Open Proxy To External Network

ID: open-proxy-external

Severity: medium

Author: gtrrnr

Tags: exposure,config,proxy,misconfig

Description

The host is configured as a proxy which allows access to other hosts on the external network.

YAML Source

id: open-proxy-external

info:
  name: Open Proxy To External Network
  author: gtrrnr
  severity: medium
  description: The host is configured as a proxy which allows access to other hosts on the external network.
  remediation: Disable the proxy or restrict configuration to only allow access to approved hosts/ports.
  reference:
    - https://en.wikipedia.org/wiki/Open_proxy
    - https://www.acunetix.com/vulnerabilities/web/apache-configured-to-run-as-proxy/
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
    cvss-score: 5.8
    cwe-id: CWE-441
  metadata:
    max-request: 3
  tags: exposure,config,proxy,misconfig

http:
  - raw:
      - |+
        GET https://test.s3.amazonaws.com HTTP/1.1
        Host: test.s3.amazonaws.com

      - |+
        GET http://{{interactsh-url}} HTTP/1.1
        Host: {{interactsh-url}}

      - |+
        GET / HTTP/1.1
        Host: {{Hostname}}

    unsafe: true

    matchers-condition: and
    matchers:
      - type: dsl
        dsl:
          - contains_any(body_1, "<HostId>", "</HostId>")
          - contains(header_2, "X-Interactsh-Version")
        condition: and

      - type: dsl
        dsl:
          - '!contains(body_3, "<HostId>")'
          - '!contains(header_3, "X-Interactsh-Version")'
        condition: and
# digest: 490a0046304402204d8b696b11a0e4e514a61064c159012a084637f19975fb5845fca801a5f2a2250220346dfc075c75097ff1b5ff3294aacf90af2132cf78e6e7252aacc8183c7312e5:922c64590222798bb761d5b6d8e72950

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.

$ nuclei -u "URL" -t "http/misconfiguration/proxy/open-proxy-external.yaml"

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