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Diffstat (limited to '')
-rw-r--r-- | scripts/http-vuln-cve2011-3192.nse | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/scripts/http-vuln-cve2011-3192.nse b/scripts/http-vuln-cve2011-3192.nse new file mode 100644 index 0000000..bbbf2a7 --- /dev/null +++ b/scripts/http-vuln-cve2011-3192.nse @@ -0,0 +1,128 @@ +local http = require "http" +local shortport = require "shortport" +local stdnse = require "stdnse" +local vulns = require "vulns" + +description = [[ +Detects a denial of service vulnerability in the way the Apache web server +handles requests for multiple overlapping/simple ranges of a page. + +References: +* https://seclists.org/fulldisclosure/2011/Aug/175 +* https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-3192 +* https://www.tenable.com/plugins/nessus/55976 +]] + +--- +-- @see http-slowloris-check.nse +-- @see http-slowloris.nse +-- +-- @usage +-- nmap --script http-vuln-cve2011-3192.nse [--script-args http-vuln-cve2011-3192.hostname=nmap.scanme.org] -pT:80,443 <host> +-- +-- @output +-- Host script results: +-- | http-vuln-cve2011-3192: +-- | VULNERABLE: +-- | Apache byterange filter DoS +-- | State: VULNERABLE +-- | IDs: CVE:CVE-2011-3192 BID:49303 +-- | Description: +-- | The Apache web server is vulnerable to a denial of service attack when numerous +-- | overlapping byte ranges are requested. +-- | Disclosure date: 2011-08-19 +-- | References: +-- | https://seclists.org/fulldisclosure/2011/Aug/175 +-- | https://www.tenable.com/plugins/nessus/55976 +-- | https://www.securityfocus.com/bid/49303 +-- |_ https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-3192 +-- +-- @args http-vuln-cve2011-3192.hostname Define the host name to be used in the HEAD request sent to the server +-- @args http-vuln-cve2011-3192.path Define the request path + +-- changelog +-- 2011-08-29 Duarte Silva <duarte.silva@serializing.me> +-- - Removed the "Accept-Encoding" HTTP header +-- - Removed response header printing +-- * Changes based on Henri Doreau and David Fifield suggestions +-- 2011-08-20 Duarte Silva <duarte.silva@serializing.me> +-- * First version ;) +-- 2011-11-07 Henri Doreau +-- * Use the vulns library to report results +----------------------------------------------------------------------- + +author = "Duarte Silva <duarte.silva@serializing.me>" +license = "Same as Nmap--See https://nmap.org/book/man-legal.html" +categories = {"vuln", "safe"} + + +portrule = shortport.http + +action = function(host, port) + local vuln = { + title = 'Apache byterange filter DoS', + state = vulns.STATE.NOT_VULN, -- default + IDS = {CVE = 'CVE-2011-3192', BID = '49303'}, + description = [[ +The Apache web server is vulnerable to a denial of service attack when numerous +overlapping byte ranges are requested.]], + references = { + 'https://seclists.org/fulldisclosure/2011/Aug/175', + 'https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-3192', + 'https://www.tenable.com/plugins/nessus/55976', + }, + dates = { + disclosure = {year = '2011', month = '08', day = '19'}, + }, + } + local vuln_report = vulns.Report:new(SCRIPT_NAME, host, port) + local hostname, path = stdnse.get_script_args('http-vuln-cve2011-3192.hostname', + 'http-vuln-cve2011-3192.path') + + if not path then + path = '/' + + stdnse.debug1("Setting the request path to '/' since 'http-vuln-cve2011-3192.path' argument is missing.") + end + + -- This first request will try to get a code 206 reply from the server by + -- sending the innocuous header "Range: byte=0-100" in order to detect + -- whether this functionality is available or not. + local request_opts = { + header = { + Range = "bytes=0-100", + Connection = "close" + }, + bypass_cache = true + } + + if hostname then + request_opts.header.Host = hostname + end + + local response = http.head(host, port, path, request_opts) + + if not response.status then + stdnse.debug1("Functionality check HEAD request failed for %s (with path '%s').", hostname or host.ip, path) + elseif response.status == 206 then + -- The server handle range requests. Now try to request 11 ranges (one more + -- than allowed). + -- Vulnerable servers will reply with another code 206 response. Patched + -- ones will return a code 200. + request_opts.header.Range = "bytes=1-0,0-0,1-1,2-2,3-3,4-4,5-5,6-6,7-7,8-8,9-9,10-10" + + response = http.head(host, port, path, request_opts) + + if not response.status then + stdnse.debug1("Invalid response from server to the vulnerability check") + elseif response.status == 206 then + vuln.state = vulns.STATE.VULN + else + stdnse.debug1("Server isn't vulnerable (%i status code)", response.status) + end + else + stdnse.debug1("Server ignores the range header (%i status code)", response.status) + end + return vuln_report:make_output(vuln) +end + |