Fundamentals of InfoSecintermediate
A service becomes unreachable after an attacker consumes its resources, but there is no evidence that data was read or changed. Identify the main security goal affected and explain why.
Answer
Availability is the main goal affected because authorized users cannot access the service when they need it. The facts do not establish a confidentiality breach or an integrity breach. Resource exhaustion is consistent with denial of service.
Explanation
### The concept
Availability concerns whether authorized users can access usable information and services when needed. If resource consumption makes a service unreachable, availability is affected even when the incident does not disclose or alter information. A denial-of-service attack aims to prevent or disrupt access. The facts given do not prove that confidentiality or integrity was also compromised, although real incidents can affect more than one goal.
### What a good answer covers
- Identify availability as the primary affected goal.
- Connect unreachability to loss of access when needed.
- Distinguish the event from disclosure or unauthorized change.
- Recognize resource exhaustion as consistent with denial of service.
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