Account does not block public sharing of EBS snapshots

Severity: High
Service: EC2
Check ID: EBS_SNAPSHOT_PUBLIC_ACCESS_NOT_BLOCKED

What this check finds

EBS snapshot block public access is set to "unblocked" for this account, so any snapshot can be shared publicly. The per-snapshot check only sees snapshots that exist today; this default governs every snapshot created from now on, including by automation nobody is watching.

Passing looks like: Account blocks public EBS snapshot sharing.

How to fix it

Enable snapshot block public access.

AWS CLI

aws ec2 enable-snapshot-block-public-access --state block-all-sharing

Names in capitals are placeholders for your own resource. Review a command before you run it.

AWS console

EC2 → EC2 Dashboard → Data protection and security → Block public access for EBS snapshots → Edit.

Compliance controls it is evidence for

A failing result counts against these controls in KloudLytics; a passing one is evidence towards them. How compliance mapping works

Compliance controls mapped to Account does not block public sharing of EBS snapshots
Framework	Controls
NIST SP 800-53 Rev5 (Moderate)	AC-3 Access Enforcement SC-7 Boundary Protection
NIST Cybersecurity Framework 2.0	PR.AA-05 Access permissions and authorizations are enforced with least privilege PR.IR-01 Networks and environments are protected from unauthorized logical access and usage
ISO/IEC 27001:2022 Annex A	A.5.15 Access control A.8.20 Networks security

Checked on every scan

KloudLytics runs this check each time it scans a connected AWS account, through a read-only role, and lists every affected resource with its region. On Pro and Business a fix is written for the specific resource rather than the general case above. The exact access it needs

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