Subnet Solutions Inc. PowerSYSTEM Center

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1. EXECUTIVE SUMMARY

• CVSS v3 7.5
• ATTENTION: Exploitable remotely/Low attack complexity
• Vendor: Subnet Solutions Inc.
• Equipment: PowerSYSTEM Center
• Vulnerabilities: Server-Side Request Forgery (SSRF), Inefficient Regular Expression Complexity, Cross-Site Request Forgery (CSRF)

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could result in an attacker bypassing a proxy, creating a denial-of-service condition, or viewing sensitive information.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of PowerSYSTEM Center are affected:

• PowerSYSTEM Center: PSC 2020 v5.21.x and prior

3.2 Vulnerability Overview

3.2.1 SERVER-SIDE REQUEST FORGERY (SSRF) CWE-918

Vulnerable versions of PowerSYSTEM Center utilize Axios NPM package 0.21.0, which contains a Server-Side Request Forgery (SSRF) vulnerability where an attacker is able to bypass a proxy by providing a URL that responds with a redirect to a restricted host or IP address.

CVE-2020-28168 has been assigned to this vulnerability. A CVSS v3 base score of 5.9 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N).

3.2.2 INEFFICIENT REGULAR EXPRESSION COMPLEXITY CWE-1333

Vulnerable versions of PowerSYSTEM Center utilize Axios, which is vulnerable to Inefficient Regular Expression Complexity.

CVE-2021-3749 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has bee

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