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Insecure service configuration - SSH


The SSH service is not filtered by the Firewall to avoid external attacks and possible intrusions through this service.


Attempt to access the server through brute force attacks or 0-day exploits.


Securely configure the vulnerable service so that it can only be accessed by authorized users.


External attacker without credentials.

Expected Remediation Time

⌚ 60 minutes.


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


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


  • Exploit code maturity: X
  • Remediation level: O
  • Report confidence: X


  • Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:O/RC:X
  • Score:
    • Base: 5.3
    • Temporal: 5.1
  • 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: N
  • Attack complexity: L
  • Attack Requirements: N
  • Privileges required: N
  • User interaction: N
  • Confidentiality (VC): L
  • Integrity (VI): N
  • Availability (VA): N
  • Confidentiality (SC): N
  • Integrity (SI): N
  • Availability (SA): N

Threat 4.0

  • Exploit maturity: X

Result 4.0

  • Vector string: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X
  • Score:
    • CVSS-BT: 6.9
  • Severity:
    • CVSS-BT: Medium

Compliant code

The service only allows safe access to certain users

name: "myhost""
AddressFamily: any
AllowAgentForwarding: false
AllowTcpForwarding: true
ListenAddress: {{ ansible_default_ipv4.address }}:{{ ssh_port | default('22') }}
PubkeyAuthentication: true
//Firewall configuration
ansible_port: "{{ ssh_port | default('22') }}"
remote_user: sven
become: true
- hostnames
- users
- ssh
- my.firewall
- 80
- 443
- 5930

Non compliant code

There is a resource with an SSH configuration allowing any address

name: "myhost""
AddressFamily: any
AllowTcpForwarding: true
ListenAddress: any



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