My CodeBuild is configured with CodePipeline. S3 is my artifact store. I continue to get an Access denied message despite having attached IAM roles with sufficient access.
Screenshot of the error message
I have already checked the service role associated with Codebuild. It has the following policy attached to it.
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Resource": [
"arn:aws:logs:ap-southeast-1:682905754632:log-group:/aws/codebuild/Build",
"arn:aws:logs:ap-southeast-1:682905754632:log-group:/aws/codebuild/Build:*"
],
"Action": [
"logs:CreateLogGroup",
"logs:CreateLogStream",
"logs:PutLogEvents"
]
},
{
"Effect": "Allow",
"Resource": [
"arn:aws:s3:::codepipeline-ap-southeast-1-*"
],
"Action": [
"s3:PutObject",
"s3:GetObject",
"s3:GetObjectVersion"
]
}
]
}
But when I test it using the IAM policy validator I get the following error message.
Based on the accepted answer to this question the policy that I currently have should allow me to get the artifacts from S3 without any problems - AWS Codebuild fails while downloading source. Message: Access Denied
How do I get rid of the access denied message?
This generally happens when you have a CodeBuild project already and you integrate it to a CodePipeline pipeline. When you integrate a Codebuild project with CodePipeline, the project will retrieve it's source from the CodePipeline Source output. Source output will be stored in the artifact store location, which is an S3 bucket, either a default bucket created by CodePipeline or one you specify upon pipeline creation.
So, you will need to provide permissions to the CodeBuild Service role to access the CodePipline bucket in S3. The role will require permissions to put S3 objects in the bucket, as well as get objects.
Policy which i tried and same is working:
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "CodeBuildDefaultPolicy",
"Effect": "Allow",
"Action": [
"codebuild:*",
"iam:PassRole"
],
"Resource": "*"
},
{
"Sid": "CloudWatchLogsAccessPolicy",
"Effect": "Allow",
"Action": [
"logs:FilterLogEvents",
"logs:GetLogEvents"
],
"Resource": "*"
},
{
"Sid": "S3AccessPolicy",
"Effect": "Allow",
"Action": [
"s3:CreateBucket",
"s3:GetObject",
"s3:List*",
"s3:PutObject"
],
"Resource": "*"
}
]
}
Policy Simulator
AWS Reference
Related
I've specified the IAM access policy for one specific S3 bucket that's working fine with ListAllMyBuckets action. However I don't want to list all buckets to the user. If I remove LisAllBuckets action then I get the error,
Access Denied (Service: Amazon S3; Status Code: 403; Error Code: AccessDenied; Request ID: 37A0TA0JGKQA56FJ; S3 Extended Request ID: yWLJEG4RSqGKXjphkcvfOUTCqPe6Qtq/aZUKek1LJ
error when trying to access using access key id & Secret access key thru my application. It looks this policy should work as per AWS guidelines https://aws.amazon.com/blogs/security/writing-iam-policies-how-to-grant-access-to-an-amazon-s3-bucket/ - but its not working as expected. Can you pls help me to resolve this issue? Thanks.
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"s3:ListAllMyBuckets"
],
"Resource": "*"
},
{
"Effect": "Allow",
"Action": [
"s3:ListBucket"
],
"Resource": [
"arn:aws:s3:::ohdart-dev-assessments"
]
},
{
"Effect": "Allow",
"Action": [
"s3:PutObject",
"s3:GetObject"
],
"Resource": [
"arn:aws:s3:::ohdart-dev-assessments/*"
]
}
]
}
TL;DR: This isn't supported by AWS.
I'm trying to set up the same scenario, both for least-priveleged access as well as for providing the simplest ease of use.
According to the AWS knowedlege centre (as of 2022-07-22) if you do not want to allow the s3:ListAllMyBuckets action the recommended alternative is to allow the s3:ListBucket action (possibly providing a Condition so as to limit the paths accessible):
{
"Effect": "Allow",
"Action": [
"s3:ListBucket"
],
"Resource": [
"arn:aws:s3:::DOC-EXAMPLE-BUCKET"
],
"Condition": {
"StringLike": {
"s3:prefix": [
"folder1/folder2/*"
]
}
}
}
and then to:
Provide the user with a direct console link to the S3 bucket or folder. The direct console link to an S3 bucket looks like this:
https://s3.console.aws.amazon.com/s3/buckets/DOC-EXAMPLE-BUCKET/folder1/folder2/
I want to create an IAM user whose sole job is to deploy to AWS S3 Static Website.
I have this policy given to my DeployUser:
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "VisualEditor0",
"Effect": "Allow",
"Action": [
"s3:ListBucket"
],
"Resource": "arn:aws:s3:::www.<my-site-name>.com"
},
{
"Effect": "Allow",
"Action": [
"s3:GetObject",
"s3:PutObject",
"s3:PutBucketAcl",
"s3:DeleteObject"
],
"Resource": "arn:aws:s3:::www.<my-site-name>.com/*"
}
]
}
And this is my bucket policy:
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "PublicReadGetObject",
"Effect": "Allow",
"Principal": "*",
"Action": "s3:GetObject",
"Resource": "arn:aws:s3:::www.<my-site-name>.com/*"
}
]
}
And this is the issue I get when I deploy (I am using Github Actions for this):
upload failed: public/404.html to s3://www.<my-site-name>.com/404.html An error occurred (AccessDenied) when calling the PutObject operation: Access Denied
In Github, I passed the access key and secret of the user to my Action. I am pretty sure it is using that user to do the transaction. When I give S3FullAccess, my user is able to do it just fine. But I want to create a user with the AWS actions it only needs.
Where can I see better logs of this IAM user's actions?
Based on the comments, the solution was to add PutObject in the backed policy for the DeployUser.
I'm configuring a replication between two s3 buckets. but I get the error
Access denied: Amazon S3 can't detect whether versioning is enabled on
the destination bucket.
The destination bucket is in another account, different region.
Here is the bucket policy in the destination bucket:
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Deny",
"Principal": "*",
"Action": "s3:*",
"Resource": [
"arn:aws:s3:::destination",
"arn:aws:s3:::destination/*"
],
"Condition": {
"StringNotLike": {
"aws:userId": [
"AROAS3AHCETXXDF5Z5GVG:*",
"AROAS3AHCETXX2DMH4JPY:*",
"AROAS3AHCEXXX4SNCNTNV:*",
"AROAVJZZXXXXXZBBR7PN6L:*"
]
}
}
},
{
"Sid": "S3ReplicationPolicyStmt1",
"Effect": "Allow",
"Principal": {
"AWS": "arn:aws:iam::XXXXXXXXXXX:root"
},
"Action": [
"s3:GetBucketVersioning",
"s3:GetObjectVersionForReplication",
"s3:PutBucketVersioning",
"s3:ReplicateObject",
"s3:ReplicateDelete",
"s3:PutObjectAcl",
"s3:ObjectOwnerOverrideToBucketOwner"
],
"Resource": [
"arn:aws:s3:::destination",
"arn:aws:s3:::destination/*"
]
}
]
}
My buckets are highly confidential, so I first deny all access except for some roles: So in the condition, I have the replication role ID excluded too.
Why the replication role is still not allowed to replicate? What is wrong with this bucket policy ?
In the above policy I actually authorize the replication role twice. in both statements.
Here is the replication IAM role policy:
{
"Version": "2012-10-17",
"Statement": [
{
"Action": [
"s3:Get*",
"s3:ListBucket"
],
"Effect": "Allow",
"Resource": [
"arn:aws:s3:::source",
"arn:aws:s3:::source/*"
]
},
{
"Action": [
"s3:ReplicateObject",
"s3:ReplicateDelete",
"s3:ReplicateTags",
"s3:GetBucketVersioning",
"s3:GetObjectVersionTagging",
"s3:ObjectOwnerOverrideToBucketOwner"
],
"Effect": "Allow",
"Resource": "arn:aws:s3:::destination/*"
}
]
}
I tried deleting the explicite deny statement and test the replication, the source bucket gets the Versioning and I had no access denied, but objects are not replicated.
For my experience, AWS S3 policies follow a white-list approach, meaning that you first need to add statements for the actions you want to allow, and then a final statement to deny everything else.
So in your case, try to just switch the statements.
The solution was to white list the replication role in the source bucket as well. Both buckets have similar policy so It was necessary to allow the replication role to access the source.
we are using Amazon S3 services and bucket for storing our data, now I have a problem, everything is working, but I want to restrict Delete object permissions only on few tables inside bucket, somehow this is not working:
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "Stmt1448899531000",
"Effect": "Allow",
"Action": [
"s3:Get*",
"s3:Put*",
"s3:List*"
],
"Resource": [
"*"
]
},
{
"Sid": "Stmt1461061827000",
"Effect": "Allow",
"Action": [
"s3:DeleteObject"
],
"Resource": [
"arn:aws:s3:::cf-templates-11e3g59cf34bh-eu-west-1/report_file_html/*",
"arn:aws:s3:::cf-templates-11e3g59cf34bh-eu-west-1/market_intelligence_result_sets/*"
]
}
]
}
I checked the ARN for bucket and it is "arn:aws:s3:::cf-templates-11e3g59cf34bh-eu-west-1" as excpected, market_intelligence and report_file_html tables also exist in the bucket, so I want to limit delete object action only to these tables,but from my PHP app, I get 403 error, permission denied to delete an object.
Using Amazon IAM Policy Validator, these rules validates successfully, but then using aws CLI, I get access denied error when calling DeleteObject.
I am trying to give a programmatic IAM user access to a single bucket.
I setup the following policy and attached it to the user:
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"s3:ListBucket"
],
"Resource": [
"arn:aws:s3:::mybucket"
]
},
{
"Effect": "Allow",
"Action": [
"s3:PutObject",
"s3:GetObject",
"s3:DeleteObject"
],
"Resource": [
"arn:aws:s3:::mybucket/*"
]
}
]
}
Trying to programatically upload a file I got a 403.
I got this policy from here:
Writing IAM Policies: How to Grant Access to an Amazon S3 Bucket
I verified that everything else is working by then adding an AWS managed policy, AmazonS3FullAccess, after which my upload succeeded. But I would rather not give this user full access.
There are no other policies attached to this user.
Nothing is wrong with your policy. Make sure you're using the right bucket name in the IAM policy and to add the policy to the user.
You can test it with IAM Policy Simulator. Maybe you should consider the time to policies take effect, but it's "almost immediately". See this answer.
You can try this policy to give full access to a particular bucket:
{
"Version": "2012-10-17",
"Statement": [{
"Action": "s3:*",
"Effect": "Allow",
"Resource": [
"arn:aws:s3:::<BUCKETNAME>/*"
]
},
{
"Effect": "Allow",
"Action": "s3:ListAllMyBuckets",
"Resource": "arn:aws:s3:::*"
}
]
}
Since you are providing Put, Get, Delete, You might as well provide full access to the particular bucket.