Sybex CEH Certified Ethical Hacker Version 8 Study Guide

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142 Chapter 6 ■ Enumeration of Services ■ ■ ■ ■ ■ Directory services that make use of LDAP include: Active Directory Novell eDirectory OpenLDAP Open Directory Oracle iPlanet In many cases the queries performed through LDAP against a database tend to disclose sensitive data that could be leveraged by an attacker. Many directory services offer ways to protect these queries through encryption or other mechanisms, which are either enabled by default or must be enabled by the administrator. Tools that allow for the enumeration of LDAP-enabled systems and services include the following: ■ JXplorer ■ LDAP Admin Tool ■ LDAP Account Manager ■ LEX (The LDAP Explorer) ■ Active Directory Explorer ■ LDAP Administration Tool ■ LDAP Search ■ Active Directory Domain Services Management Pack ■ LDAP Browser/Editor Enumeration Using NTP Another effective way to gather information about a network and the resources on it is through use of the Network Time Protocol (NTP). Before you look at how to exploit this protocol for information-gathering purposes, you need to understand what the protocol does and what purpose it serves. NTP is a protocol used to synchronize the clocks across the hosts on a network. The importance of the protocol is extremely high considering that directory services rely on clock settings for logon purposes. NTP uses UDP port 123 for communication purposes.
SMTP Enumeration 143 The following commands can be used against an NTP server: ■ ■ ■ ■ ntpdate ntptrace ntpdc ntpq SMTP Enumeration Yet another effective way of gathering information from a target is through the use of SMTP. This protocol is designed to send messages between servers that send and receive e-mail. SMTP is the standard used by the majority of e-mail servers and clients today. So how is this protocol used to gather information from a server? The process is quite simple if you have a fundamental understanding of a few commands and how to use them. If you are following along and wish to execute the following commands on a Windows system, be aware that for versions later than Windows XP Microsoft does not include a telnet client. You must download the client from Microsoft (at no charge). Using VRFY One easy way to verify the existence of e-mail accounts on a server is by using the telnet command to attach to the target and extract the information. The VRFY command is used within the protocol to check whether a specific user ID is present. However, this same command can be used by an attacker to locate valid accounts for attack, and if scripted, it could also be used to extract multiple accounts in a short time, as shown here: telnet 10.0.0.1 25 (where 10.0.0.1 is the server IP and 25 is the port for SMTP) 220 server1 ESMTP Sendmail 8.9.3 HELO 501 HELO requires domain address HELO x 250 server1 Hello [10.0.0.72], pleased to meet you VRFY chell 250 Super-User VRFY glados 550 glados... User unknown
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CEHv8 Certified Ethical Hacker Vers
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Senior Acquisitions Editor: Jeff Ke
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Acknowledgments First, I would like
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Contents at a Glance Introduction A
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xii Contents Chapter 3 Cryptography
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xiv Contents Commonly Exploited Ser
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xvi Contents Chapter 11 Denial of S
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xviii Contents Securing the Physica
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Introduction If you’re preparing
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Introduction xxiii How to Become a
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Introduction xxv Tips for Taking th
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Introduction xxvii 4. Answer all of
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Introduction xxix Network/wireless
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Assessment Test xxxi C. PPP D. SLIP
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Assessment Test xxxiii 19. An indiv
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Assessment Test xxxv 31. Which of t
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Answers to Assessment Test xxxvii 1
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CEHv8 Certified Ethical Hacker Vers
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In this book you will learn the var
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4 Chapter 1 ■ Getting Started wit
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10 Chapter 1 ■ Getting Started wi
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Every skill set comes with a histor
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28 Chapter 2 ■ System Fundamental
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This chapter covers cryptography, a
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58 Chapter 3 ■ Cryptography The p
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60 Chapter 3 ■ Cryptography ■
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62 Chapter 3 ■ Cryptography MARS
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64 Chapter 3 ■ Cryptography A has
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66 Chapter 3 ■ Cryptography The C
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68 Chapter 3 ■ Cryptography Under
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70 Chapter 3 ■ Cryptography TABLE
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72 Chapter 3 ■ Cryptography 5. On
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74 Chapter 3 ■ Cryptography PGP w
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76 Chapter 3 ■ Cryptography Revie
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78 Chapter 3 ■ Cryptography 13. W
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Chapter 4 Footprinting and Reconnai
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Understanding the Steps of Ethical
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What Is Footprinting? 85 Goals of t
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Terminology in Footprinting 87 Orga
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The Footprinting Process 89 Using S
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Page 231 and 232: Malware 189 How to Create a Virus C
Page 233 and 234: Malware 191 A Closer Look at Slamme
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Malware 193 ■ ■ Freeware—Down
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Malware 195 Operations that could b
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Malware 197 ■ NetMeeting Remote:
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Malware 199 Tools for Creating Troj
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Malware 201 5. In the next screen,
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Overt and Covert Channels 203 ■ P
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Exam Essentials 205 ■ ■ ■ ■
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Review Questions 207 7. Which utili
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Chapter 9 Sniffers CEH EXAM OBJECTI
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Understanding Sniffers 211 When on
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Using a Sniffer 213 In terms of LI,
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Using a Sniffer 215 2. Choose Captu
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Using a Sniffer 217 Table 9.1 lists
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Using a Sniffer 219 2. Next you nee
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Using a Sniffer 221 output from a s
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Using a Sniffer 223 3. Select the T
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Switched Network Sniffing 225 What
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Switched Network Sniffing 227 Port
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Switched Network Sniffing 229 root@
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Review Questions 231 Review Questio
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Review Questions 233 13. What is th
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Chapter 10 Social Engineering CEH E
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What Is Social Engineering? 237 If
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What Is Social Engineering? 239 eng
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What Is Social Networking? 241 Many
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What Is Social Networking? 243 Mist
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What Is Social Networking? 245 Ambe
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Commonly Employed Threats 247 Dumps
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Commonly Employed Threats 249 ■
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Identity Theft 251 Although some si
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Exam Essentials 253 Know about tech
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Review Questions 255 7. Phishing ca
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Review Questions 257 19. An attacke
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This chapter will give you a firm u
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262 Chapter 11 ■ Denial of Servic
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The concept of session hijacking is
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286 Chapter 12 ■ Session Hijackin
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Chapter 13 Web Servers and Web Appl
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Exploring the Client-Server Relatio
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Exam Essentials 323 Summary This ch
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Review Questions 325 7. In the fiel
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Review Questions 327 19. What may b
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This chapter covers SQL injection,
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332 Chapter 14 ■ SQL Injection SE
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334 Chapter 14 ■ SQL Injection Al
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336 Chapter 14 ■ SQL Injection Ru
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338 Chapter 14 ■ SQL Injection If
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340 Chapter 14 ■ SQL Injection On
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342 Chapter 14 ■ SQL Injection In
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344 Chapter 14 ■ SQL Injection
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346 Chapter 14 ■ SQL Injection 7.
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Chapter 15 Wireless Networking CEH
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What Is a Wireless Network? 351 ■
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What Is a Wireless Network? 353 nam
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What Is a Wireless Network? 355 Som
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What Is a Wireless Network? 357 ■
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What Is a Wireless Network? 359 Cra
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What Is a Wireless Network? 361 Wha
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What Is a Wireless Network? 363 Mis
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What Is a Wireless Network? 365 Als
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Summary 367 ■ ■ ■ An attacker
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Review Questions 369 Review Questio
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Review Questions 371 14. Bluejackin
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At this point in this book you have
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376 Chapter 16 ■ Evading IDSs, Fi
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Chapter 17 Physical Security CEH EX
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Introducing Physical Security 395 O
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Introducing Physical Security 397 s
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Introducing Physical Security 399 P
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Introducing Physical Security 401 S
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Introducing Physical Security 403 e
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Introducing Physical Security 405 a
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Introducing Physical Security 407 V
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Exam Essentials 409 opening 18 feet
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Review Questions 411 7. Which of th
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Review Questions 413 19. What mecha
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416 Appendix A ■ Answers to Revie
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438 Appendix B ■ About the Additi
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440 Appendix B ■ About the Additi
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442 ARP (Address Resolution Protoco
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444 Counter Mode with Cipher Block
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446 EIP (Extended Instruction Point
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448 Google Hacking Database (GHDB)
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450 IP DHCP Snooping feature - Limi
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452 mirrors, port - networks mirror
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454 passwords - ports passwords cha
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456 Remote Encrypted Callback Unix
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458 sniffers - stateful multilayer
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460 Teflon Oil Patch program - unpr
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462 webservers and web applications
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