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Nuclei Templates

Exposed Internal PKI Infrastructure - Detect

ID: exposed-pki-cert

Severity: high

Author: nullenc0de

Tags: pki,exposure,misconfig

Description

Section titled “Description”

Detects exposed internal PKI infrastructure including CRL distribution points and OCSP responders

YAML Source

Section titled “YAML Source”
id: exposed-pki-cert


info:
  name: Exposed Internal PKI Infrastructure - Detect
  author: nullenc0de
  severity: high
  description: |
    Detects exposed internal PKI infrastructure including CRL distribution points and OCSP responders
  metadata:
    verified: true
    max-request: 10
  tags: pki,exposure,misconfig


http:
  - method: GET
    path:
      - "{{BaseURL}}/{{paths}}"


    payloads:
      paths:
        - ""
        - "certsrv/"
        - "pki/"
        - "PKI/"
        - "crl/"
        - "CRL/"
        - ".well-known/pki-validation/"
        - "ocsp/"
        - "CertEnroll/"
        - "CertSrv/"


    stop-at-first-match: true
    host-redirects: true
    max-redirects: 2
    matchers-condition: or
    matchers:
      - type: dsl
        dsl:
          - 'contains_any(body, "Certificate Services", "CRL Distribution Point", "OCSP Responder")'
          - '!regex("^This is an OCSP responder.$", body)'
        condition: and


      - type: regex
        regex:
          - 'CN=[A-Za-z0-9-]+-CA'
          - '(?i)<a\s+href="([^"]+\.crl)"[^>]*>[^<]*\.crl<\/a>'
          - '(?i)<a\s+href="([^"]+\.cer)"[^>]*>[^<]*\.cer<\/a>'
          - '(?i)<a\s+href="([^"]+\.p7b)"[^>]*>[^<]*\.p7b<\/a>'
          - '(?i)href="([^"]+\.crl)"'
          - '(?i)href="([^"]+\.cer)"'
          - '(?i)href="([^"]+\.p7b)"'
        condition: or


    extractors:
      - type: regex
        name: certificate_details
        regex:
          - "CN=[A-Za-z0-9-]+-CA"
          - "O=[A-Za-z0-9 ]+"
          - "OU=[A-Za-z0-9 ]+"
# digest: 490a004630440220275be7e096b281697f76f09c5b0b199aa3e8c66ff5351c343c51fec6e72a06fa02207e610a9715c8c54515e2184c68d6a49d3abbcc8869e9718dfe62c0186a8e5ddf: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/exposures/files/exposed-pki-cert.yaml"

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