CVEs The Importance of Software Updates in Mitigating CVEs

Learning objective: By the end of this lesson, students will be able to discuss the importance of timely software updates.

Why software updates matter

When you hear the term Software Update, what do you think of? Software updates are essential because they allow developers to patch vulnerabilities, add features, improve performance, or fix bugs.

Some updates will only target one or two of these areas. However, others may include a combination of all four. For example, most operating system updates will include security patches.

The risks of delayed updates

Take a moment to reflect on your experience with software updates. Think of the last time you received an alert asking you to update your computer’s operating system. Did you respond to it immediately or put it off? How often do you update the apps on your phone or computer?

People and organizations often delay updating for various reasons, usually because they worry that updates will interrupt their work or take too long. However, installing updates as soon as possible is crucial because they often fix bugs and security oversights.

Hackers often take advantage of known CVEs quickly after disclosure. An unpatched vulnerability can escalate into more severe security issues, such as exposing private information or disrupting services.

The cost of ignoring software updates

Imagine your workplace delays a vital security update, leaving a known vulnerability exposed. Soon after, a ransomware attack spreads because that critical update was put off.

Your organization could have prevented this situation by following these best practices:

Always check for new security risks by monitoring CVEs.
Promptly install updates that patch vulnerabilities to ensure systems remain secure.
Use automated systems to manage updates and regularly scan for vulnerabilities.
Educate all employees on the importance of timely software updates to reduce the risk of poor decision-making.
Develop and maintain an incident response plan to deal with security breaches.

Taking proactive measures and using information from CVEs can help prevent serious problems and keep everything running smoothly.

Real-world example: `CVE-2017-0144`

The WannaCry ransomware attack (2017) exploited a Windows SMB (Server Message Block) vulnerability, causing billions of dollars in damage. Microsoft released a patch two months earlier, but many organizations delayed updating their systems.

Some organizations, especially those with 24/7 operations such as hospitals, concluded that the risk of disrupting essential services by taking systems down to apply patches outweighed the perceived threat of an attack.

Best practices for timely software updates

Let’s review some actions organizations can take to secure their systems while reducing fears such as downtime and regressions.

Stay informed: Check for updates from software vendors regularly and use vulnerability feeds, such as the National Vulnerability Database (NVD), to stay ahead.
Automate when possible: Enable automatic updates for critical systems to apply patches promptly.
Test in controlled environments: Test updates for enterprise systems in staging environments to prevent downtime.
Patch management policy: Prioritize updates based on CVSS severity scores and establish a process of identifying, testing, and deploying updates across all affected systems.