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Security controls bypass or absence - Firewall

Description

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

Impact

Bypass security validations to perform diferent 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 vulnerability.

Base

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

Temporal

  • Exploit code madurity: 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

Code Examples

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_conections'
: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_conections'
:policy: 'allow'
:destination_port_range: '*'
:destination_ip: '00.01.02.03'
:source_port_range: '*'
:source_ip: 'Any'

Requirements