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Code d'Examen: CEH-001
Nom d'Examen: GAQM (Certified Ethical Hacker (CEH))
Questions et réponses: 878 Q&As
Code d'Examen: CTIL
Nom d'Examen: GAQM (Certified Software Tester - Intermediate Level (CSTIL))
Questions et réponses: 25 Q&As
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NO.1 Rebecca is a security analyst and knows of a local root exploit that has the ability to enable
local users to use available exploits to gain root privileges. This vulnerability exploits a condition in
the Linux kernel within the execve() system call. There is no known workaround that exists for this
vulnerability. What is the correct action to be taken by Rebecca in this situation as a
recommendation to management?
A. Rebecca should make a recommendation to disable the () system call
B. Rebecca should make a recommendation to upgrade the Linux kernel promptly
C. Rebecca should make a recommendation to set all child-process to sleep within the execve()
D. Rebecca should make a recommendation to hire more system administrators to monitor all child
processes to ensure that each child process can't elevate privilege
Answer: B
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NO.2 Which are true statements concerning the BugBear and Pretty Park worms?
Select the best answers.
A. Both programs use email to do their work.
B. Pretty Park propagates via network shares and email
C. BugBear propagates via network shares and email
D. Pretty Park tries to connect to an IRC server to send your personal passwords.
E. Pretty Park can terminate anti-virus applications that might be running to bypass them.
Answer: A,C,D
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Explanation:
Both Pretty Park and BugBear use email to spread. Pretty Park cannot propagate via network shares,
only email. BugBear propagates via network shares and email. It also terminates anti-virus
applications and acts as a backdoor server for someone to get into the infected machine. Pretty Park
tries to connect to an IRC server to send your personal passwords and all sorts of other information
it retrieves from your PC. Pretty Park cannot terminate anti-virus applications. However, BugBear
can terminate AV software so that it can bypass them.
NO.3 Rebecca has noted multiple entries in her logs about users attempting to connect on ports
that are either not opened or ports that are not for public usage. How can she restrict this type of
abuse by limiting access to only specific IP addresses that are trusted by using one of the built-in
Linux Operating System tools?
A. Ensure all files have at least a 755 or more restrictive permissions.
B. Configure rules using ipchains.
C. Configure and enable portsentry on his server.
D. Install an intrusion detection system on her computer such as Snort.
Answer: B
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Explanation:
ipchains is a free software based firewall for Linux. It is a rewrite of Linux's previous IPv4 firewalling
code, ipfwadm. In Linux 2.2, ipchains is required to administer the IP packet filters. ipchains was
written because the older IPv4 firewall code used in Linux
2.0 did not work with IP fragments and didn't allow for specification of protocols other than TCP ,
UDP , and ICMP .
NO.4 Under what conditions does a secondary name server request a zone transfer from a primary
name server?
A. When a primary SOA is higher that a secondary SOA
B. When a secondary SOA is higher that a primary SOA
C. When a primary name server has had its service restarted
D. When a secondary name server has had its service restarted
E. When the TTL falls to zero
Answer: A
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NO.5 Assuring two systems that are using IPSec to protect traffic over the internet, what type of
general attack could compromise the data?
A. Spoof Attack
B. Smurf Attack
C. Man inthe Middle Attack
D. Trojan Horse Attack
E. Back Orifice Attack
Answer: D,E
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Explanation:
To compromise the data, the attack would need to be executed before the encryption takes place at
either end of the tunnel. Trojan Horse and Back Orifice attacks both allow for potential data
manipulation on host computers. In both cases, the data would be compromised either before
encryption or after decryption, so IPsec is not preventing the attack.
NO.6 What is the proper response for a NULL scan if the port is closed?
A. SYN
B. ACK
C. FIN
D. PSH
E. RST
F. No response
Answer: E
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Explanation:
Closed ports respond to a NULL scan with a reset.
NO.7 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?
A. The firewall is blocking port 23 to that system
B. He needs to use an automated tool to telnet in
C. He cannot spoof his IP and successfully use TCP
D. He is attacking an operating system that does not reply to telnet even when open
Answer: C
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NO.8 You visit a website to retrieve the listing of a company's staff members. But you can not find it
on the website. You know the listing was certainly present one year before. How can you retrieve
information from the outdated website?
A. Through Google searching cached files
B. Through Archive.org
C. Download the website and crawl it
D. Visit customers' and prtners' websites
Answer: B
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Explanation:
Archive.org mirrors websites and categorizes them by date and month depending on the crawl time.
Archive.org dates back to 1996, Google is incorrect because the cache is only as recent as the latest
crawl, the cache is over-written on each subsequent crawl. Download the website is incorrect
becausethat's the same as what you see online. Visiting customer partners websites is just bogus.
The answer is then Firmly, C, archive.org
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