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macOS post-exploitation for credential harvesting, DTrace monitoring, TCC bypass, and stealth operations via native tools
Windows userland post-exploitation for credential harvesting, monitoring, AMSI/ETW bypass, and stealth operations
Kubernetes post-exploitation for container escape, secret extraction, RBAC abuse, and cluster persistence
基于 SOC 职业分类
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| name | cis-aws-storage-3.11 |
| description | Ensure accessing Points and IAM Policies for EFS |
| category | cis-storage-services |
| version | 1.0.0 |
| author | cyberstrike-official |
| tags | ["cis","aws","storage","efs","iam","access-points","elasticfilesystem","access-control"] |
| cis_id | 3.11 |
| cis_benchmark | CIS AWS Storage Services Benchmark v1.0.0 |
| tech_stack | ["aws"] |
| cwe_ids | [] |
| chains_with | ["cis-aws-storage-3.10"] |
| prerequisites | [] |
| severity_boost | {} |
You can use IAM policies to control access to your EFS access points. To achieve this, utilize the elasticfilesystem:AccessPointArn IAM condition key. The AccessPointArn represents the Amazon Resource Name (ARN) of the access point that the file system is mounted with.
The rationale for using IAM policies with the elasticfilesystem:AccessPointArn condition key is to ensure precise and secure access control to EFS access points. By specifying the access point's ARN, you can restrict interactions to authorized users and resources only, thereby enhancing data security and preventing unauthorized access. This approach maintains the integrity and confidentiality of your data within the AWS environment.
Without using IAM policies with the elasticfilesystem:AccessPointArn condition key, access control to EFS access points becomes less precise, increasing the risk of unauthorized access. This lack of granular control can lead to potential security breaches, data exposure, and compliance violations. Consequently, your organization may face data integrity issues, financial losses, and damage to its reputation.
Below is a sample IAM policy copied from the AWS documentation:
{
"Version": "2012-10-17",
"Id": "MyFileSystemPolicy",
"Statement": [
{
"Sid": "App1Access",
"Effect": "Allow",
"Principal": { "AWS": "arn:aws:iam::111122223333:role/app1"
This policy demonstrates:
elasticfilesystem:AccessPointArn condition to restrict access to specific access pointsClientMount and ClientWrite permissions to specific IAM roleselasticfilesystem:AccessPointArn condition keyImplement IAM policies that use the elasticfilesystem:AccessPointArn condition key:
elasticfilesystem:AccessPointArn condition keyExample policy structure:
{
"Effect": "Allow",
"Principal": { "AWS": "arn:aws:iam::ACCOUNT:role/ROLE" },
"Action": ["elasticfilesystem:ClientMount", "elasticfilesystem:ClientWrite"],
"Condition": {
"StringEquals": {
"elasticfilesystem:AccessPointArn": "arn:aws:elasticfilesystem:REGION:ACCOUNT:access-point/ACCESS_POINT_ID"
}
}
}
By default, no IAM policies are automatically created for EFS access points. Users must explicitly create and configure IAM policies with appropriate condition keys to control access.
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|---|---|---|---|
| v8 | 3.3 Configure Data Access Control Lists Configure data access control lists based on a user's need to know. Apply data access control lists, also known as access permissions, to local and remote file systems, databases, and applications. | ● | ● | ● |
| v8 | 6.8 Define and Maintain Role-Based Access Control Define and maintain role-based access control, through determining and documenting the access rights necessary for each role within the enterprise to successfully carry out its assigned duties. Perform access control reviews of enterprise assets to validate that all privileges are authorized, on a recurring schedule at a minimum annually, or more frequently. | ● | ||
| v7 | 1.7 Deploy Port Level Access Control Utilize port level access control, following 802.1x standards, to control which devices can authenticate to the network. The authentication system shall be tied into the hardware asset inventory data to ensure only authorized devices can connect to the network. | ● | ● | |
| v7 | 14.6 Protect Information through Access Control Lists Protect all information stored on systems with file system, network share, claims, application, or database specific access control lists. These controls will enforce the principle that only authorized individuals should have access to the information based on their need to access the information as a part of their responsibilities. | ● | ● | ● |
Level 2