The Common Weakness Enumeration (CWE) Top 25 Most Dangerous Software Errors (CWE Top 25) is a list of what has been judged to be the most widespread and critical weaknesses that can lead to serious vulnerabilities in software. These kinds of weaknesses are often easy to find and exploit. They can be dangerous because they can frequently allow threat actors to completely take over execution of software, steal data, or prevent the software from working.
MITRE is saying that this current list is data driven in how it has been approached; using Common Vulnerabilities and Exposures (CVE) data and related CWE mappings that are found within the National Institute of Standards and Technology (NIST) National Vulnerability Database (NVD), as well as the Common Vulnerability Scoring System (CVSS) scores associated with each of the CVEs. A scoring formula was then applied by MITRE to determine the level of prevalence and danger each weakness presents.
At the time of the last list compilation eight years ago, the top spot of the list was taken by SQL injection techniques. The 2011 list was constructed by a different method; from surveys conducted of developers, top security analysts, researchers and vendors. It involved some subjectivity on the part of those surveyed.
But this year, it's "Improper Restriction of Operations within the Bounds of a Memory Buffer" as top dog which shows the changes that have happened to the list. The current top spot is a class level of wide-ranging errors, not one bugaboo. The data-driven approach to generating the list gave rise to solidifying root causes of multiple vulnerabilities into one class-level description.
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