Which component of the IT Security Model is attacked with eavesdropping and interception?

Eavesdropping and interception primarily attack the confidentiality component of the IT Security

Model. Confidentiality is concerned with protecting information from being accessed by

unauthorized parties. Eavesdropping involves listening to private communication or capturing data

as it is transmitted over a network, thereby breaching the confidentiality of the information.

Reference:

William Stallings, "Cryptography and Network Security: Principles and Practice".