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95 lines
3.3 KiB
Lua
95 lines
3.3 KiB
Lua
description = [[
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This script will check for a denial of service vulnerability that has been
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found in the way the multiple overlapping/simple ranges are handled.
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References:
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* http://seclists.org/fulldisclosure/2011/Aug/175
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* http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-3192
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* http://nessus.org/plugins/index.php?view=single&id=55976
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]]
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---
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-- @usage
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-- nmap --script http-vuln-cve2011-3192.nse [--script-args http-vuln-cve2011-3192.hostname=nmap.scanme.org] -pT:80,443 <host>
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--
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-- @output
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-- Host script results:
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-- | http-vuln-cve2011-3192:
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-- |_ Apache byterange filter DoS: VULNERABLE
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--
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-- @args http-vuln-cve2011-3192.hostname Define the host name to be used in the HEAD request sent to the server
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-- @args http-vuln-cve2011-3192.path Define the request path
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-- changelog
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-- 2011-08-29 Duarte Silva <duarte.silva@serializing.me>
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-- - Removed the "Accept-Encoding" HTTP header
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-- - Removed response header printing
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-- * Changes based on Henri Doreau and David Fifield sugestions
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-- 2011-08-20 Duarte Silva <duarte.silva@serializing.me>
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-- * First version ;)
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-----------------------------------------------------------------------
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author = "Duarte Silva <duarte.silva@serializing.me>"
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license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
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categories = {"vuln", "safe"}
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require "shortport"
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require "http"
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portrule = shortport.http
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action = function(host, port)
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local hostname, path = stdnse.get_script_args('http-vuln-cve2011-3192.hostname',
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'http-vuln-cve2011-3192.path')
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if not path then
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path = '/'
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stdnse.print_debug(1, "Setting the request path to '/' since 'http-vuln-cve2011-3192.path' argument is missing.")
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end
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-- This first request will try to get a code 206 reply from the server by
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-- sending the innocuous header "Range: byte=0-100" in order to detect
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-- whether this functionality is available or not.
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local request_opts = {
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header = {
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Range = "bytes=0-100",
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Connection = "close"
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},
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bypass_cache = true
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}
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if hostname then
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request_opts.header.Host = hostname
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end
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local response = http.head(host, port, path, request_opts)
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if not response.status then
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stdnse.print_debug(1, "%s: Functionality check HEAD request failed for %s (with path '%s').",
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SCRIPT_NAME, hostname or host.ip, path)
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elseif response.status == 206 then
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-- The server handle range requests. Now try to request 11 ranges (one more
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-- than allowed).
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-- Vulnerable servers will reply with another code 206 response. Patched
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-- ones will return a code 200.
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request_opts.header.Range = "bytes=0-0,1-1,2-2,3-3,4-4,5-5,6-6,7-7,8-8,9-9,10-10"
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response = http.head(host, port, path, request_opts)
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if not response.status then
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stdnse.print_debug(1, "%s: Invalid response from server to the vulnerability check",
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SCRIPT_NAME)
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elseif response.status == 206 then
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return stdnse.format_output(true, "Apache byterange filter DoS: VULNERABLE")
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else
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stdnse.print_debug(1, "%s: Server isn't vulnerable (%i status code)",
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SCRIPT_NAME, response.status)
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end
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else
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stdnse.print_debug(1, "%s: Server ignores the range header (%i status code)",
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SCRIPT_NAME, response.status)
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end
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end
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