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Nuclei Templates

SSH SHA-1 HMAC Algorithms Enabled

ID: ssh-sha1-hmac-algo

Severity: info

Author: pussycat0x

Tags: enum,js,ssh,misconfig,network

Description

Section titled “Description”

The SSH server at the remote end is set up to allow the use of SHA-1 HMAC algorithms.

YAML Source

Section titled “YAML Source”
id: ssh-sha1-hmac-algo


info:
  name: SSH SHA-1 HMAC Algorithms Enabled
  author: pussycat0x
  severity: info
  description: |
    The SSH server at the remote end is set up to allow the use of SHA-1 HMAC algorithms.
  reference:
    - https://forums.ivanti.com/s/article/How-to-disable-SSH-SHA-1-HMAC-algorithms?language=en_US
  metadata:
    verified: true
    max-request: 2
    shodan-query: product:"OpenSSH"
  tags: enum,js,ssh,misconfig,network


javascript:
  - pre-condition: |
      isPortOpen(Host,Port);
    code: |
      let m = require("nuclei/ssh");
      let c = m.SSHClient();
      let response = c.ConnectSSHInfoMode(Host, Port);
      Export(response);


    args:
      Host: "{{Host}}"
      Port: "22"


    matchers-condition: and
    matchers:
      - type: word
        words:
          - "server_to_client_macs"
          - "client_to_server_macs"
        condition: and


      - type: word
        words:
          - "hmac-sha1"
# digest: 4a0a0047304502201320f7b3bbab6a1d110c31f2b34485954ba720312fbf9b04358c7cbf06fdc177022100ec2d452661c5f79d0cf41cefa734d976ac90177dc73f65733331662763021cc1:922c64590222798bb761d5b6d8e72950

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 "javascript/enumeration/ssh/ssh-sha1-hmac-algo.yaml"

View on Github