Nmap http-method-tamper NSE Script
This page contains detailed information about how to use the http-method-tamper NSE script. For list of all NSE scripts, visit the Nmap NSE Library.
Script Overview
Script source code: https://github.com/nmap/nmap/tree/master/scripts/http-method-tamper.nse
Script categories: auth, vuln
Target service / protocol: http, https
Target network port(s): 80, 443, 631, 7080, 8080, 8443, 8088, 5800, 3872, 8180, 8000
List of CVEs: -
Script Description
The http-method-tamper.nse script attempts to bypass password protected resources (HTTP 401 status) by performing HTTP verb tampering. If an array of paths to check is not set, it will crawl the web server and perform the check against any password protected resource that it finds.
The script determines if the protected URI is vulnerable by performing HTTP verb tampering and monitoring the status codes. First, it uses a HEAD request, then a POST request and finally a random generated string ( This last one is useful when web servers treat unknown request methods as a GET request. This is the case for PHP servers ).
If the table paths
is set, it will attempt to access the given URIs. Otherwise, a web crawler
is initiated to try to find protected resources. Note that in a PHP environment with .htaccess files you need to specify a
path to a file rather than a directory to find misconfigured .htaccess files.
References:
- http://www.imperva.com/resources/glossary/http_verb_tampering.html
- https://www.owasp.org/index.php/Testing_for_HTTP_Methods_and_XST_%28OWASP-CM-008%29
- http://www.mkit.com.ar/labs/htexploit/
- http://capec.mitre.org/data/definitions/274.html
Http-method-tamper NSE Script Arguments
This is a full list of arguments supported by the http-method-tamper.nse script:
http-method-tamper.pathsArray of paths to check. If not set, the script will crawl the web server.
http-method-tamper.timeoutWeb crawler timeout. Default: 10s
http-method-tamper.uri
Base URI to crawl. Not applicable if http-method-tamper.paths
is set.
The domain to log in with. If you aren't in a domain environment, then anything will (should?) be accepted by the server.
smbhashA password hash to use when logging in. This is given as a single hex string (32 characters) or a pair of hex strings (both 32 characters, optionally separated by a single character). These hashes are the LanMan or NTLM hash of the user's password, and are stored on disk or in memory. They can be retrieved from memory using the fgdump or pwdump tools.
smbnoguestUse to disable usage of the 'guest' account.
smbpasswordThe password to connect with. Be cautious with this, since some servers will lock accounts if the incorrect password is given. Although it's rare that the Administrator account can be locked out, in the off chance that it can, you could get yourself in trouble. To use a blank password, leave this parameter off altogether.
smbtypeThe type of SMB authentication to use. These are the possible options:
v1
: Sends LMv1 and NTLMv1.LMv1
: Sends LMv1 only.NTLMv1
: Sends NTLMv1 only (default).v2
: Sends LMv2 and NTLMv2.LMv2
: Sends LMv2 only.NTLMv2
: Doesn't exist; the protocol doesn't support NTLMv2 alone. The default,NTLMv1
, is a pretty decent compromise between security and compatibility. If you are paranoid, you might want to usev2
orlmv2
for this. (Actually, if you're paranoid, you should be avoiding this protocol altogether!). If you're using an extremely old system, you might need to set this tov1
orlm
, which are less secure but more compatible. For information, seesmbauth.lua
.
The SMB username to log in with. The forms "DOMAIN\username" and "username@DOMAIN" are not understood. To set a domain, use the smbdomain
argument.
Debug level at which default callbacks will print detailed parsing info. Default: 3
http.host
The value to use in the Host header of all requests unless otherwise set. By default, the Host header uses the output of stdnse.get_hostname()
.
Limit the received body to specific number of bytes. An oversized body results in an error unless script argument http.truncated-ok
or request option truncated_ok
is set to true. The default is 2097152 (2MB). Use value -1 to disable the limit altogether. This argument can be overridden case-by-case with request option max_body_size
.
The maximum memory size (in bytes) of the cache.
http.max-pipeline
If set, it represents the number of outstanding HTTP requests that should be sent together in a single burst. Defaults to http.pipeline
(if set), or to what function get_pipeline_limit
returns.
If set, it represents the number of HTTP requests that'll be sent on one connection. This can be set low to make debugging easier, or it can be set high to test how a server reacts (its chosen max is ignored).
http.truncated-ok
Do not treat oversized body as error. (Use response object flag truncated
to check if the returned body has been truncated.) This argument can be overridden case-by-case with request option truncated_ok
.
The value of the User-Agent header field sent with requests. By default it is "Mozilla/5.0 (compatible; Nmap Scripting Engine; https://nmap.org/book/nse.html)"
. A value of the empty string disables sending the User-Agent header field.
If set, vulnerabilities will be output in short format, a single line consisting of the host's target name or IP, the state, and either the CVE ID or the title of the vulnerability. Does not affect XML output.
vulns.showall
If set, the library will show and report all the registered vulnerabilities which includes the NOT VULNERABLE
ones. By default the library will only report the VULNERABLE
entries: VULNERABLE
, LIKELY VULNERABLE
, VULNERABLE (DoS)
and VULNERABLE (Exploitable)
. This argument affects the following functions: vulns.Report.make_output(): the default output function for portule/hostrule scripts. vulns.make_output(): the default output function for postrule scripts. vulns.format_vuln() and vulns.format_vuln_table() functions.
- - -
To use these script arguments, add them to the Nmap command line using the --script-args arg1=value,[arg2=value,..]
syntax. For example:
nmap --script=http-method-tamper --script-args http-method-tamper.paths=value,http-method-tamper.timeout=value <target>
Http-method-tamper NSE Script Example Usage
Here's an example of how to use the http-method-tamper.nse script:
nmap -sV --script http-method-tamper <target>
nmap -p80 --script http-method-tamper --script-args 'http-method-tamper.paths={/protected/db.php,/protected/index.php}' <target>
Http-method-tamper NSE Script Example Output
Here's a sample output from the http-method-tamper.nse script:
PORT STATE SERVICE REASON
80/tcp open http syn-ack
| http-method-tamper:
| VULNERABLE:
| Authentication bypass by HTTP verb tampering
| State: VULNERABLE (Exploitable)
| Description:
| This web server contains password protected resources vulnerable to authentication bypass
| vulnerabilities via HTTP verb tampering. This is often found in web servers that only limit access to the
| common HTTP methods and in misconfigured .htaccess files.
|
| Extra information:
|
| URIs suspected to be vulnerable to HTTP verb tampering:
| /method-tamper/protected/pass.txt [POST]
|
| References:
| http://www.imperva.com/resources/glossary/http_verb_tampering.html
| http://www.mkit.com.ar/labs/htexploit/
| http://capec.mitre.org/data/definitions/274.html
|_ https://www.owasp.org/index.php/Testing_for_HTTP_Methods_and_XST_%28OWASP-CM-008%29
Http-method-tamper NSE Script Example XML Output
There is no sample XML output for this module. However, by providing the -oX <file>
option, Nmap will produce a XML output and save it in the file.xml
file.
Author
- Paulino Calderon [email protected]>
References
- https://nmap.org/nsedoc/scripts/http-method-tamper.html
- https://github.com/nmap/nmap/tree/master/scripts/http-method-tamper.nse
- http://www.imperva.com/resources/glossary/http_verb_tampering.html
- https://www.owasp.org/index.php/Testing_for_HTTP_Methods_and_XST_%28OWASP-CM-008%29
- http://www.mkit.com.ar/labs/htexploit/
- http://capec.mitre.org/data/definitions/274.html
See Also
Related NSE scripts to the http-method-tamper.nse script:
Visit Nmap NSE Library for more scripts.
Version
This page has been created based on Nmap version 7.92.