PT0-002 Practice Test 3 — 30 Questions

Question 1

A penetration tester is using a vulnerability scanner to assess a web application. The scanner reports a 'SQL Injection' finding with a high confidence level. However, manual verification of the same payload does not trigger the vulnerability in a browser. Which of the following is the most likely reason for this discrepancy?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

The scanner might have generated a false positive due to a misinterpretation of the server's response. The most likely reason is that the scanner generated a false positive due to a misinterpretation of the server's response. Vulnerability scanners often infer SQL injection based on response patterns (e.g., database error messages, timing differences) that may not actually be exploitable. Manual verification in a browser failed because the payload did not produce a true SQL error or data leak, confirming the scanner's alert was incorrect.

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The scanner used a different HTTP method than the one used in manual testing

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The scanner's payloads were URL-encoded differently

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The vulnerability exists only in the scanner's simulated environment

Question 2

A client requires a penetration test of their web application that uses Single Sign-On (SSO) with a third-party identity provider. The client is concerned that testing could lock out real user accounts and disrupt operations. Which of the following should be included in the rules of engagement to address this concern?

Accepted Answer

Provide test accounts that are excluded from lockout policies. Providing test accounts that are excluded from lockout policies allows the penetration tester to thoroughly assess the SSO authentication mechanism—including the SAML or OIDC flows—without risking the lockout of real user accounts. This directly addresses the client's operational concern while still enabling comprehensive testing of the identity provider integration.

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Prohibit all testing of the authentication mechanism

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Only perform testing during business hours

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Require the tester to use only passive reconnaissance techniques

Question 3

During a penetration test, a tester finds a custom binary that is vulnerable to a stack-based buffer overflow. The binary has DEP enabled but no ASLR. Which of the following exploitation techniques would be MOST effective to achieve code execution?

Accepted Answer

ret2libc to call system() with a controlled argument. Ret2libc allows the tester to call the system() function from libc with a controlled argument (e.g., "/bin/sh") to spawn a shell, bypassing DEP (which prevents code execution on the stack) without needing to execute shellcode. Since ASLR is disabled, the address of system() and the string "/bin/sh" in libc are predictable, making this technique reliable and effective.

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Return-oriented programming (ROP) to bypass DEP

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Heap spraying to inject shellcode

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Stack pivoting to redirect execution to a known location

Question 4

A penetration tester wants to identify the web server software and version used by a target organization without sending any packets to the target's infrastructure. Which of the following techniques is most effective for this purpose?

Accepted Answer

Use Shodan to search for the target's IP address or domain and review the gathered banners.. Shodan is a search engine that continuously scans the internet and stores service banners from various ports. By querying the target's IP address or domain, the penetration tester can retrieve previously collected HTTP headers and other service banners without sending any packets to the target, thus achieving passive reconnaissance.

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Perform a DNS zone transfer to obtain internal server information.

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Use netcat to connect to port 80 and read the HTTP banner.

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Use nmap -sV with a delayed scan to avoid detection.

Question 5

A penetration tester is analyzing a Python script that uses the 'requests' library. The script sends a GET request to a target URL with a crafted parameter value containing a SQL sleep function, then measures the response time. What attack is the script most likely performing?

Accepted Answer

Blind time-based SQL injection.. The script sends a crafted parameter containing a SQL sleep function (e.g., `' OR SLEEP(5)--`) and measures the response time. If the database executes the sleep, the response is delayed, confirming a SQL injection vulnerability without relying on visible output. This is the hallmark of a blind time-based SQL injection attack using the `requests` library to time the HTTP response.

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Cross-site scripting (XSS) attack.

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Command injection attack.

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Error-based SQL injection.

Question 6

A penetration tester is analyzing the results of a vulnerability scan against a web application. The scanner reports a potential SQL injection vulnerability in a login form parameter. However, manual testing with the same payload does not produce any error messages or changes in behavior. Which of the following is the most likely reason for the false positive?

Accepted Answer

The web application is using a parameterized query that sanitizes input. The use of parameterized queries (prepared statements) separates SQL logic from user input, preventing SQL injection even if the input contains malicious payloads. The scanner's payload triggered a false positive because the application's database layer safely handles the input, so no error or behavioral change occurs during manual testing.

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The scanner used a payload that was not URL-encoded

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The scanning engine is outdated and does not support the latest SQL syntax

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The login form is protected by a CAPTCHA that blocks automated scanning

Question 7

A penetration tester has gained access to a Windows workstation and extracted NTLM password hashes. The tester wants to move laterally to a server that authenticates using NTLM. The tester does not have the plaintext passwords. Which technique is MOST appropriate to authenticate to the server using the captured hashes?

Accepted Answer

Pass-the-hash. Pass-the-hash (PtH) is the correct technique because it allows the tester to authenticate to the remote server using the captured NTLM hash directly, without needing the plaintext password. NTLM authentication uses a challenge-response protocol where the hash itself is the secret; by presenting the hash in the response, the tester can impersonate the user. This is a well-known lateral movement technique in Windows environments, often executed with tools like Mimikatz (sekurlsa::pth) or Impacket's wmiexec.py.

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Brute force

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Rainbow tables

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Keylogging

Question 8

A client is planning a penetration test of their internal network but refuses to provide network diagrams or access to a staging environment. The tester is concerned about causing a denial of service (DoS) on critical systems. Which clause should be included in the rules of engagement to mitigate this risk?

Accepted Answer

A rate-limiting clause that restricts scan speed and concurrent connections.. A rate-limiting clause directly addresses the risk of causing a denial of service (DoS) by controlling the speed and concurrency of the penetration test. By restricting scan rates (e.g., using tools like Nmap with `--max-rate` or `--min-hostgroup`) and limiting concurrent connections, the tester can prevent overwhelming critical systems, even without network diagrams or a staging environment. This clause mitigates the risk without requiring the client to provide additional information or shifting liability.

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A clause requiring the client to provide a complete list of in-scope IP addresses.

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A waiver stating that any service disruption is the client's responsibility.

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An exclusion list for systems that should not be tested.

Question 9

A penetration tester has compromised a Linux server and gained a low-privilege shell. The tester discovers that the /etc/shadow file is readable by the tester's user. Which attack is most directly enabled by this finding?

Accepted Answer

Password cracking offline. The /etc/shadow file contains the hashed passwords for all users on the system. If a low-privilege user can read this file, they can copy the password hashes and attempt to crack them offline using tools like John the Ripper or Hashcat. This directly enables an offline password cracking attack, as the tester can brute-force or use dictionary attacks against the hashes without needing to interact with the live system.

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Pass-the-hash

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LLMNR poisoning

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Kerberoasting

Question 10

A penetration tester wants to identify all publicly accessible Amazon S3 buckets that belong to a specific organization. Which technique is most effective for passive reconnaissance?

Accepted Answer

Use Google dorks to search for bucket names and URLs.. Google dorks (e.g., site:s3.amazonaws.com "companyname") allow a penetration tester to passively discover publicly accessible S3 bucket names and URLs indexed by search engines without sending any traffic to the target organization. This technique leverages existing search engine caches, making it purely passive and highly effective for identifying misconfigured buckets that have been crawled.

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Send DNS queries for common bucket name prefixes.

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Use nmap to scan all AWS IP ranges for open ports.

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Perform a DNS zone transfer on the target organization's domain.

Question 11

A penetration tester is exploiting a Linux system that has ASLR enabled but no stack canaries. The vulnerability is a classic stack-based buffer overflow. Which of the following is the most effective method to achieve code execution?

Accepted Answer

Return to the PLT entry for system(). With ASLR enabled, direct shellcode injection fails due to randomized stack addresses, but the PLT entry for system() has a fixed, known address in the binary. Since there are no stack canaries, a simple buffer overflow can overwrite the return address to jump directly to system() in the PLT, passing a pointer to a command string (e.g., "/bin/sh") already in memory, achieving code execution without needing to know runtime addresses.

Answer

Prepend a NOP sled and inject shellcode into the buffer

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Return-to-libc (ret2libc)

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Use a ROP chain to bypass ASLR and execute shellcode

Question 12

A penetration tester has obtained a TGT from a domain controller by cracking the krbtgt hash. Which attack can the tester now perform to gain persistent administrative access to any resource in the domain?

Accepted Answer

Golden Ticket. A Golden Ticket attack is the correct answer because the tester has cracked the krbtgt hash, which is the key used by the Key Distribution Center (KDC) to sign all Ticket Granting Tickets (TGTs). With this hash, the tester can forge a TGT for any user (including a domain admin) with an arbitrary long validity period, granting persistent administrative access to any resource in the domain without needing to interact with the domain controller again.

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Pass-the-Hash

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Silver Ticket

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DCSync

Question 13

During a penetration test, a tester has access to a Windows domain-joined machine. The tester finds that the machine is running a service that uses named pipes for interprocess communication. The tester wants to perform a relay attack to capture authentication credentials. Which of the following conditions is necessary for an SMB relay attack to succeed?

Accepted Answer

SMB signing must be disabled or not enforced. SMB relay attacks work by intercepting an authentication attempt and forwarding it to a target server. For the relay to succeed, the target server must not require SMB signing, because signing ensures that the relayed authentication packet is cryptographically bound to the original session, preventing the attacker from replaying it. When SMB signing is disabled or not enforced, the relayed authentication is accepted as valid, allowing credential capture.

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The attacker must be on the same subnet

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The target must have a publicly available SMB share

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The attacker must have admin privileges on the relay machine

Question 14

A penetration tester is performing internal reconnaissance on a network that uses IPv6. The tester wants to discover alive hosts and their IPv6 addresses without sending many packets. Which technique is most effective for this purpose?

Accepted Answer

Ping the IPv6 all-nodes multicast address (ff02::1) and analyze the responses to discover active hosts. Sending a ping to the IPv6 all-nodes multicast address (ff02::1) triggers a response from all active hosts on the local link that have IPv6 enabled, allowing the tester to discover alive hosts and their IPv6 addresses with minimal packets. This technique leverages the inherent multicast behavior of IPv6, where hosts join the all-nodes multicast group by default, making it highly efficient for reconnaissance without scanning each address individually.

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Perform a full TCP SYN scan on the entire /64 subnet using Nmap with IPv6 addressing

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Request the DHCPv6 server log from the network administrator to obtain a list of assigned IPv6 addresses

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Use the `ip neighbor` command on the tester's machine to view the IPv6 neighbor cache after generating traffic

Question 15

A penetration tester is performing reconnaissance on a target domain. The tester queries the public DNS records and finds an SPF record that includes an 'include' mechanism pointing to a third-party email service. Which technique can the tester use to potentially discover more subdomains or internal infrastructure?

Accepted Answer

Query the TXT records of the third-party domain. The SPF record's 'include' mechanism points to a third-party email service, which itself may have SPF or other TXT records that reveal additional domains or subdomains used for email infrastructure. By querying the TXT records of the third-party domain, the tester can discover these included domains, potentially expanding the attack surface. This technique leverages the recursive nature of SPF includes to map out related infrastructure.

Answer

Perform a DNS zone transfer

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Enumerate MX records for the third-party

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Use Google dorks to find exposed email addresses

Question 16

A penetration tester discovers that a web application uses a vulnerable Java deserialization endpoint. The classpath includes the Apache Commons Collections library. Which attack technique is most likely to achieve remote code execution?

Accepted Answer

Java deserialization of untrusted data (RCE via Commons Collections).. The presence of the Apache Commons Collections library in the classpath, combined with a vulnerable Java deserialization endpoint, enables the classic 'gadget chain' attack. Attackers craft a malicious serialized object that, when deserialized, invokes methods in Commons Collections (e.g., InvokerTransformer) to execute arbitrary system commands, achieving remote code execution (RCE). This is a well-documented exploit chain (e.g., CVE-2015-7501) that directly leverages the library's reflection-based classes.

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SQL injection.

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Cross-site scripting.

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Command injection.

Question 17

During a penetration test, the tester identifies a low-risk information disclosure vulnerability in a public-facing web server. The tester includes this finding in the final report. Which component of the risk rating should the tester use to justify the low severity?

Accepted Answer

CVSS base score. The CVSS base score is the correct component to justify the low severity because it represents the intrinsic and fundamental characteristics of a vulnerability that are constant over time and across user environments. In this case, the information disclosure vulnerability has a low base score due to factors such as low attack complexity and low impact on confidentiality, which are captured in the base metrics. The base score is the standard starting point for communicating severity, making it the appropriate justification for the low-risk rating in the report.

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Exploitability metrics

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Impact metrics

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Temporal score

Question 18

A penetration testing firm is contracted to test a cloud-based infrastructure. The client uses a shared responsibility model. Which of the following should be clarified in the rules of engagement to avoid legal issues?

Accepted Answer

Whether the tester needs authorization from the cloud provider. In a shared responsibility model, the cloud provider is responsible for the security of the cloud, while the customer is responsible for security in the cloud. However, penetration testing activities may violate the cloud provider's terms of service or acceptable use policy, potentially triggering legal action. Therefore, obtaining explicit authorization from the cloud provider is critical to ensure the tester's actions are legally permitted and to avoid liability for unauthorized access under laws like the Computer Fraud and Abuse Act (CFAA).

Answer

Who is responsible for patching the operating system

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The encryption method for data at rest

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The backup strategy for logs

Question 19

A client wants to test a web application that uses multiple third-party APIs for payment processing, shipping, and customer relationship management. The client states that the APIs are critical for operations but cannot be taken offline. Which scoping consideration is most important to include in the rules of engagement?

Accepted Answer

The tester must use only non-intrusive scanning techniques on the APIs.. The client explicitly stated that the APIs are critical for operations and cannot be taken offline. Non-intrusive scanning techniques, such as passive traffic analysis or read-only API calls with safe HTTP methods (GET, HEAD), minimize the risk of service disruption, data corruption, or rate-limit triggering. This aligns with the scoping requirement to maintain availability while still allowing security testing of the API layer.

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The tester must exclude all API endpoints from testing.

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The tester must coordinate testing schedules with the API vendors.

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The tester must provide a list of all API calls to be made prior to testing.

Question 20

A penetration tester is conducting passive reconnaissance on a target organization. The tester wants to identify the technologies and frameworks used by the target's web application without making any requests to the target's servers. Which resource is BEST suited for this task?

Accepted Answer

BuiltWith.com. BuiltWith.com is a passive reconnaissance resource that profiles web application technologies by analyzing publicly available data, such as JavaScript libraries, web frameworks, and analytics tools, without sending any requests to the target's servers. It aggregates information from various public sources and historical data, making it ideal for identifying technologies without direct interaction.

Answer

Nmap service scan with -sV

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Shodan.io

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Wappalyzer browser extension