The answer is that the bucket is configured for public read access, which is the primary security concern. This is because the bucket policy explicitly grants `s3:GetObject` to `Principal: "*"` with `Effect: "Allow"`, meaning any unauthenticated user on the internet can read all objects stored in the bucket, leading to a classic misconfiguration that exposes sensitive data. On the CISA exam, this scenario tests your ability to identify the most immediate risk in an S3 bucket policy, often as a distractor alongside controls like encryption or versioning—but the core issue is unauthorized data disclosure via public read. A common trap is focusing on technical details like encryption status rather than the explicit permission for anonymous access. Remember the memory tip: “Star in Principal equals public exposure”—if you see `"Principal": "*"` with an Allow effect, the bucket is wide open.
CISA Protection of Information Assets Practice Question
This CISA practice question tests your understanding of protection of information assets. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. 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.
Exhibit
Refer to the exhibit.
Exhibit:
Configuration file for an Amazon S3 bucket policy:
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": "*",
"Action": "s3:GetObject",
"Resource": "arn:aws:s3:::example-bucket/*"
}
]
}
Refer to the exhibit. A CISA is reviewing this S3 bucket policy. What is the PRIMARY security concern?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "primary"
Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The bucket is configured for public read access
The bucket policy explicitly grants `s3:GetObject` to `Principal: "*"` with `Effect: "Allow"`, which means any unauthenticated user on the internet can read objects in the bucket. This is a classic misconfiguration that leads to public read access, exposing sensitive data. While encryption and versioning are important security controls, the immediate and most severe risk is unauthorized data disclosure via public read.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
The bucket is configured for public read access
Why this is correct
The policy grants anonymous read access to all objects.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Encryption is not enforced on the bucket
Why it's wrong here
Encryption is not addressed in this policy.
✗
The policy allows unauthorized write access
Why it's wrong here
The policy only allows GetObject (read), not write.
✗
Versioning is not enabled on the bucket
Why it's wrong here
Versioning is not indicated in the policy.
Common exam traps
Common exam trap: answer the scenario, not the keyword
ISACA often tests the distinction between 'public read' and 'public write' — candidates may incorrectly assume the policy allows write access because it uses `"*"`, but the action is specifically `s3:GetObject`, so only read is permitted.
Detailed technical explanation
How to think about this question
Under the hood, S3 bucket policies are evaluated before IAM policies, and a `Principal: "*"` with `Effect: "Allow"` on `s3:GetObject` effectively disables all access controls for anonymous users, bypassing any bucket ACLs or block public access settings if not explicitly overridden. In real-world scenarios, this misconfiguration has led to massive data breaches (e.g., 2017 Accenture leak) where sensitive customer data was scraped by automated crawlers. The `Condition` block is absent, so there is no IP restriction or Referer header check to limit access.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
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
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the CISA exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Protection of Information Assets — This question tests Protection of Information Assets — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The bucket is configured for public read access — The bucket policy explicitly grants `s3:GetObject` to `Principal: "*"` with `Effect: "Allow"`, which means any unauthenticated user on the internet can read objects in the bucket. This is a classic misconfiguration that leads to public read access, exposing sensitive data. While encryption and versioning are important security controls, the immediate and most severe risk is unauthorized data disclosure via public read.
What should I do if I get this CISA question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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