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Question 27 - PCCSE discussion

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An S3 bucket within AWS has generated an alert by violating the Prisma Cloud Default policy ''AWS S3 buckets are accessible to public''. The policy definition follows:

config where cloud.type = 'aws' AND api.name='aws-s3api-get-bucket-acl' AND json.rule='((((acl.grants[? (@.grantee=='AllUsers')] size > 0) or policyStatus.isPublic is true) and publicAccessBlockConfiguration does not exist) or ((acl.grants[?(@.grantee=='AllUsers')] size > 0) and publicAccessBlockConfiguration.ignorePublicAcis is false) or (policyStatus.isPublic is true and publicAccessBlockConfiguration.restrictPublicBuckets is false)) and websiteConfiguration does not exist'

Why did this alert get generated?

A.
an event within the cloud account
Answers
A.
an event within the cloud account
B.
network traffic to the S3 bucket
Answers
B.
network traffic to the S3 bucket
C.
configuration of the S3 bucket
Answers
C.
configuration of the S3 bucket
D.
anomalous behaviors
Answers
D.
anomalous behaviors
Suggested answer: C

Explanation:

The alert 'AWS S3 buckets are accessible to public' is generated due to the configuration of the S3 bucket, which has been set in a way that allows public access. The policy definition provided checks for various conditions that would make an S3 bucket publicly accessible, such as grants to 'AllUsers', the absence of a 'publicAccessBlockConfiguration', or specific configurations that do not restrict public access. Therefore, the alert is triggered by the configuration settings of the S3 bucket that violate the policy's criteria for public accessibility.

asked 23/09/2024
Meriem Jlassi
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