The asset exposure analysis feature automatically analyzes the exposures of your Elastic Compute Service (ECS) instances on the Internet and visualizes the communication links between ECS instances and the Internet. It also displays details about the vulnerabilities in the exposed ECS instances in a centralized manner. The feature helps you identify abnormal exposures of your assets on the Internet and provides suggestions on vulnerability fixes. This topic describes how to use the asset exposure analysis feature of Security Center.
The asset exposure analysis feature depends on the middleware information collected in asset fingerprints. To collect the middleware information, perform the following operations: In the upper-right corner of the Asset Fingerprints page, click Settings. In the Settings dialog box, set Middleware to Collected once an hour, Collected once 3 hours, Collected once 12 hours, or Collected once a day. If you set Middleware to Disable or a value that indicates a long collection cycle such as Collected once every 7 days, the asset exposure analysis feature does not refresh the analysis results on a daily basis. For more information, see Automatic collection.
The analysis results of asset exposures are automatically refreshed on a daily basis. You do not need to manually refresh the results.
Only the Enterprise and Ultimate editions of Security Center support this feature. If you do not use these editions, you must upgrade Security Center to the Enterprise or Ultimate edition before you can use this feature. For more information about how to purchase and upgrade Security Center, see Purchase Security Center and Upgrade and downgrade Security Center. For more information about the features that each edition supports, see Features.
The analysis results of asset exposures only involve the exposures of your ECS instances on the Internet. The results do not contain the exposures of servers that are not deployed on Alibaba Cloud on the Internet.
The Asset Exposure Analysis page displays the exposure statistics of the assets on the Internet and the details of the exposures. The following table describes the details of the exposures.
|Exposed Assets/Public IP||The total numbers of servers and IP addresses that are exposed on the Internet.|
|Gateways||The total number of gateway assets that are exposed on the Internet. The gateway assets include NAT gateways and Server Load Balancer (SLB) instances. Click the number below Gateways. In the panel that appears, you can view the gateway assets that are exposed on the Internet.|
|Exposed Ports||The total number of ports that are exposed on the Internet. Click the number below Exposed Ports. In the panel that appears, you can view the ports that are exposed on the Internet.|
|Exposed Components||The total number of server components that are exposed on the Internet. The components include OpenSSL and OpenSSH. Click the number below Exposed Components. In the panel that appears, you can view the components that are exposed on the Internet.|
|Exploitable Vul||The total number of vulnerabilities that can be exploited by attackers and the numbers of high-risk, medium-risk, and low-risk vulnerabilities. You can click the number of high-risk, medium-risk, or low-risk vulnerabilities to go to the Vulnerabilities page. The priorities of vulnerabilities are marked in different colors:
View the exposure details about an asset
The asset exposure details panel shows the communication link between assets and the Internet. You can perform the following operations to view the exposure details about an asset.
- Log on to the Security Center console.
- In the left-side navigation pane, click Asset Exposure Analysis.
- Specify filter conditions above the exposed asset list to query the assets that you want to view.
You can query the assets on which vulnerabilities are detected or no vulnerabilities are detected. You can also filter assets by asset group. Alternatively, you can enter a public IP address, port number, component name, name of your ECS instance, or ID of your ECS instance.In the upper-right corner of the exposed asset list, click the icon to export and save the exposure details of the assets to your computer. The exposure details of the assets are exported to an Excel file.Note The time that requires to export the exposure details varies based on the size of asset data.
- Find the asset that you want to view and click Exposure Details in the Operation column.
- In the panel that appears, view the communication link topology between the asset and the Internet, the details of the link, and the details of the vulnerabilities.
If your server accesses the Internet by using multiple methods, the communication link topology shows multiple paths to access the Internet. For example, if your server accesses the Internet by using NAT gateways and SLB instances, the communication link topology shows you the two communication links used to access the Internet. Click the asset on each access path to switch to the path and view the path details.Different colors of communication link topologies indicate different priorities of the vulnerabilities detected in the asset:
Note The mappings between the colors of communication link topologies and priorities of vulnerabilities apply only to your assets. The mappings do not apply to other components of the communication link topology, such as the Internet. The icon that indicates the Internet is gray by default.
- Red: indicates that high-risk vulnerabilities are detected in your asset and can be exploited by attackers over the Internet.
- Orange: indicates that medium-risk vulnerabilities are detected in your asset and can be exploited by attackers over the Internet.
- Gray: indicates that low-risk vulnerabilities are detected in your asset and can be exploited by attackers over the Internet.
- Green: indicates that no vulnerabilities that can be exploited by attackers over the Internet are detected in your assets.
- Optional:Click a vulnerability name. On the Application tab of the Vulnerabilities page, you can view the details of the application vulnerability.
In the vulnerability list that shows the application vulnerabilities detected in the asset, you can view the details of the vulnerabilities and manually fix the vulnerabilities based on the fix suggestions. We recommend that you fix high-risk vulnerabilities at the earliest opportunity. For more information, see Application vulnerabilities.