CompTIA Exam PT0-003 Topic 2 Question 9 Discussion

Actual exam question for CompTIA's PT0-003 exam

Question #: 9
Topic #: 2

A penetration tester performs a service enumeration process and receives the following result after scanning a server using the Nmap tool:

PORT STATE SERVICE

22/tcp open ssh

25/tcp filtered smtp

111/tcp open rpcbind

2049/tcp open nfs

Based on the output, which of the following services provides the best target for launching an attack?

ADatabase

BRemote access

CEmail

DFile sharing
Based on the Nmap scan results, the services identified on the target server are as follows:
22/tcp open ssh:
Service: SSH (Secure Shell)
Function: Provides encrypted remote access.
Attack Surface: Brute force attacks or exploiting vulnerabilities in outdated SSH implementations. However, it is generally considered secure if properly configured.
25/tcp filtered smtp:
Service: SMTP (Simple Mail Transfer Protocol)
Function: Email transmission.
Attack Surface: Potential for email-related attacks such as spoofing, but the port is filtered, indicating that access may be restricted or protected by a firewall.
111/tcp open rpcbind:
Service: RPCBind (Remote Procedure Call Bind)
Function: Helps in mapping RPC program numbers to network addresses.
Attack Surface: Can be exploited in specific configurations, but generally not a primary target compared to others.
2049/tcp open nfs:
Service: NFS (Network File System)
Function: Allows for file sharing over a network.
Attack Surface: NFS can be a significant target for attacks due to potential misconfigurations that can allow unauthorized access to file shares or exploitation of vulnerabilities in NFS services.
Conclusion: The NFS service (2049/tcp) provides the best target for launching an attack. File sharing services like NFS often contain sensitive data and can be vulnerable to misconfigurations that allow unauthorized access or privilege escalation.

Show Suggested Answer

Suggested Answer: D

by Elinore at Sep 13, 2024, 06:23 AM

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Claudia

2 months ago

Haha, good luck trying to crack that NFS service. I bet the system admin has it locked down tighter than a drum. Might as well just give up now.

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King

2 months ago

I don't know, that SMTP port being filtered makes me a little suspicious. Maybe there's some juicy info hiding in those email logs.

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I think the best target for launching an attack is the NFS service.

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