OSS bucket allows put action from all principals

This product is not supported for your selected Datadog site. ().

Metadata

Id: fe286195-e75c-4359-bd58-00847c4f855a

Cloud Provider: Alicloud

Platform: Terraform

Severity: Critical

Category: Access Control

Learn More

Description

OSS bucket (alicloud_oss_bucket) policies must not allow the Put action from all principals. This prevents accidental exposure of private data and unauthorized uploads, overwrites, or deletions. The rule flags policies where Effect is Allow, Action includes Put, and Principal is set to * (i.e., applies to all identities). To secure access, restrict Principal to specific identities or scope access with conditions.

Compliant Code Examples

resource "alicloud_oss_bucket" "bucket-policy3" {
  bucket = "bucket-3-policy"
  acl    = "private"

  policy = <<POLICY
  {"Statement": [
    {
        "Action": [
            "oss:PutObjectAcl", "oss:PutObject"
        ],
        "Effect": "Deny",
        "Principal": [
            "*"
        ],
        "Resource": [
            "acs:oss:*:174649585760xxxx:examplebucket"
        ]
    }
  ],
   "Version":"1"}
  POLICY
}

resource "alicloud_oss_bucket" "bucket-policy2" {
  bucket = "bucket-2-policy"
  acl    = "private"

  policy = <<POLICY
  {"Statement": [
    {
        "Action": [
            "oss:PutObjectAcl", "oss:PutObject"
        ],
        "Effect": "Allow",
        "Principal": [
            "20214760404935xxxx"
        ],
        "Resource": [
            "acs:oss:*:174649585760xxxx:examplebucket"
        ]
    }
  ],
   "Version":"1"}
  POLICY
}

resource "alicloud_oss_bucket" "bucket-policy1" {
  bucket = "bucket-1-policy"
  acl    = "private"

  policy = <<POLICY
  {"Statement": [
    {
        "Action": [
            "oss:AbortMultipartUpload"
        ],
        "Effect": "Allow",
        "Principal": [
            "*"
        ],
        "Resource": [
            "acs:oss:*:174649585760xxxx:examplebucket"
        ]
    }
  ],
   "Version":"1"}
  POLICY
}

Non-Compliant Code Examples

resource "alicloud_oss_bucket" "bucket-policy5" {
  bucket = "bucket-5-policy"
  acl    = "private"

  policy = <<POLICY
  {"Statement": [
    {
        "Action": [
            "oss:PutObject", "oss:RestoreObject"
        ],
        "Effect": "Allow",
        "Principal": [
            "*"
        ],
        "Resource": [
            "acs:oss:*:174649585760xxxx:examplebucket"
        ]
    }
  ],
   "Version":"1"}
  POLICY
}

resource "alicloud_oss_bucket" "bucket-policy4" {
  bucket = "bucket-4-policy"
  acl    = "private"

  policy = <<POLICY
  {"Statement": [
    {
        "Action": [
            "oss:PutObjectAcl", "oss:PutObject"
        ],
        "Effect": "Allow",
        "Principal": [
            "*"
        ],
        "Resource": [
            "acs:oss:*:174649585760xxxx:examplebucket"
        ]
    }
  ],
   "Version":"1"}
  POLICY
}