November 2, 2023 at 05:30AM
The Forum of Incident Response and Security Teams (FIRST) has announced CVSS v4.0, the next generation of the Common Vulnerability Scoring System standard. This update aims to provide a more accurate assessment of vulnerabilities and introduces new metrics for assessment. It also emphasizes that CVSS should not be the sole factor in assessing risk.
Key takeaways from the meeting notes on the CVSS v4.0 announcement by the Forum of Incident Response and Security Teams (FIRST) are as follows:
1. CVSS v4.0 is the next generation of the Common Vulnerability Scoring System standard, released more than eight years after CVSS v3.0.
2. The purpose of CVSS is to provide a numerical score for assessing the severity of security vulnerabilities.
3. The scores can be translated into different levels (low, medium, high, critical) to help organizations prioritize vulnerability management processes.
4. CVSS v3.1 emphasizes that it should not be used alone to assess risk and has been criticized for lacking granularity and not adequately representing health, human safety, and industrial control systems.
5. CVSS v4.0 aims to address some of the shortcomings by introducing supplemental metrics for vulnerability assessment, such as Safety (S), Automatable (A), Recovery (R), Value Density (V), Vulnerability Response Effort (RE), and Provider Urgency (U).
6. It also introduces a new nomenclature to enumerate CVSS scores using Base (CVSS-B), Base + Threat (CVSS-BT), Base + Environmental (CVSS-BE), and Base + Threat + Environmental (CVSS-BTE) severity ratings.
7. It is important to supplement the CVSS Base Score with an analysis of the environment (Environmental Metrics) and attributes that may change over time (Threat Metrics).
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