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This document covers the various scoring calculations and methods used for the Asset(s) Risk Scoring and various point systems for assets. |
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Severity and Risk Scoring Descriptions
Severity
This indicates the seriousness or criticality of a vulnerability. Common severity levels include low, medium, high, and critical. Higher-severity vulnerabilities typically pose a greater risk and require immediate attention and mitigation.
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Collect as much vulnerability information as we can from a variety of sources
Collect evidence of daily exploitation activity
Train a model: discover/learn the relationship between the vulnerability information and the exploitation activity
Measure the performance of the model, tweak and repeat step 3 to optimize the model
On a daily basis: refresh the vulnerability information (step 1) and use the model (step 3) to produce daily estimates of the probability of exploitation in the next 30 days for each published CVE.
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How is Severity Calculated?
Severity information is imported from the standard vulnerability databases.
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How is EPSS Calculated?
You can find the general calculation on EPSS in the link below:
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https://epss.cyentia.com/epss_scores-current.csv.gz
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Asset Risk Scoring Details
Assets are scored individually and assigned a letter grade: A, B, C, D, E, or F, just like in grade school. Tap on the letter grade of any asset to see the Rubrix breakdown of how we score based on vulnerabilities.
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Asset Average Risk Score Calculation
The sum of present Problem Category scores divided by the sum of all Severity Problem Category scores + other Problem Category Scores that are present.
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20 = 250 (Sum of Severity Categories) / 50 (Total Weightage of Problem Categories that Exist)
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External Scan Risk Scoring Details
External Assets are configured and maintained at the Compan level under the portal's Assets > External Assets section. The Results tab displays a table view of any scanned asset with details that include various details along with the Security Grade.
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Tap on the external asset IP to see the details:
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Tap directly on the letter grade assigned to see the scoring details:
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External Scan Risk Score Calculation
The sum of the present Problem Category scores divided by the sum of all Severity Problem category scores and other Problem Category score(s) if present.
The Severity Problem Category refers to the severity-based vulnerability classifications below.
We use these base weights for the Risk Score calculations based on ‘severity.' The total score for all severity category groups is 250. (90+80+50+30).
Critical Severity Vulnerabilities = .90 (or 90%)
High Severity Vulnerabilities = .80 (or 80%)
Medium Severity Vulnerabilities = .50 (or 50%)
Low Severity Vulnerabilities = .30 (or 30%)
To obtain your asset’s present Problem Category scores, tap on the letter grade, check for the ‘Exists?’ column for a 'Y' and add that Score value up. See below for a sample.
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Pay attention to the ‘Exists’ to determine if the ‘Weightage’ is included in the sum calculations.
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In the above example, the Asset Risk Score is shown as 60.
Add up the total Score for any Problem Category where vulnerabilities Exist. (260)
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2. Divide that by the Sum of all the Severity Problem Category scores + any other Problem Category Score if present)
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The sum of the present Problem Category scores is 260
The sum of the Severity Problem Categories plus other present is 430 (250+180)
260 / 430 = .60% or 60
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Only confirmed vulnerabilities are considered. Only Insecure Open ports are considered; Filtered Ports are not considered. |
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Security and Compliance Report Card Grading
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The table values below are used for our Security Report Card and Compliance Report Card grades. |
Category | Grades | Description |
Antivirus | 5 | Anti-virus is installed and up to date |
4 | Anti-virus is installed but not up to date | |
1 | Anti-virus is not installed | |
Local Firewall | 5 | Local firewall is enabled for both public and private networks |
4 | Local firewall is not enabled for private networks | |
3 | Local firewall is not enabled | |
1 | Local firewall is not enabled | |
Insecure Listening Ports | 5 | There are no insecure listening ports |
3 | One insecure listening port detected | |
1 | More than one insecure listening port detected | |
Failed Login | 5 | No failed interactive logins in the past 7 days |
4 | 7 or fewer failed interactive logins in the past 7 days | |
3 | 14 or fewer failed interactive logins in the past 7 days | |
1 | 15 or more failed interactive logins in the past 7 days | |
Network Vulnerabilities | 5 | No network vulnerabilities |
4 | Low network vulnerabilities found (CVSS < 4.0) | |
3 | Medium network vulnerability found (CVSS >= 4.0) | |
1 | Critical network vulnerability found (CVSS >= 9.0) | |
System Aging | 5 | All computers are less than 2 years old |
4 | Some computers between 3 and 4 years old | |
3 | Some computers between 4 and 7 years old | |
1 | Some computers over 8 years old | |
Supported OS | 5 | All computers have supported Operating Systems |
4 | Some Operating Systems are in extended support | |
3 | Some Operating Systems are within 1 year of end of life | |
1 | Some unsupported Operating System | |
LLMNR | 2 | LLMNR not Allowed |
5 | LLMNR Disabled | |
1 | LLMNR Enabled | |
NBTNS | 2 | NBTNS not Allowed |
5 | NBTNS Disabled | |
1 | NBTNS Enabled | |
NTLMV1 | 2 | NTLMV1 not Allowed |
5 | NTLMV1 Disabled | |
1 | NTLMV1 Enabled | |
SMBV1Server | 2 | SMBV1 Server not Allowed |
5 | SMBV1 Server Disabled | |
1 | SMBV1 Server Enabled | |
SMBV1Client
| 2 | SMBV1 Client not Allowed |
5 | SMBV1 Client Disabled | |
1 | SMBV1 Client Enabled | |
SMB Signing | 2 | SMB Signing Disabled |
5 | SMB Signing Enabled | |
1 | SMB Signing Disabled |
Security Report Card
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Compliance Report Card
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End of Life
ConnectSecure checks against Assets to categorize end-of-life (EOL) in two ways.
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This is found in the Problem Group of ‘Informational’ as shown in the example below:
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Risk Level Descriptions for EOL on Active/Security Support
Level | Description |
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1 | Both Active and Security Support have ended; no support is available |
3 | If the operating system is within 1 year of its security support end date; limited support |
4 | If the operating system is within its Active support but past its Security support; extended support |
5 | If the operating system is within both Active and Security support timelines; full support |
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Need Support?
Contact our support team by sending an email to support@connectsecure.com or by visiting our Partner Portal, where you can create, view, and manage your tickets.
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