In AWS S3, I have one bucket named "Environments" under that I have 4 folders named "sandbox", "staging", "prod1" and "prod2" respectively and the permission of the whole bucket is "public".
Now I want to restrict One AWS user named "developer" to write anything into "prod1" and "prod2" folder but it can view them.
Kindly help me out with this
Create below policy and attach to a user developer
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"s3:GetBucketLocation",
"s3:ListAllMyBuckets"
],
"Resource": "arn:aws:s3:::*"
},
{
"Effect": "Allow",
"Action": "s3:*",
"Resource": [
"arn:aws:s3:::Environments",
"arn:aws:s3:::Environments/sandbox/*",
"arn:aws:s3:::Environments/staging/*",
]
}
]
}
This policy allows to full permission to folder sandbox and staging, but restrict another folder to user developer
Related
Which permission needed to perform move action on objects within the same S3 bucket?
To clarify, we have a bucket named BCK and two folders inside named DIR1 & DIR2. An IAM user needs to move objects within DIR1 to DIR2 and when they perform the action from the management console management they get the an error "access denied".
The only policy attached to the user is:
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "VisualEditor0",
"Effect": "Allow",
"Action": [
"s3:GetObject",
"s3:PutObject",
"s3:DeleteObject",
"s3:ListBucket",
"s3:ListBucketVersions"
],
"Resource": [
"arn:aws:s3:::BCK/*",
"arn:aws:s3:::BCK"
]
},
{
"Sid": "VisualEditor2",
"Effect": "Allow",
"Action": [
"s3:ListAllMyBuckets",
"s3:HeadBucket"
],
"Resource": "*"
}
]
}
There is no "move" command in Amazon S3. Instead, it requires a combination of CopyObject and DeleteObject. You have already provided these permissions.
The Amazon S3 management console also performs additional steps during the copy operation, such as viewing/setting permissions on each object. Therefore, add these permissions:
s3:GetObjectAcl
s3:PutObjectAcl
I am working on the project where I need to share S3 bucket with 2 other teams using 2 different AWS accounts (User B and User C). These two teams need rights to upload and download the datasets to s3 bucket, and later on I should be able to download the content which they upload.
I use following bucket policy
{
"Version": "2008-10-17",
"Statement": [
{
"Sid": "AllowRead",
"Effect": "Allow",
"Principal": {
"AWS": [
"arn:aws:iam::111111111111:root",
"arn:aws:iam::222222222222:root"
]
},
"Action": [
"s3:ListBucket",
"s3:ListBucketMultipartUploads"
],
"Resource": "arn:aws:s3::: bucketname-test "
},
{
"Sid": "AllowRead",
"Effect": "Allow",
"Principal": {
"AWS": [
"arn:aws:iam::111111111111:root",
"arn:aws:iam::222222222222:root"
]
},
"Action": [
"s3:GetObject",
"s3:ListMultipartUploadParts"
],
"Resource": "arn:aws:s3:::bucketname-test/*"
}
]
}
Thanks to this User B and User C are able to upload and download the content to the shared s3 bucket.
However, me as User A and at the same time admin of the account where the S3 bucket is created I am not able to download content which is uploaded by User B and User C.
How can I solve the issue?
I am trying to do a simple task where in I must be able to download a file in S3 which has a specific tag via SFTP. I am trying to achieve this by inserting a condition to the SFTP IAM Policy.
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "AllowListingOfUserFolder",
"Action": [
"s3:ListBucket",
"s3:GetBucketLocation"
],
"Effect": "Allow",
"Resource": [
"arn:aws:s3:::bucket_name"
]
},
{
"Sid": "HomeDirObjectAccess",
"Effect": "Allow",
"Action": [
"s3:GetObject"
],
"Resource": "arn:aws:s3:::bucket_name/*",
"Condition": {
"StringEquals": {
"s3:ExistingObjectTag/key": "value"
}
}
}
]
}
But when I use this policy with the SFTP role, WinSCP throws permission denied error when I try to login to the server. I am able to login only if I remove the Condition part in the policy. If anyone knows how to do this, please guide me. Thanks in advance.
It is not possible to restrict GetObject based on object tags.
IAM checks whether the user is entitled to make the request before it looks at the objects in Amazon S3 themselves. The tags are not available during this process.
Putting the objects in folders and restricting access by folder should meet your requirements.
I have created a bucket name "A" with following permissions:
1. Grantee: B List Update/delete
2. Grantee: Everyone List view/download
From IOS(front-end), they are uploading a video to this Bucket.After uploaded only the 1st permission is applied, second is not, So we nobody can download that video from S3.
Please share your ideas. Thanks in advance.
I can't see any view/download option in the S3 Permissions pane.
As a general rule, AWS recommends using S3 bucket policies or IAM
policies for access control. S3 ACLs is a legacy access control
mechanism that predates IAM.
AWS Security Blog
If you wish to use a bucket policy instead, you can do the following:
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "Stmt1420667647000",
"Effect": "Allow",
"Principal": {
"AWS": "*"
},
"Action": [
"s3:GetObject"
],
"Resource": [
"arn:aws:s3:::YOUR-BUCKET-NAME/*"
]
},
{
"Sid": "Stmt1420667680000",
"Effect": "Allow",
"Principal": {
"AWS": "arn:aws:iam::account-number-without-hyphens:user/username"
},
"Action": [
"s3:DeleteObject",
"s3:PutObject"
],
"Resource": [
"arn:aws:s3:::YOUR-BUCKET-NAME/*"
]
}
]
}
I created a bucket which host some web small web page and a few docs which should only be read accessible by users which have a certain login in IAM. These users should only have (read) access to this specific bucket and no other bucket. Ideally these users shouldn't even know that there are other buckets out there.
For this I create a "test" user in IAM, added the user to a group and assigned a group policy as below:
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "AllowGroupToSeeBucketListAndAlsoAllowGetBucketLocationRequiredForListBucket",
"Action": [
"s3:ListAllMyBuckets",
"s3:GetBucketLocation"
],
"Effect": "Allow",
"Resource": [
"arn:aws:s3:::*"
]
},
{
"Sid": "AllowS3GetActionsInPrivateFolder",
"Effect": "Allow",
"Action": [
"s3:*"
],
"Resource": [
"arn:aws:s3:::my.web.page/*"
]
}
]
}
When I login with the test user and navigate to S3 I can see all my other buckets and when I click on another bucket I get a "Sorry, no permission" error. This kinda works but ideally the user shouldn't even be able to even list any other buckets.
When I go to https://s3.amazonaws.com/my.web.page/index.html I get a AccessDenied XML message. How can should I modify the policy to be able to open a html page in this bucket with a browser.
The user still has write access to the bucket. How can I only grant read access?
Your help is much appreciated.
Use this policy it will work. Where it says example bucket put you bucket name
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "AllowGroupToSeeBucketListAndAlsoAllowGetBucketLocationRequiredForListBucket",
"Action": [
"s3:GetObject"
],
"Effect": "Allow",
"Resource": [
"arn:aws:s3:::examplebucket/*"
]
},
{
"Sid": "AllowS3GetActionsInPrivateFolder",
"Effect": "Allow",
"Action": [
"s3:*"
],
"Resource": [
"arn:aws:s3:::my.web.page/*"
]
}
]
}