Insecure service configuration - SSH
Description
The SSH service is not filtered by the Firewall to avoid external attacks and possible intrusions through this service.
Impact
Attempt to access the server through brute force attacks or 0-day exploits.
Recommendation
Securely configure the vulnerable service so that it can only be accessed by authorized users.
Threat
External attacker without credentials.
Expected Remediation Time
⌚ minutes.
Score
Default score using CVSS 3.1. It may change depending on the context of the src.
Base
- Attack vector: N
- Attack complexity: L
- Privileges required: N
- User interaction: N
- Scope: U
- Confidentiality: L
- Integrity: N
- Availability: N
Temporal
- Exploit code madurity: X
- Remediation level: O
- Report confidence: X
Result
- 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
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
hosts: myhost.com
vars:
ansible_port: "{{ ssh_port | default('22') }}"
remote_user: sven
become: true
roles:
- hostnames
- users
- ssh
- my.firewall
firewall_allowed_tcp_ports:
- 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
Requirements
Fixes
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