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Nuclei Templates

Limit SSH Users Access

ID: file-limit-ssh-users-access

Severity: unknown

Author: pussycat0x

Tags: audit,config,file,ssh

Description

Section titled “Description”

Restricting SSH user access improves security by allowing only authorized users to connect, reducing the risk of unauthorized logins and potential attacks.

YAML Source

Section titled “YAML Source”
id: file-limit-ssh-users-access


info:
  name: Limit SSH Users Access
  author: pussycat0x
  severity: unknown
  description: |
    Restricting SSH user access improves security by allowing only authorized users to connect, reducing the risk of unauthorized logins and potential attacks.
  remediation: |
    Restrict SSH access by configuring AllowUsers or AllowGroups in /etc/ssh/sshd_config and restart the SSH service.
  reference:
    - https://vishalraj82.medium.com/hardening-openssh-security-37f5d634015f
    - https://cloud.ibm.com/docs/ssh-keys?topic=ssh-keys-granting-ssh-access-to-a-user
  metadata:
    verified: true
  tags: audit,config,file,ssh


file:
  - extensions:
      - all


    matchers-condition: and
    matchers:
      - type: word
        words:
          - "# This is the sshd server system-wide configuration file"


      - type: word
        words:
          - "AllowUsers"
        negative: true
# digest: 4a0a00473045022100d4653c20bd62d6002b435d4eabe0d4c380a9995ffd37827139cd2f705abee49202205e31667183e2c8327613b0c8875101d12ee7827b5189f13ada6b246087fd81c8:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "file/audit/ssh/file-limit-ssh-users-access.yaml"

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