Secure Network Design
DHN1: Secure Network Design Company A Risk Analysis
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Company A Risk Analysis
Company A performed an internal risk analysis in anticipation of system integration with Company B. This risk analysis was performed in accordance with NIST SP 800-30 Rev 1 to identify the following:
• vulnerabilities
• risk likelihood
Table A. Risk Classifications
|
Risk Level |
Description |
|
High |
The loss of confidentiality, integrity, or availability may be expected to have a severe or catastrophic adverse effect on organizational operations, organizational assets, or individuals. |
|
Moderate |
The loss of confidentiality, integrity, or availability may be expected to have a serious adverse effect on organizational operations, organizational assets, or individuals. |
|
Low |
The loss of confidentiality, integrity, or availability may be expected to have a limited adverse effect on organizational operations, organizational assets, or individuals. |
Table B. Data Sensitivity
|
Type of Data |
Sensitivity |
||
|
|
Confidentiality |
Integrity |
Availability |
|
Customer PII (e.g., Account Numbers, Social Security Numbers, and Phone Numbers) |
High |
High |
Moderate |
|
Employee PII (e.g., Social Security Numbers and Employee Identification Numbers) |
High |
High |
Moderate |
|
Company intellectual property (e.g., credit scoring calculations) |
High |
High |
Moderate |
|
Marketing and advertising |
Moderate |
Moderate |
Low |
Table C. System Inventory
|
System Components |
|
|
Servers |
Windows server 2019; role: internal SharePoint server Windows server 2019; role: Exchange server Windows server 2012; role: Application server Windows server 2012R2; File server DMZ Windows server 2012; role: FTP and external Web Server |
|
Workstations |
75 - Windows 10 Pro 20 - configured for remote desktop access |
|
Switches |
4 - Cisco 3750X
|
|
Firewall |
Fortinet’s Fortigate 800D NGFW |
|
Border router |
Cisco 7600 |
|
Laptops
|
14 - Windows 7 6 - Windows 11 |
|
Wireless Access Points |
2 - Meraki MR28 |
|
Cable plant |
Cat5e |
Table D. Risk Identification
|
Risk # |
Vulnerability |
Risk Likelihood |
|
1 |
Open ports 21-90, 3389 |
High |
|
2 |
All users use eight-character passwords |
High |
|
3 |
User accounts no longer required are not removed |
Moderate |
|
4 |
All users have local administrative privileges |
Moderate |
|
5 |
Regular password changes are not enforced |
Moderate |
|
6 |
End-of-Life Equipment in use |
Low |