312-50v11 : Certified Ethical Hacker v11 Exam : Part 03

312-50v11 : Certified Ethical Hacker v11 Exam : Part 03

1. 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 <string.h> int main(){ char buffer[8];
   strcpy(buffer, ““11111111111111111111111111111””);} Output: Segmentation fault

   • C#
   • Python
   • Java
   • C++

2. 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 headers
   • Encrypt
   • Work at the Data Link Layer
   • Authenticate

3. 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 routes
   • Only using OSPFv3 will mitigate this risk.
   • Redirection of the traffic cannot happen unless the admin allows it explicitly.

4. Which method of password cracking takes the most time and effort?

   • Dictionary attack
   • Shoulder surfing
   • Rainbow tables
   • Brute force

5. 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 Flooding
   • Smurf Attack
   • DNS spoofing
   • ARP Poisoning

6. 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:8

   • The host is likely a Linux machine.
   • The host is likely a printer.
   • The host is likely a router.
   • The host is likely a Windows machine.

7. 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 system
   • How long it takes to setup individual user accounts
   • The amount of time it takes to be either accepted or rejected from when an individual provides identification and authentication information
   • The amount of time it takes to convert biometric data into a template on a smart card

8. 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 – Pn
   • nmap -sP -p-65535 -T5
   • nmap -sT -O -T0
   • nmap -A –host-timeout 99 -T1

9. What does the –oX flag do in an Nmap scan?

   • Perform an eXpress scan
   • Output the results in truncated format to the screen
   • Output the results in XML format to a file
   • Perform an Xmas scan

10. 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.

11. 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?

    • Honeypots
    • Firewalls
    • Network-based intrusion detection system (NIDS)
    • Host-based intrusion detection system (HIDS)

12. The collection of potentially actionable, overt, and publicly available information is known as

    • Open-source intelligence
    • Real intelligence
    • Social intelligence
    • Human intelligence

13. 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.

14. 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

15. 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 attack
    • Meet-in-the-middle attack
    • Replay attack
    • Traffic analysis attack

16. 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 factor
    • The solution implements the two authentication factors: physical object and physical characteristic
    • The solution will have a high level of false positives
    • Biological motion cannot be used to identify people

17. 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 network.
    • Rotate employees handling credit card transactions on a yearly basis to different departments.
    • Limit access to card holder data to as few individuals as possible.

18. What is the minimum number of network connections in a multihomed firewall?

    • 3
    • 5
    • 4
    • 2

19. 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 risk
    • Introduce more controls to bring risk to 0%
    • Mitigate the risk
    • Avoid the risk

20. You need to deploy a new web-based software package for your organization. The package requires three separate servers and needs to be available on the Internet. What is the recommended architecture in terms of server placement?

    • All three servers need to be placed internally
    • A web server facing the Internet, an application server on the internal network, a database server on the internal network
    • A web server and the database server facing the Internet, an application server on the internal network
    • All three servers need to face the Internet so that they can communicate between themselves