hardMultiple ChoiceObjective-mapped
CISM Practice Question: Refer to the exhibit
Exhibit
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": "*",
"Action": "s3:GetObject",
"Resource": "arn:aws:s3:::company-reports/*",
"Condition": {
"IpAddress": {
"aws:SourceIp": "10.0.0.0/8"
}
}
},
{
"Effect": "Allow",
"Principal": "*",
"Action": "s3:PutObject",
"Resource": "arn:aws:s3:::company-reports/*"
}
]
}Refer to the exhibit. Based on the exhibit, what is the security implication of this cloud storage bucket policy?
⚠ Common exam trap
This question tests the distinction between explicit Deny with IP conditions and unrestricted Allow actions, where candidates mistakenly think a Deny on one action applies globally or that a missing Condition implies no access, rather than understanding that each action is evaluated independently.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Allows only users from 10.0.0.0/8 to read and write
The bucket policy includes a Condition block with NotIpAddress for both read and write actions, denying access from IP addresses outside the 10.0.0.0/8 range. This restricts both read and write operations to users from the internal network, making Option B correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Denies all access except from 10.0.0.0/8
Why it's wrong here
Ly states that all access is denied except from the range; the policy allows access from the range for both read and write.
- ✓
Allows only users from 10.0.0.0/8 to read and write
Why this is correct
Correct. The policy uses a Condition to deny read and write for IPs outside 10.0.0.0/8, effectively allowing only users from that range to read and write.
- ✗
Allows any authenticated user to read and write objects
Why it's wrong here
Incorrect. The policy restricts access to the internal network, not to any authenticated user.
- ✗
Allows any user from internal network to read objects, but any user can write objects from anywhere
Why it's wrong here
Incorrect. Write access is also restricted to the internal network, not open to anyone from anywhere.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CISM practice question is part of Courseiva's free ISACA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CISM exam.