Skip to content
Nuclei Templates

Unauthenticated ZyXEL USG ZTP - Detect

ID: unauth-ztp-ping

Severity: high

Author: dmartyn

Tags: misconfig,unauth,zyxel,ztp,rce,oast

Description

Section titled “Description”

Make a ZyXEL USG with ZTP support, pre CVE-2023-28771 patch, do a DNS lookup by asking it to make an ICMP request.This template can be used to detect hosts potentially vulnerable to CVE-2023-28771, CVE-2022-30525, and other issues, without actually exploiting the vulnerability.

YAML Source

Section titled “YAML Source”
id: unauth-ztp-ping


info:
  name: Unauthenticated ZyXEL USG ZTP - Detect
  author: dmartyn
  severity: high
  description: |
    Make a ZyXEL USG with ZTP support, pre CVE-2023-28771 patch, do a DNS lookup by asking it to make an ICMP request.
    This template can be used to detect hosts potentially vulnerable to CVE-2023-28771, CVE-2022-30525, and other issues, without actually exploiting the vulnerability.
  reference:
    - https://www.fullspectrum.dev/the-hunt-for-cve-2023-28771-friends-part-2-fingerprinting-handler/
    - https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-remote-command-injection-vulnerability-of-firewalls
  classification:
    cpe: cpe:2.3:o:zyxel:usg1000_firmware:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: zyxel
    product: usg1000_firmware
    shodan-query: title:"USG FLEX"
  tags: misconfig,unauth,zyxel,ztp,rce,oast


http:
  - raw:
      - |
        POST /ztp/cgi-bin/handler HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json


        {"command":"ping","dest":"{{interactsh-url}}"}


    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol
        words:
          - "dns"


      - type: word
        part: body
        words:
          - "message"
          - "result"
        condition: and


      - type: status
        status:
          - 200
# digest: 490a00463044022043fb754803404a7cd4d4f80b9be99c7314ac6727239aa41aa0bc163ddc4fc1fc022046b004ccf52c3aa99f0891e30b7fb557f6a00eb1ba087579d3fb6ca2c4e23aa1:922c64590222798bb761d5b6d8e72950

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 "http/vulnerabilities/zyxel/unauth-ztp-ping.yaml"

View on Github