Tenable Nessus is a widely used, open source vulnerability assessment tool. It is probably best as a managed service for IT departments lacking cybersecurity expertise. Known vulnerability signatures are updated continually as new vulnerabilities are identified by AlienVault Labs and Open Threat Exchange intelligence community. The vulnerability scanner is part of a larger tool that also includes SIEM and intrusion detection. It helps detect security vulnerabilities in systems, web applications and network devices. The AT&T Cybersecurity Vulnerability Scanning Solution can be delivered either as a managed service or run from within IT. Pricing may be higher than some other services but the breadth of protection it offers is extensive. Its intuitive and customizable dashboard provides a unified view of all web apps and assets being monitored. In addition, it scans containers and endpoints. The Qualys Vulnerability Management scanner operates behind the firewall in complex internal networks, can scan cloud environments and can also detect vulnerabilities on geographically distributed networks at the perimeter. Leading Vulnerability Management Solutions There are also many open source vulnerability scanning tools. And increasingly, tools like IT asset management (ITAM) are needed to make sure you’re patching everything you have. Vulnerability management is a broader product that incorporates vulnerability scanning capabilities, and a complementary technology is breach and attack simulation, which allows for continuous automated vulnerability assessment. Vulnerability scanning should not be confused with penetration testing, which is about exploiting vulnerabilities rather than indicating where potential vulnerabilities may lie. Some scans are done by logging in as an authorized user while others are done externally and attempt to find holes that may be exploitable by those operating outside the network. Typically, the scan compares the details of the target attack surface to a database of information about known security holes in services and ports, as well as anomalies in packet construction, and paths that may exist to exploitable programs or scripts. Scans can be performed by the IT department or via a service provider. Vulnerability scanners detect and classify system weaknesses to prioritize fixes and sometimes predict the effectiveness of countermeasures. Vulnerability scanning tools can make that process easier by finding and even patching vulnerabilities for you, reducing burden on security staff and operations centers. To that end, an essential IT security practice is to scan for vulnerabilities and then patch them, typically via a patch management system. Vulnerability scanning, assessment and management all share a fundamental cybersecurity principle: the bad guys can’t get in if they don’t have a way.
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