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Nuclei Templates

Cloudflare External Image Resizing Misconfiguration

ID: cloudflare-external-image-resize

Severity: info

Author: vavkamil

Tags: cloudflare,misconfig,oast

Description

Section titled “Description”

Cloudflare Image Resizing defaults to restricting resizing to the same domain. This prevents third parties from resizing any image at any origin. However, you can enable this option if you check Resize images from any origin.

YAML Source

Section titled “YAML Source”
id: cloudflare-external-image-resize


info:
  name: Cloudflare External Image Resizing Misconfiguration
  author: vavkamil
  severity: info
  description: Cloudflare Image Resizing defaults to restricting resizing to the same domain. This prevents third parties from resizing any image at any origin. However, you can enable this option if you check Resize images from any origin.
  reference:
    - https://support.cloudflare.com/hc/en-us/articles/360028146432-Understanding-Cloudflare-Image-Resizing#12345684
  metadata:
    max-request: 1
  tags: cloudflare,misconfig,oast


http:
  - raw:
      - |
        GET /cdn-cgi/image/width/https://{{interactsh-url}} HTTP/1.1
        Host: {{Hostname}}
        Accept: */*


    matchers:
      - type: word
        part: interactsh_protocol
        words:
          - "http"
# digest: 490a00463044022029fbaccdff08186c39c598a8fef8897f143481062723cbe69576cbdf2fe18a0002204831aec1aeb8c9ef12715b436d7a30fcf17887673cbebfc7fd419fec08b9d11d: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/misconfiguration/cloudflare-image-ssrf.yaml"

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