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[General] 312-50v13 Valid Dumps Ppt | 312-50v13 Reliable Study Guide

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【General】 312-50v13 Valid Dumps Ppt | 312-50v13 Reliable Study Guide

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ECCouncil Certified Ethical Hacker Exam (CEHv13) Sample Questions (Q825-Q830):NEW QUESTION # 825
You are a penetration tester and are about to perform a scan on a specific server. The agreement that you signed with the client contains the following specific condition for the scan: "The attacker must scan every port on the server several times using a set of spoofed sources IP addresses. " Suppose that you are using Nmap to perform this scan. What flag will you use to satisfy this requirement?
  • A. The -D flag
  • B. The -A flag
  • C. The -f flag
  • D. The -g flag
Answer: A
Explanation:
flags -source-port and -g are equivalent and instruct nmap to send packets through a selected port. this option is used to try to cheat firewalls whitelisting traffic from specific ports. the following example can scan the target from the port twenty to ports eighty, 22, 21,23 and 25 sending fragmented packets to LinuxHint.

NEW QUESTION # 826
An Nmap SMTP enumeration script returns valid usernames. What misconfiguration is being exploited?
  • A. SMTP authentication bypass
  • B. SMTP VRFY/EXPN/RCPT commands exposed
  • C. Misconfigured MX records
  • D. STARTTLS disabled
Answer: B
Explanation:
This scenario demonstrates SMTP Enumeration, a classic enumeration technique described in CEH v13 Network Enumeration. SMTP servers may expose commands such as VRFY, EXPN, and RCPT TO, which can be abused to validate user accounts.
When these commands are enabled without restriction, attackers can enumerate valid usernames without authentication. The Nmap script used explicitly leverages these commands, confirming the misconfiguration.
Option B is incorrect because authentication is not bypassed. Option C concerns DNS routing, not user enumeration. Option D relates to encryption, not enumeration capability.
CEH v13 strongly recommends disabling or restricting SMTP user verification commands. Thus, Option A is correct.

NEW QUESTION # 827
A Security Engineer at a medium-sized accounting firm has been tasked with discovering how much information can be obtained from the firm's public-facing web servers. The engineer decides to start by using netcat to port 80.
The engineer receives this output:
HTTP/1.1 200 OK
Server: Microsoft-IIS/6
...
Which of the following is an example of what the engineer performed?
  • A. Whois database query
  • B. Cross-site scripting
  • C. Banner grabbing
  • D. SQL injection
Answer: C
Explanation:
In CEH v13 Module 03: Scanning Networks, banner grabbing is defined as a technique used during reconnaissance to capture service banners that provide information about:
Web server version
Operating system
Service details
In This Case:
The engineer used Netcat to connect to port 80 (HTTP).
The response reveals the web server software (Microsoft-IIS/6), which is typical of a banner returned in the server's HTTP response headers.
This technique helps identify vulnerable versions of services.
Other Options:
B). SQL injection: Involves sending SQL payloads - unrelated here.
C). Whois query: Provides domain registration info - unrelated.
D). Cross-site scripting: Requires injecting scripts into a web app - not relevant here.
Reference:
Module 03 - Banner Grabbing and Service Identification Techniques
CEH Labs: Using Netcat and Telnet for Manual Banner Grabbing

NEW QUESTION # 828
Elante company has recently hired James as a penetration tester. He was tasked with performing enumeration on an organization's network. In the process of enumeration, James discovered a service that is accessible to external sources. This service runs directly on port 21.
What is the service enumerated by James in the above scenario?
  • A. Remote Procedure Call (RPC)
  • B. Border Gateway Protocol (BGP)
  • C. Network File System (NFS)
  • D. File Transfer Protocol (FTP)
Answer: D
Explanation:
In CEH v13 Module 04: Enumeration, identifying services based on well-known port numbers is foundational for enumeration and scanning activities.
Port 21/TCP is assigned to the File Transfer Protocol (FTP).
FTP is a standard protocol used to upload, download, and manage files on a remote server.
During enumeration, open FTP ports can be probed for:
Anonymous login
Banner grabbing
Directory traversal vulnerabilities
Option Clarification:
A: BGP: Runs on TCP port 179.
C: NFS: Commonly uses port 2049.
D: RPC: Dynamically uses multiple ports.
Correct answer is B. FTP (port 21).
Reference:
Module 04 - Enumeration Ports and Services
CEH eBook Appendix: Common Port Numbers and Protocols

NEW QUESTION # 829
Suppose that you test an application for the SQL injection vulnerability. You know that the backend database is based on Microsoft SQL Server. In the login/password form, you enter the following credentials:
Username: attack' or 1=1 --
Password: 123456
Based on the above credentials, which of the following SQL commands are you expecting to be executed by the server, if there is indeed an SQL injection vulnerability?
  • A. select * from Users where UserName = 'attack or 1=1 -- and UserPassword = '123456'
  • B. select * from Users where UserName = 'attack'' or 1=1 -- and UserPassword = '123456'
  • C. select * from Users where UserName = 'attack' or 1=1 --' and UserPassword = '123456'
  • D. select * from Users where UserName = 'attack' or 1=1 -- and UserPassword = '123456'
Answer: D
Explanation:
In CEH v13 Module 10: Injection Attacks, the SQL Injection technique is covered extensively. A common attack method is to manipulate the input fields so that the resulting SQL query becomes logically always true, effectively bypassing authentication.
Given the input:
Username: attack' or 1=1 --
Password: 123456
And assuming the original SQL query is:
SELECT * FROM Users WHERE UserName = '<input_username>' AND UserPassword =
'<input_password>';
When inputs are substituted, the query becomes:
SELECT * FROM Users WHERE UserName = 'attack' or 1=1 --' AND UserPassword = '123456'; The -- sequence is used in SQL to indicate a comment. Everything after -- is ignored by the SQL engine. So the query essentially becomes:CopyEdit SELECT * FROM Users WHERE UserName = 'attack' or 1=1; This query is always true due to 1=1, and if the application is vulnerable, it grants access regardless of the password.
Option Analysis:
A). Incorrect - Contains '' (double quote) after attack, which would cause a syntax error due to extra quotation marks.
B). Correct - This is the accurate representation of what the SQL query would look like with a successful injection.
C). Incorrect - The input string is malformed, combining input into one literal string.
D). Incorrect - Misplacement of ' after the comment token -- invalidates the SQL syntax.
Reference from CEH v13 Study Materials:
Module 10 - Injection Attacks, Section: SQL Injection - Authentication Bypass CEH v13 eCourseware Practical Lab: Exploiting SQL Injection Vulnerability in Login Forms CEH Engage - Web Application Testing Phase: SQLi Exploitation in Login Panels

NEW QUESTION # 830
......
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