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Question 44 - CAS-004 discussion

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During a system penetration test, a security engineer successfully gained access to a shell on a Linux host as a standard user and wants to elevate the privilege levels.

Which of the following is a valid Linux post-exploitation method to use to accomplish this goal?

A.
Spawn a shell using sudo and an escape string such as sudo vim -c '!sh'.
Answers
A.
Spawn a shell using sudo and an escape string such as sudo vim -c '!sh'.
B.
Perform ASIC password cracking on the host.
Answers
B.
Perform ASIC password cracking on the host.
C.
Read the /etc/passwd file to extract the usernames.
Answers
C.
Read the /etc/passwd file to extract the usernames.
D.
Initiate unquoted service path exploits.
Answers
D.
Initiate unquoted service path exploits.
E.
Use the UNION operator to extract the database schema.
Answers
E.
Use the UNION operator to extract the database schema.
Suggested answer: A

Explanation:

Spawning a shell using sudo and an escape string is a valid Linux post-exploitation method that can exploit a misconfigured sudoers file and allow a standard user to execute commands as root. ASIC password cracking is used to break hashed passwords, not to elevate privileges. Reading the /etc/passwd file may reveal usernames, but not passwords or privileges. Unquoted service path exploits are applicable to Windows systems, not Linux. Using the UNION operator is a SQL injection technique, not a Linux post-exploitation method. Verified

Reference: https://www.comptia.org/blog/what-is-post-exploitation https://partners.comptia.org/docs/default-source/resources/casp-content-guide

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asked 02/10/2024
José Santos
32 questions
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