id: ssh-diffie-hellman-logjam

info:
  name: SSH Diffie-Hellman Modulus <= 1024 Bits
  author: pussycat0x
  severity: low
  description: |
    SSH weak algorithms are outdated cryptographic methods that pose security risks. Identifying and disabling these vulnerable algorithms is crucial for enhancing the overall security of SSH connections.
  reference:
    - https://access.redhat.com/solutions/4278651
  metadata:
    verified: true
    shodan-query: product:"OpenSSH"
  tags: javascript,ssh,misconfig,network

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

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

    matchers-condition: and
    matchers:
      - type: word
        words:
          - "kex_algorithms"

      - type: word
        words:
          - "diffie-hellman-group1-sha1"
# digest: 490a004630440220384a32fbd95b3542710087444718246de0f7e6226e5b4994998c4b3d17b2fc650220587a39c3817c1d3aa4a87d05efe2274312da1ee8598ee5053d2a6ae971813354:922c64590222798bb761d5b6d8e72950