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Nuclei Templates

Set SSH Idle Timeout Interval

ID: file-idle-timeout-interval

Severity: unknown

Author: pussycat0x

Tags: audit,config,file,ssh

Description

Section titled “Description”

Missing an SSH idle timeout interval can lead to security risks by allowing unattended sessions to remain open, increasing the chance of unauthorized access or session hijacking.

YAML Source

Section titled “YAML Source”
id: file-idle-timeout-interval


info:
  name: Set SSH Idle Timeout Interval
  author: pussycat0x
  severity: unknown
  description: |
    Missing an SSH idle timeout interval can lead to security risks by allowing unattended sessions to remain open, increasing the chance of unauthorized access or session hijacking.
  remediation: |
    Set ClientAliveInterval 300 and ClientAliveCountMax 0 in /etc/ssh/sshd_config to enforce an idle timeout and restart the SSH service.
  reference:
    - https://vishalraj82.medium.com/hardening-openssh-security-37f5d634015f
    - https://support.forcepoint.com/s/article/000015900
  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:
          - "ClientAliveInterval"
          - "ClientAliveCountMax"
        condition: or
        negative: true
# digest: 4a0a00473045022015133b4487142ff83a65980780210a8b78377c08d5939d117b528ec49b78f98b022100d2edb3ca543c655c9bd84f3888309b4a20c40557074dd405bcea1df996c843a2:922c64590222798bb761d5b6d8e72950

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-idle-timeout-Interval.yaml"

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