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Question 440 - CAS-004 discussion

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An organization is designing a MAC scheme (or critical servers running GNU/Linux. The security engineer is investigating SELinux but is confused about how to read labeling contexts. The engineer executes the command stat ./secretfile and receives the following output:

Which of the following describes the correct order of labels shown in the output above?

A.
Role, type MLS level, and user identity
Answers
A.
Role, type MLS level, and user identity
B.
Role, user identity, object, and MLS level
Answers
B.
Role, user identity, object, and MLS level
C.
Object MLS level, role, and type
Answers
C.
Object MLS level, role, and type
D.
User identity, role, type, and MLS level
Answers
D.
User identity, role, type, and MLS level
E.
Object, user identity, role, and MLS level
Answers
E.
Object, user identity, role, and MLS level
Suggested answer: D

Explanation:

SELinux contexts are typically made up of several components, including the user identity, role, type (also known as domain or type), and MLS (Multi-Level Security) level. The context format is user:role:type:level. In the given output sys:secret:sec_t:s0, 'sys' represents the user identity, 'secret' is the role, 'sec_t' is the type, and 's0' is the MLS level. Understanding SELinux contexts is critical for managing Mandatory Access Control (MAC) in GNU/Linux systems to protect against unauthorized access.

asked 02/10/2024
Jay Fletcher
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