cis-aws-storage-2-9

name	cis-aws-storage-2.9
description	Ensure Granular Policy Creation
category	cis-storage-services
version	1.0.0
author	cyberstrike-official
tags	["cis","aws","storage","iam","iam-policy","least-privilege","granular-access"]
cis_id	2.9
cis_benchmark	CIS AWS Storage Services Benchmark v1.0.0
tech_stack	["aws"]
cwe_ids	["CWE-284"]
chains_with	["cis-aws-storage-2.8","cis-aws-storage-2.10"]
prerequisites	[]
severity_boost	{}

CIS Control 2.9: Ensure Granular Policy Creation (Manual)

Profile Applicability

• Level 2

Description

Granular policies are meticulously tailored to AWS resources, ensuring precision in access control measures.

Rationale

Emphasizing granular policies in AWS ensures that access control measures are precisely aligned with the requirements of each resource, bolstering security and minimizing unauthorized access. By tailoring policies to specific resources, organizations can adhere more closely to the principle of least privilege, mitigating risks and maintaining compliance with regulatory standards.

Audit Procedure

Via AWS CLI

```bash

Review IAM policies for granularity

aws iam list-policies --scope Local

Examine policy document

aws iam get-policy-version
--policy-arn <POLICY_ARN>
--version-id <VERSION_ID> ```

Remediation

Review existing IAM policies to identify those that are overly broad or lack granularity. Refine these policies to restrict permissions to only the resources and actions necessary for each user or group.

References

1. IAM Policy Tags

CIS Controls

Controls Version	Control	IG 1	IG 2	IG 3
v8	6.8 Define and Maintain Role-Based Access Control			●
v7	16.2 Configure Centralized Point of Authentication		●	●