s3tk是一款什么安全審計(jì)套件

這篇文章主要介紹s3tk是一款什么安全審計(jì)套件，文中介紹的非常詳細(xì)，具有一定的參考價(jià)值，感興趣的小伙伴們一定要看完！

s3tk是一款針對(duì)Amazon S3的安全審計(jì)套件，廣大安全研究人員可以使用s3tk來(lái)對(duì)Amazon S3 Bucket進(jìn)行安全測(cè)試。

工具安裝

廣大研究人員可以使用pip來(lái)完成s3tk的安裝：

pip install s3tk

研究人員可以使用AWS CLI命令行工具來(lái)配置AWS憑證：

pip install awscliaws configure

工具使用命令

安全掃描

可掃描的Bucket組件如下：

1、公開ACL

2、公開策略

3、屏蔽的公開訪問(wèn)

4、啟用的登錄

5、版本修改

6、默認(rèn)加密

s3tk scan

針對(duì)特定Bucket運(yùn)行掃描：

s3tk scan my-bucket my-bucket-2

支持通配符：

s3tk scan "my-bucket*"

跳過(guò)日志和默認(rèn)加密：

s3tk scan --skip-logging --skip-versioning --skip-default-encryption

獲取郵件通知（通過(guò)SNS）：

s3tk scan --sns-topic arn:aws:sns:...

枚舉策略

枚舉Bucket策略：

s3tk list-policy

針對(duì)特定Bucket運(yùn)行掃描：

s3tk list-policy my-bucket my-bucket-2

顯示名稱：

s3tk list-policy --named

設(shè)置策略：

s3tk set-policy my-bucket --no-object-acl

刪除策略：

s3tk delete-policy my-bucket

屏蔽公開訪問(wèn)：

s3tk block-public-access my-bucket my-bucket-2

啟用默認(rèn)加密

針對(duì)所有Bucket啟用默認(rèn)加密：

s3tk enable-default-encryption

僅針對(duì)特定Bucket啟用：

s3tk enable-default-encryption my-bucket my-bucket-2

掃描對(duì)象ACL

掃描目標(biāo)Bucket中所有對(duì)象的ACL：

s3tk scan-object-acl my-bucket

掃描特定對(duì)象：

s3tk scan-object-acl my-bucket --only "*.pdf"

排除特定對(duì)象：

s3tk scan-object-acl my-bucket --except "*.jpg"

掃描DNS

s3tk scan-dns

憑證

用戶憑證可以在“~/.aws/credentials”中或環(huán)境變量中設(shè)置，我們可以使用下列命令設(shè)置一個(gè)profile：

AWS_PROFILE=your-profile s3tk

IAM策略

下面給出的是每一條命令所需的權(quán)限，用戶只需要將相應(yīng)權(quán)限在下列代碼中聲明即可：

{"Version": "2012-10-17","Statement": [
        {"Sid": "Scan","Effect": "Allow","Action": ["s3:ListAllMyBuckets","s3:GetBucketAcl","s3:GetBucketPolicy","s3:GetBucketPublicAccessBlock","s3:GetBucketLogging","s3:GetBucketVersioning","s3:GetEncryptionConfiguration"],"Resource": "*"},
        {"Sid": "ScanDNS","Effect": "Allow","Action": ["s3:ListAllMyBuckets","route53:ListHostedZones","route53:ListResourceRecordSets"],"Resource": "*"},
        {"Sid": "ListPolicy","Effect": "Allow","Action": ["s3:ListAllMyBuckets","s3:GetBucketPolicy"],"Resource": "*"},
        {"Sid": "SetPolicy","Effect": "Allow","Action": ["s3:PutBucketPolicy"],"Resource": "*"},
        {"Sid": "DeletePolicy","Effect": "Allow","Action": ["s3:DeleteBucketPolicy"],"Resource": "*"},
        {"Sid": "BlockPublicAccess","Effect": "Allow","Action": ["s3:ListAllMyBuckets","s3:PutBucketPublicAccessBlock"],"Resource": "*"},
        {"Sid": "EnableLogging","Effect": "Allow","Action": ["s3:ListAllMyBuckets","s3:PutBucketLogging"],"Resource": "*"},
        {"Sid": "EnableVersioning","Effect": "Allow","Action": ["s3:ListAllMyBuckets","s3:PutBucketVersioning"],"Resource": "*"},
        {"Sid": "EnableDefaultEncryption","Effect": "Allow","Action": ["s3:ListAllMyBuckets","s3:PutEncryptionConfiguration"],"Resource": "*"},
        {"Sid": "ResetObjectAcl","Effect": "Allow","Action": ["s3:ListBucket","s3:GetObjectAcl","s3:PutObjectAcl"],"Resource": ["arn:aws:s3:::my-bucket","arn:aws:s3:::my-bucket/*"]
        },
        {"Sid": "Encrypt","Effect": "Allow","Action": ["s3:ListBucket","s3:GetObject","s3:PutObject"],"Resource": ["arn:aws:s3:::my-bucket","arn:aws:s3:::my-bucket/*"]
        },
        {"Sid": "DeleteUnencryptedVersions","Effect": "Allow","Action": ["s3:ListBucketVersions","s3:GetObjectVersion","s3:DeleteObjectVersion"],"Resource": ["arn:aws:s3:::my-bucket","arn:aws:s3:::my-bucket/*"]
        }
    ]
}

訪問(wèn)日志

Amazon Athena適用于查詢S3日志，創(chuàng)建下列表：

CREATE EXTERNAL TABLE my_bucket (
    bucket_owner string,
    bucket string,time string,
    remote_ip string,
    requester string,
    request_id string,
    operation string,
    key string,
    request_verb string,
    request_url string,
    request_proto string,
    status_code string,
    error_code string,
    bytes_sent string,
    object_size string,
    total_time string,
    turn_around_time string,
    referrer string,
    user_agent string,
    version_id string
)
ROW FORMAT SERDE 'org.apache.hadoop.hive.serde2.RegexSerDe'WITH SERDEPROPERTIES ('serialization.format' = '1','input.regex' = '([^ ]*) ([^ ]*) \\[(.*?)\\] ([^ ]*) ([^ ]*) ([^ ]*) ([^ ]*) ([^ ]*) \\\"([^ ]*) ([^ ]*) (- |[^ ]*)\\\" (-|[0-9]*) ([^ ]*) ([^ ]*) ([^ ]*) ([^ ]*) ([^ ]*) ([^ ]*) (\"[^\"]*\\") ([^ ]*)$') LOCATION 's3://my-s3-logs/my-bucket/';

修改最后一行代碼，并指向你的日志Bucket：

SELECTdate_parse(time, '%d/%b/%Y:%H:%i:%S +0000') AS time,
    request_url,
    remote_ip,
    user_agentFROMmy_bucketWHERErequester = '-'AND status_code LIKE '2%'AND request_url LIKE '/some-keys%'ORDER BY 1

CloudTrail日志

Amazon Athena同樣可以用于查詢CloudTrail日志，創(chuàng)建一個(gè)表：

CREATE EXTERNAL TABLE cloudtrail_logs (
    eventversion STRING,
    userIdentity STRUCT<type:STRING,
        principalid:STRING,
        arn:STRING,
        accountid:STRING,
        invokedby:STRING,
        accesskeyid:STRING,
        userName:String,
        sessioncontext:STRUCT<attributes:STRUCT<mfaauthenticated:STRING,
                creationdate:STRING>,
            sessionIssuer:STRUCT<type:STRING,
                principalId:STRING,
                arn:STRING,
                accountId:STRING,
                userName:STRING>>>,
    eventTime STRING,
    eventSource STRING,
    eventName STRING,
    awsRegion STRING,
    sourceIpAddress STRING,
    userAgent STRING,
    errorCode STRING,
    errorMessage STRING,
    requestId  STRING,
    eventId  STRING,
    resources ARRAY<STRUCT<ARN:STRING,
        accountId:STRING,
        type:STRING>>,
    eventType STRING,
    apiVersion  STRING,
    readOnly BOOLEAN,
    recipientAccountId STRING,
    sharedEventID STRING,
    vpcEndpointId STRING,
    requestParameters STRING,
    responseElements STRING,
    additionalEventData STRING,
    serviceEventDetails STRING
)
ROW FORMAT SERDE 'com.amazon.emr.hive.serde.CloudTrailSerde'STORED  AS INPUTFORMAT 'com.amazon.emr.cloudtrail.CloudTrailInputFormat'OUTPUTFORMAT 'org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat'LOCATION  's3://my-cloudtrail-logs/'

修改最后一行代碼，并指向你的CloudTrail日志Bucket：

SELECTeventTime,
    eventName,userIdentity.userName,
    requestParametersFROMcloudtrail_logsWHEREeventName LIKE '%Bucket%'ORDER BY 1

Bucket策略

{"Version": "2012-10-17","Statement": [
        {"Effect": "Deny","Principal": "*","Action": "s3:PutObjectAcl","Resource": "arn:aws:s3:::my-bucket/*"}
    ]
}

工具更新

運(yùn)行下列命令：

pip install s3tk --upgrade

使用Master，可運(yùn)行下列命令：

pip install git+https://github.com/ankane/s3tk.git --upgrade

Docker運(yùn)行

運(yùn)行下列命令：

docker run -it ankane/s3tk aws configure

提交你的憑證：

docker commit $(docker ps -l -q) my-s3tk

接下來(lái)，運(yùn)行下列命令：

docker run -it my-s3tk s3tk scan

工具運(yùn)行截圖

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