这是一个对我有用的策略。

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": "*",
      "Action": [
        "s3:ListBucket"
      ],
      "Resource": [
        "arn:aws:s3:::bucket-name"
      ]
    },
    {
      "Effect": "Allow",
      "Principal": "*",
      "Action": [
        "s3:GetObject"
      ],
      "Resource": [
        "arn:aws:s3:::bucket-name/*"
      ]
    }
  ]
}

我认为错误是由于“s3:ListObjects”操作，但我不得不添加操作“s3:ListBucket”来解决“AccessDenied for ListObjects for s3 bucket”的问题

我遇到了同样的错误“在调用ListObjectsV2操作时发生了错误(AccessDenied):访问被拒绝”

注意: 桶策略不是一个好的解决方案。 在IAM服务中创建新的自定义策略，附加到各自的用户将更安全。

按以下程序求解:

IAM Service > Policies > Create Policy > select JSON > .使用实例

{
"Version": "2012-10-17",
"Statement": [
    {
        "Effect": "Allow",
        "Action": [
            "s3:ListBucket",
            "s3:GetObject",
            "s3:GetObjectAcl",
            "s3:ListBucketVersions"
        ],
        "Resource": [
            "arn:aws:s3:::<bucket name>"
        ]
    },
    {
        "Effect": "Allow",
        "Action": [
            "s3:ListBucket",
            "s3:GetObject",
            "s3:GetObjectAcl",
            "s3:PutObject",
            "s3:DeleteObject",
            "s3:ListBucketMultipartUploads",
            "s3:ListMultipartUploadParts",
            "s3:AbortMultipartUpload",
            "s3:DeleteObjectVersion",
            "s3:GetObjectVersion",
            "s3:PutObjectACL",
            "s3:ListBucketVersions"
        ],
        "Resource": [
            "arn:aws:s3:::<bucketname>/*"
        ]
    }
]

}

选择Next Tag > Review Policy输入并创建策略。

选择新创建的策略 在新创建的策略窗口的编辑窗口中选择“Policy Usage”选项卡。 选择“附加”，从列表中选择用户并保存。

现在尝试在控制台用桶名列出对象，没有桶名会抛出相同的错误。

$aws s3 ls

遇到了类似的问题，对我来说，问题是我在bash_profile中设置了不同的AWS密钥。

我在这里回答了一个类似的问题:https://stackoverflow.com/a/57317494/11871462

如果bash_profile中有冲突的AWS密钥，AWS CLI会默认使用这些密钥。

我得到了相同的错误时使用策略如下，虽然我有“s3:ListBucket”s3:ListObjects操作。

{
"Version": "2012-10-17",
"Statement": [
    {
        "Action": [
            "s3:ListBucket",
            "s3:GetObject",
            "s3:GetObjectAcl"
        ],
        "Resource": [
            "arn:aws:s3:::<bucketname>/*",
            "arn:aws:s3:::*-bucket/*"
        ],
        "Effect": "Allow"
    }
  ]
 }

然后我通过添加一行来修复它 “攻击:aws: s3::: bucketname”

{
"Version": "2012-10-17",
"Statement": [
    {
        "Action": [
            "s3:ListBucket",
            "s3:GetObject",
            "s3:GetObjectAcl"
        ],
        "Resource": [
             "arn:aws:s3:::<bucketname>",
            "arn:aws:s3:::<bucketname>/*",
            "arn:aws:s3:::*-bucket/*"
        ],
        "Effect": "Allow"
    }
 ]
}

您已经授予了对S3桶内的对象执行命令的权限，但没有授予对桶本身执行任何操作的权限。

稍微修改一下你的策略会是这样的:

{
  "Version": "version_id",
  "Statement": [
    {
        "Sid": "some_id",
        "Effect": "Allow",
        "Action": [
            "s3:*"
        ],
        "Resource": [
            "arn:aws:s3:::bucketname",
            "arn:aws:s3:::bucketname/*"
        ]
    }
  ] 
}

然而，这可能会给予超出所需的许可。遵循AWS IAM授予最小特权的最佳实践将看起来像这样:

{
  "Version": "2012-10-17",
  "Statement": [
      {
          "Effect": "Allow",
          "Action": [
              "s3:ListBucket"
          ],
          "Resource": [
              "arn:aws:s3:::bucketname"
          ]
      },
      {
          "Effect": "Allow",
          "Action": [
              "s3:GetObject"
          ],
          "Resource": [
              "arn:aws:s3:::bucketname/*"
          ]
      }
  ]
}