nuclei-templates/misconfiguration/proxy/open-proxy-localhost.yaml

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id: open-proxy-http-portscan
info:
name: Open Proxy to Other Web Ports via Proxy's localhost Interface
author: sullo
severity: high
description: The host is configured as a proxy which allows access to web ports on the host's internal interface.
reference:
- https://blog.projectdiscovery.io/abusing-reverse-proxies-internal-access/
- 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:H/I:N/A:N
cvss-score: 8.6
cwe-id: CWE-441
remediation: Disable the proxy or restrict configuration to only allow access to approved hosts/ports.
tags: exposure,config,proxy,misconfig,fuzz
requests:
- raw:
- |+
GET / HTTP/1.1
Host: {{Hostname}}
- |+
GET http://somethingthatdoesnotexist/ HTTP/1.1
Host: somethingthatdoesnotexist
- |+
GET http://127.0.0.1/ HTTP/1.1
Host: 127.0.0.1
- |+
GET https://127.0.0.1/ HTTP/1.1
Host: 127.0.0.1
- |+
GET http://localhost/ HTTP/1.1
Host: localhost
- |+
GET https://localhost/ HTTP/1.1
Host: localhost
unsafe: true
req-condition: true
stop-at-first-match: true
matchers:
- type: dsl
condition: or
dsl:
- (!contains(body_1, "<title>IIS7</title>") && !contains(body_2, "<title>IIS7</title>")) && (contains(body_3, "<title>IIS7</title>") || contains(body_4, "<title>IIS7</title>") || contains(body_5, "<title>IIS7</title>") || contains(body_6, "<title>IIS7</title>"))
- (!contains(body_1, "503 Service Unavailable") && !contains(body_2, "503 Service Unavailable")) && (contains(body_3, "503 Service Unavailable") || contains(body_4, "503 Service Unavailable") || contains(body_5, "503 Service Unavailable") || contains(body_6, "503 Service Unavailable"))
- (!contains(body_1, "default welcome page") && !contains(body_2, "default welcome page")) && (contains(body_3, "default welcome page") || contains(body_4, "default welcome page") || contains(body_5, "default welcome page") || contains(body_6, "default welcome page"))
- (!contains(body_1, "IIS Windows Server") && !contains(body_2, "IIS Windows Server")) && (contains(body_3, "IIS Windows Server") || contains(body_4, "IIS Windows Server") || contains(body_5, "IIS Windows Server") || contains(body_6, "IIS Windows Server"))
- (!contains(body_1, "Microsoft Azure App") && !contains(body_2, "Microsoft Azure App")) && (contains(body_3, "Microsoft Azure App") || contains(body_4, "Microsoft Azure App") || contains(body_5, "Microsoft Azure App") || contains(body_6, "Microsoft Azure App"))
- (!contains(body_1, "Welcome to IIS") && !contains(body_2, "Welcome to IIS")) && (contains(body_3, "Welcome to IIS") || contains(body_4, "Welcome to IIS") || contains(body_5, "Welcome to IIS") || contains(body_6, "Welcome to IIS"))
- (!contains(body_1, "Welcome to Microsoft Windows") && !contains(body_2, "Welcome to Microsoft Windows")) && (contains(body_3, "Welcome to Microsoft Windows") || contains(body_4, "Welcome to Microsoft Windows") || contains(body_5, "Welcome to Microsoft Windows") || contains(body_6, "Welcome to Microsoft Windows"))
- (!contains(body_1, "Welcome to Windows") && !contains(body_2, "Welcome to Windows")) && (contains(body_3, "Welcome to Windows") || contains(body_4, "Welcome to Windows") || contains(body_5, "Welcome to Windows") || contains(body_6, "Welcome to Windows"))
- (!contains(body_1, "Welcome to Windows") && !contains(body_2, "Welcome to Windows")) && (contains(body_3, "Welcome to Windows") || contains(body_4, "Welcome to Windows") || contains(body_5, "Welcome to Windows") || contains(body_6, "Welcome to Windows"))
- (!contains(body_1, "It works") && !contains(body_2, "It works")) && (contains(body_3, "It works") || contains(body_4, "It works") || contains(body_5, "It works") || contains(body_6, "It works"))
# Enhanced by mp on 2022/04/21