Description

It is possible to supersede other MAC addresses in the network because the associated switch lacks protection mechanisms, such as PortSecurity.

Impact

- Steal sensitive information.
- Facilitate other attacks such as Denial-of-Service DoS attacks, session hijacking and man-in-the-middle MitM attacks.

Recommendation

Set network controls (PortSecurity) in the affected switches.

Threat

Attacker from the Internet performing a MitM attack.

Expected Remediation Time

⌚ 60 minutes.

Score

Default score using CVSS 3.1. It may change depending on the context of the src.

Base

• Attack vector: A
• Attack complexity: H
• Privileges required: L
• User interaction: N
• Scope: U
• Confidentiality: H
• Integrity: H
• Availability: L

Temporal

• Exploit code maturity: P
• Remediation level: W
• Report confidence: X

Result

• Vector string: CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L/E:P/RL:W/RC:X
• Score:
• Base: 6.7
• Temporal: 6.2
• Severity:
• Base: Medium
• Temporal: Medium

Score 4.0

Default score using CVSS 4.0. It may change depending on the context of the src.

Base 4.0

• Attack vector: A
• Attack complexity: H
• Attack Requirements: N
• Privileges required: L
• User interaction: N
• Confidentiality (VC): H
• Integrity (VI): H
• Availability (VA): L
• Confidentiality (SC): N
• Integrity (SI): N
• Availability (SA): N

Threat 4.0

• Exploit maturity: P

Result 4.0

• Vector string: CVSS:4.0/AV:A/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:P
• Score:
• CVSS-BT: 6.6
• Severity:
• CVSS-BT: Medium

Compliant code

All switches should have the port security enabled

                server {
  index: "index.html";
  listen: "localhost:4446 ssl";
  server_name: "localhost";
  port {
    port-number: "4446";
    port-security:enabled;
  }
}

            

Non compliant code

There is a switch with port-security disabled

                server {
  index: "index.html";
  listen: "localhost:4446 ssl";
  server_name: "localhost";
  port {
    port-number: "4446";
    port-security: disabled;
  }
}

            

Requirements

• 062.Define standard configurations
• 273.Define a fixed security suite

Fixes

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