Digital security stands as one of the most pressing issues of our time. In an era marred by frequent cyber attacks, seamlessly managing an organization’s external-facing digital assets has become an absolute necessity.
This article takes a deep dive into the concept and applications of External Attack Surface Management (EASM) and its role in mitigating cybersecurity risks and enhancing efficiency in vulnerability management.
In simple terms, today’s businesses exist in perpetually aggressive digital landscapes. The threats arising from these landscapes – cyber attacks – have grown at an alarming pace, fueling the need for robust cybersecurity measures.
These realities underscore the relevance and importance of efficient vulnerability management – a sequence of processes that shields an organization’s digital assets while mitigating threats from external attacks.
Breaking this down further, the efficiency lies in the proactive identification, evaluation, and mitigation of vulnerabilities. Any organization must go beyond its known network ranges and delve into the deep chasms of its digital environment to gain genuine insights into the potential risks. However, the digital environment is dynamic – ever-changing in its form and constituents.
Much like the shadows cast by high-rise skyscrapers in an urban cityscape, “shadow IT” casts a tricky light on these evolving architectures. Making it pivotal to maintain a continuous monitoring system that effortlessly tracks these changes in real time, enabling preemptive action against potential attacks.
The continuous evolution of “attack vectors” – paths or routes used by cybercriminals to infiltrate organizations, demands a matching swift response from the defenders. In essence, a game of cat and mouse is at play on the digital plane, where the defenders must always be one step ahead. Meeting this demand, therefore, requires the implementation of protocols that optimize resource allocation and script a model for efficient data breach prevention.
Entrusted with the task of safekeeping digital assets, EASM serves as the perpetual guardian and sentry, responsible for this daunting task of prevention and protection. Every time a company adds a public cloud service or a group of IoT devices to their structure, they’re effectively expanding their “attack surface” – the sum total of all potential points where an unauthorized user can break into a system.
What is External Attack Surface Management?
EASM, then, can be defined as a continuous effort to manage an organization’s external-facing digital assets. It is laden with responsibility, tasked with discovering and identifying these assets, evaluating the risk they pose, prioritizing these risks, and then undergoing remediation measures. Essentially, it constitutes an ongoing sequence of proactive operations that safeguard against cyber threats.
EASM is the journey an organization undertakes into the labyrinth of its ever-growing digital footprint. This footprint sprawls across servers, cloud environments, and an array of software assets. While the vastness and complexity might seem overwhelming, efficient EASM translates this complexity into a well-defined network perimeter, fortifying its structure.
If we delve deeper to dissect this journey, we’ll discover that it begins with unveiling the ‘asset inventory.’ Every server, web application, public IP address, cloud service, and domain name affiliated with an organization contributes to its extensive network of digital assets.
Acquiring complete visibility into these assets and their associated risks is no small feat and requires specialized tools like external attack surface management solutions. These solutions are designed to monitor assets, spot misconfigurations that might afford an access path to cybercriminals, and enable process automation to ensure swift remediation.
This journey extends toward the exploration of the organization’s association with third-party vendors. Such partnerships potentially expand the organization’s attack surface. Issues often emerge with the lack of visibility into security issues associated with vendors’ assets. Therefore, a vital part of EASM includes tracking these vendor security postures, monitoring the security ratings, and maintaining an inventory of assets managed by these third-party vendors.
Ensuring cyber hygiene, a crucial factor driving EASM, involves minimizing the attack surface. Methods such as retiring unused tools, updating legacy systems and ensuring that operating systems and protocols are up-to-date are of utmost importance. As it is, hygiene is not just a matter of concern in the physical sense; in the cyberspace too, it holds an equally pressing need.
EASM uses a variety of tools and techniques to deliver results. Vulnerability scanners help identify weak points in the network perimeter that could potentially be exploited during an attack. Similarly, the efficiency of EASM relies heavily on autonomous identification, classification, and remediation advice for vulnerabilities.
In conclusion, External Attack Surface Management is not only about identifying and managing known assets but also about discovering unknown exposures which often lie hidden in the organizational blind spots. It is a comprehensive process that requires continuous monitoring, automatic risk prioritization, and streamlined operations to ensure efficient security posture management.
Challenges in External Attack Surface Management
Navigating the universe of EASM involves a number of challenges. These include dealing with the grand scale and intricacy of an organization’s digital footprint, wrestling with the invisibility of internet-connected assets, and overcoming the constantly changing external attack surface, among others.
One primary hurdle lies in achieving comprehensive visibility of the organization’s digital assets. These assets include servers, cloud environments – both on-premise and public, software assets, Shift to the Cloud communication between internal networks and the internet, and applications (web and otherwise), among others.
Complicating this issue is the fact that an organization’s total assets also include critical aspects such as SSL certificates, decentralized and distributed IT ecosystems (including DevOps and IoT devices), as well as ephemeral IP addresses. Gaining insight into these assets as well as monitoring these in real-time for any new exposures is a daunting task.
Another key challenge is understanding and managing third-party vendor security postures and dealing with risks associated with these entities. EASM’s challenge is not simply managing an organization’s external attack surface. Rather, it is also about keeping track of the assets managed by third-party vendors and ensuring that they comply with IT and security policies is of utmost concern.
Importance of External Attack Surface Management
EASM assumes a pivotal role in improving an organization’s cybersecurity efforts. By providing comprehensive visibility and monitoring for an organization’s external attack surface, it paves the way for efficient mitigation of potential cyber threats posed by unknown risks and exposures hidden in the organizational blind spots. ESM solutions, like Microsoft Defender External Attack Surface Management and UpGuard’s Attack Surface Management platform, enable continuous monitoring and automatic risk prioritization, thereby streamlining operations and optimizing IT and security costs.
Through EASM, organizations gain unprecedented visibility into their digital assets, internet-facing inventory, and communication between their internal network and the internet. They gain insights into their digital footprint, bridging the gap between siloed teams and enabling them to connect and organize data effectively. This comprehension, in turn, opens avenues for a more robust cyber defence posture.
Efficiency in Mitigation
Efficiency in EASM hinges upon effective resource allocation, identifying and reducing vulnerabilities, and proactive protection against cybercriminals and external threat actors. Automating and optimizing processes such as continuous external surface monitoring, tracking inventory changes, fault correction, and mitigation enhances the efficiency of EASM.
EASM’s efficiency is also showcased in the swift identification of assets – whether registered or unregistered, permanent or ephemeral – an understanding of their risk profiles and providing remediation advice. The quicker an organization can identify assets, the faster it can act to secure them.
Moreover, EASM’s ability to coordinate with internal teams as well as third party vendors around data breach prevention programs ensures that potential risks are minimized, and, in case of incidents, appropriate remediation steps are initiated swiftly and efficiently.
The EASM’s capabilities for real-time measurement and prioritization of vulnerabilities provide invaluable advantages in mitigating risks.
External Attack Surface Management
Recognizing the escalating cybersecurity risks and embracing the virtues of External Attack Surface Management are essential components for any modern business.
By ensuring continuous discovery, monitoring, prioritization, and management of an organization’s external-facing digital assets, they can successfully optimize their cyber defense and maximize the effectiveness of their mitigation efforts.
Regardless of the business’s orientation – whether focused on marketing, servers and software, or shifting to IoT and the cloud – EASM consistently delivers results.
It boosts cybersecurity by shielding valuable digital entities, reducing vulnerabilities, fortifying cyber defense, and streamlining operations. In the perpetual digital landscape, where cyber threats never relent, efficient EASM stands as the front-line guardian that organizations can rely on.
