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alibabacloud

Log monitoring and alerts are set up for VPC changes

sls_vpc_changes_alert_enabled
Service: slsSeverity: medium
OfficialBuilt-inVerified
Categories:logging
Resource Type:ALIYUN::SLS::Alert

Alibaba Cloud SLS should have an alarm configured for VPC changes. By directing ActionTrail logs to SLS with alert rules, VPC modifications are monitored in real time. This ensures creation, deletion, or modification of VPCs and associated components is promptly detected.

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Risk

Without monitoring for VPC changes, unauthorized modifications to network infrastructure may go undetected, disrupting connectivity, creating vulnerabilities, or exposing internal resources. This increases risk of service disruption, data interception, and lateral movement, compromising confidentiality and availability of connected resources.

Run this check with Prowler

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Run
prowler alibabacloud --checks sls_vpc_changes_alert_enabled

Recommendation

  1. Log on to the SLS Console
  2. Ensure ActionTrail is enabled
  3. Select Alerts
  4. Ensure alert rule has been enabled for VPC changes

Remediation

CLI

aliyun sls create-alert --project <project-name> --alert-name vpc-changes --alert-displayname 'VPC Changes Alert' --condition 'event.serviceName: Vpc and (event.eventName: CreateVpc or event.eventName: DeleteVpc or event.eventName: ModifyVpcAttribute)' --dashboard <dashboard-name> --schedule '{"type":"FixedRate","interval":"1m"}'

Other

1Log on to the **SLS Console**.
2Ensure **ActionTrail** is enabled and delivering logs to a **Log Service** project.
3Navigate to the project receiving ActionTrail logs.
4Select **Alerts** and click **Create Alert Rule**.
5Configure the query to filter for VPC changes: `event.serviceName: Vpc and (event.eventName: CreateVpc or event.eventName: DeleteVpc or event.eventName: ModifyVpcAttribute)`.
6Set the alert **schedule**, **notification method**, and **severity**.
7Save and enable the alert rule.

Check Code

from prowler.lib.check.models import Check, CheckReportAlibabaCloud
from prowler.providers.alibabacloud.services.sls.sls_client import sls_client


class sls_vpc_changes_alert_enabled(Check):
    def execute(self) -> list[CheckReportAlibabaCloud]:
        findings = []
        found = False

        for alert in sls_client.alerts:
            query_list = alert.configuration.get("queryList", [])
            if not query_list:
                continue

            for query_obj in query_list:
                query = query_obj.get("query", "")
                if ("Ecs" in query or "Vpc" in query) and (
                    "CreateVpc" in query
                    or "DeleteVpc" in query
                    or "DisableVpcClassicLink" in query
                    or "EnableVpcClassicLink" in query
                    or "DeletionProtection" in query
                    or "AssociateVpcCidrBlock" in query
                    or "UnassociateVpcCidrBlock" in query
                    or "RevokeInstanceFromCen" in query
                    or "CreateVSwitch" in query
                    or "DeleteVSwitch" in query
                ):
                    found = True
                    report = CheckReportAlibabaCloud(
                        metadata=self.metadata(), resource=alert
                    )
                    report.status = "PASS"
                    report.status_extended = (
                        f"SLS Alert {alert.name} is configured for VPC changes."
                    )
                    report.resource_id = alert.name
                    report.resource_arn = alert.arn
                    report.region = alert.region
                    findings.append(report)
                    break

            if found:
                break

        if not found:
            report = CheckReportAlibabaCloud(
                metadata=self.metadata(), resource=sls_client.provider.identity
            )
            report.status = "FAIL"
            report.status_extended = "No SLS Alert configured for VPC changes."
            report.resource_id = sls_client.audited_account
            report.resource_arn = sls_client.provider.identity.identity_arn
            report.region = sls_client.region
            findings.append(report)

        return findings

References