Nmap NSE net: http-passwd

2011-06-01T00:00:00
ID OPENVAS:104038
Type openvas
Reporter NSE-Script: The Nmap Security Scanner; NASL-Wrapper: Greenbone Networks GmbH
Modified 2017-03-06T00:00:00

Description

Checks if a web server is vulnerable to directory traversal by attempting to retrieve '/etc/passwd' or '\boot.ini'.

The script uses several technique: * Generic directory traversal by requesting paths like '../../../../etc/passwd'. * Known specific traversals of several web servers. * Query string traversal. This sends traversals as query string parameters to paths that look like they refer to a local file name. The potential query is searched for in at the path controlled by the script argument 'http-passwd.root'.

SYNTAX:

http.pipeline: If set, it represents the number of HTTP requests that'll be pipelined (ie, sent in a single request). 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.useragent: The value of the User-Agent header field sent with requests. By default it is ''Mozilla/5.0 (compatible; Nmap Scripting Engine; http://nmap.org/book/nse.html)''. A value of the empty string disables sending the User-Agent header field.

http-max-cache-size: The maximum memory size (in bytes) of the cache.

http-passwd.root: Query string tests will be done relative to this path. The default value is '/'. Normally the value should contain a leading slash. The queries will be sent with a trailing encoded null byte to evade certain checks; see http://insecure.org/news/P55-01.txt.

                                        
                                            ###############################################################################
# OpenVAS Vulnerability Test
# $Id: gb_nmap_http_passwd_net.nasl 5499 2017-03-06 13:06:09Z teissa $
#
# Autogenerated NSE wrapper
#
# Authors:
# NSE-Script: Kris Katterjohn, Ange Gutek
# NASL-Wrapper: autogenerated
#
# Copyright:
# NSE-Script: The Nmap Security Scanner (http://nmap.org)
# Copyright (C) 2011 Greenbone Networks GmbH, http://www.greenbone.net
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2
# (or any later version), as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
###############################################################################

tag_summary = "Checks if a web server is vulnerable to directory traversal by attempting to retrieve
'/etc/passwd' or '\boot.ini'.

The script uses several technique: * Generic directory traversal by requesting paths like
'../../../../etc/passwd'. * Known specific traversals of several web servers. * Query
string traversal. This sends traversals as query string parameters to paths that look like they
refer to a local file name. The potential query is searched for in at the path controlled by the
script argument 'http-passwd.root'.


SYNTAX:

http.pipeline:  If set, it represents the number of HTTP requests that'll be
pipelined (ie, sent in a single request). 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.useragent:  The value of the User-Agent header field sent with
requests. By default it is
''Mozilla/5.0 (compatible; Nmap Scripting Engine; http://nmap.org/book/nse.html)''.
A value of the empty string disables sending the User-Agent header field.



http-max-cache-size:  The maximum memory size (in bytes) of the cache.



http-passwd.root:  Query string tests will be done relative to this path.
The default value is '/'. Normally the value should contain a
leading slash. The queries will be sent with a trailing encoded null byte to
evade certain checks; see http://insecure.org/news/P55-01.txt.";

if(description)
{
    script_id(104038);
    script_version("$Revision: 5499 $");
    script_tag(name:"last_modification", value:"$Date: 2017-03-06 14:06:09 +0100 (Mon, 06 Mar 2017) $");
    script_tag(name:"creation_date", value:"2011-06-01 16:32:46 +0200 (Wed, 01 Jun 2011)");
    script_tag(name:"cvss_base", value:"7.5");
    script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
    script_name("Nmap NSE net: http-passwd");


    script_category(ACT_INIT);
    script_tag(name:"qod_type", value:"remote_analysis");
    script_copyright("NSE-Script: The Nmap Security Scanner; NASL-Wrapper: Greenbone Networks GmbH");
    script_family("Nmap NSE net");
    script_dependencies("nmap_nse_net.nasl");
    script_mandatory_keys("Tools/Launch/nmap_nse_net");

    script_add_preference(name:"http.pipeline", value:"", type:"entry");
    script_add_preference(name:"http.useragent", value:"", type:"entry");
    script_add_preference(name:"http-max-cache-size", value:"", type:"entry");
    script_add_preference(name:"http-passwd.root", value:"", type:"entry");

    script_tag(name : "summary" , value : tag_summary);
    exit(0);
}


include("nmap.inc");

# The corresponding NSE script does't belong to the 'safe' category
if (safe_checks()) exit(0);

phase = 0;
if (defined_func("scan_phase")) {
    phase = scan_phase();
}

if (phase == 1) {
    # Get the preferences
    argv = make_array();

    pref = script_get_preference("http.pipeline");
    if (!isnull(pref) && pref != "") {
        argv["http.pipeline"] = string('"', pref, '"');
    }
    pref = script_get_preference("http.useragent");
    if (!isnull(pref) && pref != "") {
        argv["http.useragent"] = string('"', pref, '"');
    }
    pref = script_get_preference("http-max-cache-size");
    if (!isnull(pref) && pref != "") {
        argv["http-max-cache-size"] = string('"', pref, '"');
    }
    pref = script_get_preference("http-passwd.root");
    if (!isnull(pref) && pref != "") {
        argv["http-passwd.root"] = string('"', pref, '"');
    }
    nmap_nse_register(script:"http-passwd", args:argv);
} else if (phase == 2) {
    res = nmap_nse_get_results(script:"http-passwd");
    foreach portspec (keys(res)) {
        output_banner = 'Result found by Nmap Security Scanner (http-passwd.nse) http://nmap.org:\n\n';
        if (portspec == "0") {
            security_message(data:output_banner + res[portspec], port:0);
        } else {
            v = split(portspec, sep:"/", keep:0);
            proto = v[0];
            port = v[1];
            security_message(data:output_banner + res[portspec], port:port, protocol:proto);
        }
    }
}