AMSI <= 3.20.47 build 37 Directory Traversal Vulnerability - Active Check

# SPDX-FileCopyrightText: 2015 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("1.3.6.1.4.1.25623.1.0.805237");
  script_version("2025-04-15T05:54:49+0000");
  script_tag(name:"last_modification", value:"2025-04-15 05:54:49 +0000 (Tue, 15 Apr 2025)");
  script_tag(name:"creation_date", value:"2015-01-12 16:30:44 +0530 (Mon, 12 Jan 2015)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:N");

  script_tag(name:"qod_type", value:"remote_app");

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

  script_name("AMSI <= 3.20.47 build 37 Directory Traversal Vulnerability - Active Check");

  script_category(ACT_ATTACK);

  script_copyright("Copyright (C) 2015 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("find_service.nasl", "no404.nasl", "webmirror.nasl", "DDI_Directory_Scanner.nasl", "gb_php_http_detect.nasl", "os_detection.nasl", "global_settings.nasl");
  script_require_ports("Services/www", 80);
  script_exclude_keys("Settings/disable_cgi_scanning");

  script_tag(name:"summary", value:"Academia Management Solutions International (AMSI) is prone to
  a directory traversal vulnerability.");

  script_tag(name:"vuldetect", value:"Sends a crafted HTTP GET request checks the response.");

  script_tag(name:"insight", value:"The error exists due to the download.php script, which does not
  properly sanitize user input supplied via the 'file' parameter.");

  script_tag(name:"impact", value:"Successful exploitation will allow remote attackers to read
  arbitrary files on the target system.");

  script_tag(name:"affected", value:"AMSI version 3.20.47 build 37 and probably prior.");

  script_tag(name:"solution", value:"No known solution was made available for at least one year
  since the disclosure of this vulnerability. Likely none will be provided anymore. General
  solution options are to upgrade to a newer release, disable respective features, remove the
  product or replace the product by another one.");

  script_xref(name:"URL", value:"http://packetstormsecurity.com/files/129714");

  exit(0);
}

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

port = http_get_port(default: 80);

if (!http_can_host_php(port: port))
  exit(0);

files = traversal_files();

foreach dir (make_list_unique("/", "/amsi", "/AMSI", http_cgi_dirs(port: port))) {
  if (dir == "/")
    dir = "";

  res = http_get_cache(port: port, item: dir + "/download.php");
  if (!res || res !~ "^HTTP/1\.[01] 200")
    continue;

  foreach file (keys(files)){
    url = dir + "/download.php?file=" + files[file];

    if (http_vuln_check(port: port, url:url, pattern:file,
                        extra_check: make_list("amsi_web", "amsi_moodle"))) {
      report = http_report_vuln_url(port: port, url: url);
      security_message(port: port, data: report);
      exit(0);
    }
  }
}

exit(99);