Description

The firewall security verifications either do not exist or can be bypassed.

Impact

Bypass security validations to perform different attacks.

Recommendation

Guarantee that firewall security mechanisms and access rules are active and cannot be bypassed.

Threat

Anonymous attacker from the Internet.

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

Temporal

• Exploit code maturity: H
• Remediation level: U
• Report confidence: C

Result

• Vector string: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:H/RL:U/RC:C
• Score:
• Base: 3.7
• Temporal: 3.7
• Severity:
• Base: Low
• Temporal: Low

Score 4.0

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

Base 4.0

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

Threat 4.0

• Exploit maturity: A

Result 4.0

• Vector string: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:A
• Score:
• CVSS-BT: 6.3
• Severity:
• CVSS-BT: Medium

Compliant code

The firewall is safely configured over a secure port

                gateway: "My gateway name"
firewall_service:
  enabled: true
  policy: 'drop'
  log_default_action: true
  firewall_rules:
- :id: '1'
    :enabled: true
    :description: 'disallow_connections'
    :policy: 'disallow'
    :destination_port_range: '5353'
    :destination_ip: '00.01.02.03'
    :source_port_range: '5353'
    :source_ip: 'Any'

            

Non compliant code

The firewall configuration allows insecure port connections through its configuration files

                gateway: "My gateway name"
firewall_service:
  enabled: true
  policy: 'drop'
  log_default_action: true
  firewall_rules:
- :id: '1'
    :enabled: true
    :description: 'allow_connections'
    :policy: 'allow'
    :destination_port_range: '*'
    :destination_ip: '00.01.02.03'
    :source_port_range: '*'
    :source_ip: 'Any'

            

Requirements

• 062.Define standard configurations
• 266.Disable insecure functionalities
• 273.Define a fixed security suite

Fixes

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