The best next step is to review scanner account permissions, allowed authentication methods, and sudo command restrictions. This is correct because SSH hardening—such as disabling password authentication, enforcing key-based login, or restricting ciphers—directly disrupts the authentication and privilege escalation paths a credentialed scanner relies on. If the scanner’s account lacks the correct sudoers entries or its allowed authentication method conflicts with the hardened SSH configuration, the scan will fail. On the CompTIA CySA+ CS0-003 exam, this scenario tests your ability to troubleshoot post-hardening scan failures without reverting security controls. A common trap is immediately downgrading the SSH hardening finding; instead, you must align the scanner’s configuration with the new security posture. Remember the mnemonic “PAS” for Permissions, Authentication methods, and Sudo restrictions—check these three before touching the hardening policy.
CS0-003 Vulnerability Management Practice Question
This CS0-003 practice question tests your understanding of vulnerability management. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. A key principle to apply: credentialed scans provide deeper vulnerability assessment than unauthenticated scans.. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A credentialed Linux scan fails on several hosts after SSH hardening. What is the BEST next step? For validation, Which action should be taken before closing or downgrading the finding?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Option D is correct because SSH hardening (e.g., disabling password authentication, restricting ciphers, or enforcing key-based login) can break credentialed scans if the scanner's account permissions, allowed authentication methods, or sudo command restrictions are not aligned with the new configuration. Reviewing these settings ensures the scanner can authenticate and execute privileged commands, restoring scan coverage without compromising security.
Key principle: Credentialed scans provide deeper vulnerability assessment than unauthenticated scans.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
Credentialed scans depend on authentication and sufficient read access to inspect packages and configuration.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Credentialed scans provide deeper vulnerability assessment than unauthenticated scans.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that a scan failure after hardening means the hosts are secure, when in reality the failure is a connectivity or authentication issue that must be resolved to maintain visibility.
Detailed technical explanation
How to think about this question
Credentialed Linux scans typically use SSH with public key authentication or password-based login, and may require sudo access to execute commands like 'rpm -qa' or 'dpkg -l' for patch enumeration. SSH hardening often involves disabling root login, restricting allowed authentication methods (e.g., PubkeyAuthentication only), or setting 'PermitRootLogin prohibit-password', which can block the scanner's account if it relies on password authentication or direct root access. In real-world scenarios, a common subtlety is that the scanner's sudoers entry may need NOPASSWD for specific commands, or the scanner's SSH key must be added to the target's authorized_keys file with the correct permissions (600) and ownership.
KKey Concepts to Remember
Credentialed scans provide deeper vulnerability assessment than unauthenticated scans.
SSH hardening often changes authentication methods and user permissions.
Scanner accounts require specific SSH key, authentication method, and sudo privileges.
Insufficient scanner permissions lead to failed or incomplete credentialed scan results.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Credentialed scans provide deeper vulnerability assessment than unauthenticated scans.
Real-world example
How this comes up in practice
A developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CS0-003 question in full detail.
Review credentialed scans provide deeper vulnerability assessment than unauthenticated scans., then practise related CS0-003 questions on the same topic to reinforce the concept.
Vulnerability Management — This question tests Vulnerability Management — Credentialed scans provide deeper vulnerability assessment than unauthenticated scans..
What is the correct answer to this question?
The correct answer is: Review scanner account permissions, allowed authentication methods, and sudo command restrictions — Option D is correct because SSH hardening (e.g., disabling password authentication, restricting ciphers, or enforcing key-based login) can break credentialed scans if the scanner's account permissions, allowed authentication methods, or sudo command restrictions are not aligned with the new configuration. Reviewing these settings ensures the scanner can authenticate and execute privileged commands, restoring scan coverage without compromising security.
What should I do if I get this CS0-003 question wrong?
Review credentialed scans provide deeper vulnerability assessment than unauthenticated scans., then practise related CS0-003 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Credentialed scans provide deeper vulnerability assessment than unauthenticated scans.
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Question Discussion
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