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The Role of Attack Surface Management (ASM) in Cybersecurity

Why Attack Surface Management is Integral for Your Exposure Management Strategy

Your modern attack surface consists of all the potential points of contact an attacker may attempt to access within your IT environment. Attack surface management (ASM) is a process that enables your organization to get comprehensive visibility automatically and continuously into your assets so you're always aware of what you have, how they're being used and where they may have any vulnerabilities or security issues—from a user and attacker's point of view. Attack surface management enables your security teams to seek out security issues, prioritize remediation, and stay one step ahead of attackers.

In this knowledgebase, we’ll help you better understand the role of attack surface management as a cybersecurity best practice.

Vulnerability Management for Everyone

Here’s what you’ll discover:

Dealing with Your Attack Surface Beyond Vulnerabilities

Get a more realistic view of your cyber exposures and rethink how you define your attack surface.

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Attack Surface Management Frequently Asked Questions

Explore answers to frequently asked questions about attack surface management and its benefits as a cyber strategy.

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Attack Surface Management Solutions

Empower your teams to proactively seek out likely attacks with a single, unified view of your attack surface.

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Tenable Connect community for Attack Surface Management

Tenable Connect is a great place to connect with other security professionals and talk about all things related to ASM.

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Exposure Management for the Modern Attack Surface

The Tenable One Exposure Management Platform can help you discover all of your assets so you can understand all of your exposures, prioritize which cyber risks mean most to your organization, and prioritize remediation to prevent likely attacks.

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Protecting State and Local Governments Against Ransomware

Ransomware attacks are on the rise. Attack methods are more complex, and cybercriminals are more resourceful. No longer are threat actors looking only to gain access to your network through an exploit. Attacks today can spread malware across your entire enterprise. Attackers are banking on that they can move laterally undetected long before you realize they’re there. That’s why your organization needs a strong, proactive cybersecurity defense—especially if you’re a government agency. Any device, application, operating system or network is at risk, and you can’t stop these threats if you don’t know where they are. A proactive defense begins with insight into all of your assets and security weaknesses, so you can predict where you have the greatest cyber exposures and then prioritize how you’ll address them.

With Tenable, you can defend your organization against ransomware attacks by finding and addressing flaws before attackers can access them.

Attack Surface Monitoring Insight

Don’t Ignore Attack Surface Management

As your organization embraces more remote work, distributed computing, IoT deployments and cloud adoption, your attack surface grows. As such, you can no longer ignore attack surface management as part of your exposure management strategy. It’s one of the top six things in cybersecurity that needs your attention today. In this Cybersecurity Snapshot, see what the other five hot topics are and explore why ignoring attack surface management now can leave your organization in peril.

Finding the 'Unknown Unknowns' Across Your Entire Attack Surface

If your organization doesn’t have insight into all of your assets, vulnerabilities, misconfigurations and security issues, you can’t protect them. These “unknown unknowns” often keep security teams awake at night. Without insight into all of your cyber exposures, you’re leaving doors open for attackers to step right through, all while increasing your cyber risks.

These “unknown unknowns” are often hidden in your assets with internet-facing connections. When these assets are in a public space—especially when you don’t know about them—it creates more opportunities for attackers looking for quick and easy exploits.

With an attack surface management strategy, your organization can get to the heart of this issue by continuously scanning and monitoring all of your public-facing assets. With this information, you can have clear visibility into your assets, no matter where they are, turning those unknowns into the known so you can address them.

Tenable Connect community: Your go-to resource for attack surface monitoring

Tenable Connect is a great resource for information about attack surface monitoring. Whether you have questions for other exposure management professionals or you’re looking to take a deeper dive into how Tenable can help you gain more visibility into your attack surface so you can manage it, Tenable Connect is the place to be.

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How can we automatically scan all externally facing services on AWS?

We have AWS connector configured, and this shows all our EC2 instances and we're able to use this to scan private instances within our VPC. However, what we'd like to do is automatically scan all public-facing IP addresses in AWS on a continuous basis… Is this possible with Tenable? How do other people monitor the external attack surface?

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Close your Cyber Exposure Gap and Protect Your Attack Surface

Networks and attack surfaces are changing fast. Today, there’s so much more than servers, network devices and endpoints. Now you’re responsible for securing everything from cloud platforms and application containers to Internet of Things (IoT) devices, and perhaps operational technology (OT) systems. How can you manage it all?

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Compare Vulnerabilities Between Hosts to Determine Elevated Risk Levels

We have multiple servers going live in our org, and all report multiple informational-level weaknesses. While eliminating each would not be practical, the combination of all weaknesses existing together may allow a bad guy to gather more data of the potential attack surface. I'm looking for a plugin or scan strategy that can identify and report such weaknesses...

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Frequently Asked Questions About Attack Surface Management

Are you new to attack surface management? Do you have questions, but not sure where to start? This attack surface management FAQ has the basics:

What is an attack surface?

An attack surface consists of all the potential points of contact an attacker may attempt to access within your IT environment. Many security professionals think of the attack surface in terms of opportunities for attacks. There are a growing number of asset types that make up the modern attack surface, for example: networks, desktop computers, laptops, tablets, smart phones, printers, firewalls, servers and other devices, applications and systems both on-premises and in the cloud. It originates from a network perspective of an adversary, the complete external asset inventory of an organization, including all actively listening services (open ports) on each asset.

What is attack surface management?

Attack surface management (ASM) is a process that enables your organization to get comprehensive visibility (automatically and continuously) into your assets so you're always aware of what you have, how assets are used and where there are vulnerabilities or security issues—from a user and attacker's point of view. Attack surface management applies to both your digital attack surface (for example, applications, websites, open ports, operating systems, etc.) as well as your physical attack surface (such as all of your desktop computers, mobile devices, laptops, etc.).

What does attack surface management do?

Attack surface management gives you comprehensive visibility into all of your assets and their associated vulnerabilities and security weaknesses. By creating an attack surface map, your security teams will be better positioned to protect these assets, even those generally considered as shadow IT. Attack surface management helps your organization better understand all of your cyber exposures so you can make actionable plans that support optimal business decisions.

What is attack surface mapping?

Attack surface mapping discovers and documents an organization’s entire attack surface. An attack surface map includes the hostnames and IP addresses of each external-facing asset, listening ports on each and meta-data about each asset such as software distribution and version information, IP-geolocation, TLS stack information and more.

What is external attack surface management (EASM)?

External attack surface management (EASM) is a capability Tenable offers that provides visibility into blind spots outside of your network perimeter. This allows you to scan your domain to find previously unknown internet-connected assets that can pose high risk to your organization.

Is external attack surface management (EASM) included in Tenable Attack Surface Management?

Yes. Tenable Attack Surface Management offers external attack surface management (EASM) capabilities. If you require additional domains, frequency and/or metadata in your results, you can purchase Tenable Attack Surface Management add-ons.

Can I use Tenable for attack surface management?

Yes. Tenable One is the perfect attack surface management tool. The exposure management platform enables your teams to identify all of your assets on any platform and provides visibility into the vulnerabilities and other security issues across your entire platform. With Tenable One your teams can focus on preventing likely attacks while accurately communicating cyber risk that supports optimal business performance.

Why is attack surface management important?

Attack surface management is important because it helps organizations identify all of its assets and their related security weaknesses. With a risk-based vulnerability management approach, organizations can then prioritize which cyber risks matter most to them so their teams can make actionable plans to reduce that risk. Attack surface management is not a one-and-done checklist item. Approach it from an ongoing and continuous perspective.

What are some attack surface examples?

Some attack surface examples include networks, desktop computers, laptops, tablets, smart phones, printers, firewalls, servers and other devices, applications and systems both on-premises and in the cloud.

Can I limit my attack surface?

Yes. You can limit your attack surface with continuous attack surface analysis and management.

What’s the difference between an attack surface and an attack vector?

There are differences between an attack surface and an attack vector. An attack surface is what a bad actor may attempt to exploit. An attack vector is how they get access to your assets.

What should an attack surface management solution do?

An attack surface management solution should simplify the way you identify and inventory all of your assets, discover all of their associated weaknesses, vulnerabilities, and misconfigurations. Seek out an attack surface management solution that gives you all of this insight, even as your attack surface changes and the threat landscape evolves, all in a single, unified platform.

How can attack surface management help decrease cyber-attacks?

Attack surface management helps decrease cyber-attacks by identifying all of your assets (including those once thought to be “unknown unknowns”) and their related vulnerabilities and security weakness so you can make an actionable plan to reduce the risks that matter most to your organization, communicate cyber exposure across your organization and help your teams make better business-focused decision based on those risks.

Know Your External Attack Surface

Discover and Assess All of Your Internet-Facing Assets and Connections

Modern attack surfaces are constantly evolving. There are more assets, more services and more applications connected to the internet, inherently creating new risks for your organization. With Tenable Attack Surface Management you can map out all of your internet-facing assets and assess their security posture.

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Attack Surface Management Blog Bytes

Dealing with the Attack Surface Beyond Vulnerabilities

Understanding your attack surface is a critical part of being able to measure and prioritize cyber risk. In this blog, explore how Tenable’s data can help you get a more realistic view of all of your cyber exposures and rethink how you define your attack surface.

Read More

How to Discover and Continuously Assess Your Entire Attack Surface

Discovery and assessment tools for each asset type across your enterprise play an important role in helping your teams eliminate network blind spots and gaining a better understanding of your attack surface. In this blog, learn more about how you can get a unified view of your attack surface to prioritize remediation.

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Protecting the Atomized Attack Surface: Cybersecurity in the New World of Work

Remote workforces and a push to move more business-critical functions into the cloud are increasing cyber exposures for organizations of all sizes. Some organizations may have even put these tools into service without any—or very immature—security controls. In this blog, explore how teams can better work together to protect your enterprise.

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Introducing Tenable One: Industry-First Exposure Management Platform

Tenable One, is an exposure management platform that unifies discovery and visibility into ​​all assets and assesses their exposures and vulnerabilities across your entire attack surface for proactive risk management. In this blog, learn more about how Tenable can help your teams with new capabilities that are foundational for exposure management.

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Proactively Address and Manage Cyber Risks with Tenable One

Attack surfaces are rapidly expanding and as such our threat landscape is constantly evolving. Many organizations, especially those who rapidly spun up new technologies and services during the pandemic may not even know about all of the assets across their organization. Some of these tools were put into use with limited security controls, and in worst cases, with no controls at all.

Without insight into your entire attack surface, your organization faces increased cyber risk. So, how do your teams get that insight they need to conduct asset inventories and understand and prioritize vulnerability management for your most critical business services?

Tenable One empowers your security teams to proactively seek out likely attacks with a single, unified view of your attack surface. Within one platform, your teams can see all of your assets and their associated vulnerabilities on-prem and in the cloud. This enables them to better predict the consequences of an attack so they can prioritize remediation with actionable results that meet your organization’s specific needs.

  • Quantify your cyber exposure
  • Disrupt attack paths
  • Eliminate blind spots
  • Compare risks internally or externally to guide business decisions

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See Tenable One in Action

With Tenable One, your teams can focus efforts on preventing likely cyber-attacks with insight into how you can accurately communicate your organization’s cyber risk for better business performance.

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