clicks to the interesting and attractive content URL. 4. Attacker creates a transparent ‘iframe’ in front of the URL which the victim attempts to click, so the victim thinks that he/she clicks on the ‘Do you want to make $1000 in a day?’ URL but actually he/she clicks on the content or URL that exists in the transparent 'iframe' which is setup by the attacker. What is the name of the attack which is mentioned in the scenario?Session FixationHTML InjectionHTTP Parameter PollutionClickjacking Attack You are working as a Security Analyst in a company XYZ that owns the whole subnet range of 23.0.0.0/8 and 192.168.0.0/8. While monitoring the data, you find a high number of outbound connections. You see that IP’s owned by XYZ (Internal) and private IP’s are communicating to a Single Public IP. Therefore, the Internal IP’s are sending data to the Public IP. After further analysis, you find out that this Public IP is a blacklisted IP, and the internal communicating devices are compromised. What kind of attack does the above scenario depict?Botnet AttackSpear Phishing AttackAdvanced Persistent ThreatsRootkit Attack Which of the following tools is used to detect wireless LANs using the 802.11a/b/g/n WLAN standards on a Linux platform?KismetAbelNetstumblerNessus You are the Network Admin, and you get a complaint that some of the websites are no longer accessible. You try to ping the servers and find them to be reachable. Then you type the IP address and then you try on the browser, and find it to be accessible. But they are not accessible when you try using the URL. What may be the problem?Traffic is Blocked on UDP Port 53Traffic is Blocked on TCP Port 80Traffic is Blocked on TCP Port 54Traffic is Blocked on UDP Port 80 Jim’s company regularly performs backups of their critical servers. But the company cannot afford to send backup tapes to an off-site vendor for long-term storage and archiving. Instead, Jim’s company keeps the backup tapes in a safe in the office. Jim’s company is audited each year, and the results from this year’s audit show a risk because backup tapes are not stored off-site. The Manager of Information Technology has a plan to take the backup tapes home with him and wants to know what two things he can do to secure the backup tapes while in transit?Encrypt the backup tapes and transport them in a lock box.Degauss the backup tapes and transport them in a lock box.Hash the backup tapes and transport them in a lock box.Encrypt the backup tapes and use a courier to transport them. Time is Up!
