Google 存储审核日志 - 查找谁在尝试访问

Question

我有一个启用了审核日志的 google 存储桶。每 one\two 天我都会收到有关 PERMISSION DENIED 的日志。日志指定请求者要求的访问类型。但是，没有给我足够的信息来回答这个问题 - 谁在请求？

这是日志消息：

{
    "insertId": "rr6wsd...",
    "logName": "projects/PROJECT_ID/logs/cloudaudit.googleapis.com%2Fdata_access",
    "protoPayload": {
        "@type": "type.googleapis.com/google.cloud.audit.AuditLog",
        "authenticationInfo": {},
        "authorizationInfo": [
            {
                "permission": "storage.buckets.get",
                "resource": "projects//buckets/BUCKET_NAME",
                "resourceAttributes": {}
            }
        ],
        "methodName": "storage.buckets.get",
        "requestMetadata": {
            "callerSuppliedUserAgent": "Blob/1 (cr/340918833)",
            "destinationAttributes": {},
            "requestAttributes": {
                "auth": {},
                "reason": "8uSywAZKWkhOZWVkZWQg...",
                "time": "2021-01-20T03:43:38.405230045Z"
            }
        },
        "resourceLocation": {
            "currentLocations": [
                "us-central1"
            ]
        },
        "resourceName": "projects//buckets/BUCKET_NAME",
        "serviceName": "storage.googleapis.com",
        "status": {
            "code": 7,
            "message": "PERMISSION_DENIED"
        }
    },
    "receiveTimestamp": "2021-01-20T03:43:38.488787956Z",
    "resource": {
        "labels": {
            "bucket_name": "BUCKET_NAME",
            "location": "us-central1",
            "project_id": "PROJECT_ID"
        },
        "type": "gcs_bucket"
    },
    "severity": "ERROR",
    "timestamp": "2021-01-20T03:43:38.399417759Z"
}

如您所见，唯一谈论“谁正在尝试访问”的信息是

"callerSuppliedUserAgent": "Blob/1 (cr/340918833)",

但这意味着什么？对我来说毫无意义。

我如何了解谁在尝试访问此权限？

Answer 1

callerSuppliedUserAgent 可以是客户端应用程序在其请求 header 中放入的任何内容 - 忽略它，因为此 header 可能是伪造的。只有合法的应用程序才会在 header.

中放置任何有意义的内容

这是一个未经身份验证的请求。没有身份可以记录。很可能是巨魔扫描互联网寻找打开的桶。

注意 auth 键是空的。请求中未提供授权。

"requestAttributes": {
    "auth": {},
    "reason": "8uSywAZKWkhOZWVkZWQg...",
    "time": "2021-01-20T03:43:38.405230045Z"
}

Google 存储审核日志 - 查找谁在尝试访问

Google Storage AuditLogs - finding who is trying to access

google-cloud-storage

google-cloud-logging

google-iam